CN111123433A - Cutting device accessory, cutting device and optical fiber cutting method for special optical fiber - Google Patents
Cutting device accessory, cutting device and optical fiber cutting method for special optical fiber Download PDFInfo
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- CN111123433A CN111123433A CN201911344624.4A CN201911344624A CN111123433A CN 111123433 A CN111123433 A CN 111123433A CN 201911344624 A CN201911344624 A CN 201911344624A CN 111123433 A CN111123433 A CN 111123433A
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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Abstract
本发明提出了一种用于特种光纤的切割装置配件、切割装置及光纤切割方法。该切割装置配件包括夹具、视觉观测装置、顶断器及可调式平移台；所述夹具，用于以可松脱的方式安装在切割装置的一维平移台的平行于光纤放置方向的槽中，用于夹持并锁定待切割光纤的一端；所述视觉观测装置，安装在所述可调式平移台的升降调节架上，用于观测待切割光纤的待切割部分；所述顶断器，包括顶压块和用于驱动所述顶压块朝向待切割光纤施加顶压力的致动器；所述顶压块安装在所述致动器的运动部，用于在待切割光纤被切割装置的刀具预切割后顶压待切割光纤的预切割位置，以使待切割光纤断裂。通过上述方案能使光纤的切割端面平整无拖尾。
The invention provides a cutting device accessory, a cutting device and an optical fiber cutting method for special optical fibers. The accessories of the cutting device include a clamp, a visual observation device, a breaker and an adjustable translation stage; the clamp is used to be releasably installed in a groove parallel to the fiber placement direction of the one-dimensional translation stage of the cutting device , which is used to clamp and lock one end of the fiber to be cut; the visual observation device is installed on the lifting adjustment frame of the adjustable translation stage, and is used to observe the part to be cut of the fiber to be cut; the top breaker, It includes a top pressing block and an actuator for driving the top pressing block to apply top pressure to the optical fiber to be cut; the top pressing block is installed on the moving part of the actuator, and is used for the cutting device when the optical fiber to be cut is cut. After pre-cutting, the cutter presses the pre-cut position of the fiber to be cut to break the fiber to be cut. Through the above solution, the cut end face of the optical fiber can be made flat without tailing.
Description
Technical Field
The invention relates to the field of communication wire processing and construction equipment, in particular to a cutting device accessory, a cutting device and an optical fiber cutting method for special optical fibers.
Background
An important step prior to optical fiber fusion splicing is the cleaving of the optical fiber, which has a significant effect on both the fusion splice strength and the fusion splice loss. For very fine fibers, the cut fiber ends are flat after several hundred times of amplification and can be used for device packaging, cold splicing, and discharge fusion splicing.
In the cutting process of the prior art, a diamond cutter is generally used to make a micro-crack on the surface of the optical fiber, and the optical fiber is split by the tension applied to the optical fiber, thereby obtaining a high-quality cutting effect. When the optical fiber is cut by the cutter, the optical fiber with the coating layer stripped is cut by a specific angle by the cutter. The processing process comprises the steps that the left clamp and the right clamp of the cutter respectively clamp the optical fiber, a diamond blade is used for scratching a tiny crack on the surface of the optical fiber, and meanwhile, a certain pulling force is applied to break the optical fiber. The general requirements are that the error of the observation cutting angle of the side surface is small after cutting, the end surface is observed to be flat without trailing or knife edges (opening collapse), and particularly, in the process of optical fiber fusion, the cutting angle of more than 0.7 degrees or the trailing exceeding the diameter of a stress area by more than 20 percent cannot meet the requirement of high-quality fusion.
The existing optical fiber cutting equipment can better process common double-clad optical fibers such as GDF-20/400 and the like in the process of technological processing, but when processing special optical fibers such as panda type optical fibers, octagonal type optical fibers, bow-tie type optical fibers, I-shaped optical fibers, photonic crystal optical fibers and the like, the cutting effect is often unsatisfactory, the good and stable cutting effect is difficult to obtain, and the high-quality and high-repeatability cutting cannot be realized.
For example, in the current products of main suppliers of optical fiber cutting equipment, when a polarization maintaining optical fiber or other special optical fibers are cut, the same pulling force cannot ensure that the end surface is flat and has no tail when the cutting is performed at each axial angle (such as cat eye position 0 °, 15 °, 25 ° …) in the process of applying the pulling force. And it is difficult to secure the cutting effect.
Disclosure of Invention
In order to solve or alleviate the above problems in the prior art, the present invention provides a cutting device accessory, a cutting device and an optical fiber cutting method for a special optical fiber.
According to one aspect of the invention, a cutting device accessory for a special optical fiber is provided, the cutting device accessory comprising a clamp, a visual observation device, an ejector and an adjustable translation stage; the clamp is arranged in a groove, parallel to the optical fiber placing direction, of a one-dimensional translation table of the cutting device in a releasable mode and used for clamping and locking one end of the optical fiber to be cut; the visual observation device is arranged on the lifting adjusting frame of the adjustable translation table and is used for observing the part to be cut of the optical fiber to be cut; the ejector comprises an ejector pressing block and an actuator for driving the ejector pressing block to apply ejecting pressure to the optical fiber to be cut; the jacking block is arranged at the moving part of the actuator and used for jacking and cutting the pre-cutting position of the optical fiber to be cut after the optical fiber to be cut is pre-cut by a cutter of the cutting device so as to break the optical fiber to be cut.
In some embodiments, the actuator is a piezoelectric actuator or a voice coil motor.
In some embodiments, the stroke of the piezoelectric actuator is greater than 400 microns.
In some embodiments, the clamp is a fusion splicer transfer clamp.
In some embodiments, the top press block is a cylindrical top block.
In some embodiments, the visual observation device is an optical microscope or a digital microscope; the adjustable translation stage is configured to be movable in a fiber placement direction and a perpendicular fiber placement direction.
In some embodiments, the lift adjustable height of the lift adjustment bracket is not less than 35 mm; the magnification of the digital microscope is not less than 8 times; the surface roughness of the top compact is not more than 1.6.
According to another aspect of the present invention, there is provided a cutting device for a specialty optical fiber, comprising: the one-dimensional translation stage, the cutter, and the cutting device accessory of any of the above embodiments.
According to another aspect of the present invention, there is provided an optical fiber cutting method, which is applied to the cutting device according to any one of the above embodiments, the method including the steps of: installing a clamp in a first groove of a one-dimensional translation table, clamping an optical fiber section with a coating layer of an optical fiber to be cut by utilizing the clamp, and placing the optical fiber section with the coating layer removed of the optical fiber to be cut in a second groove; adjusting the position of the adjustable translation table and the lifting adjusting frame thereof to enable the visual observation device to clearly image the side surface of the cutting part of the optical fiber to be cut; before the clamp locks the optical fiber to be cut in place, manually pressing the optical fiber section with the optical fiber coating layer, manually rotating other parts of the optical fiber to be cut until a specific symmetrical image appears in side imaging of the cutting part of the optical fiber to be cut by the visual observation device, and locking the clamp; respectively covering and sealing the clamp and the optical fiber section of the optical fiber to be cut, of which the coating layer is stripped, by using a first cover plate and a second cover plate of the cutting device; adjusting the control voltage of the actuator, and controlling the top pressing block to reach a position away from the part to be cut of the optical fiber to be cut by a set length; starting a cutting program, and utilizing a cutter to complete pre-cutting of the part to be cut of the optical fiber to be cut for preset times; and gradually adjusting the voltage of the actuator to enable the jacking block to slowly jack the pre-cutting position of the optical fiber to be cut until the optical fiber to be cut is broken.
In some embodiments, the optical fiber cleaving method further comprises: if the cutting optical fiber is broken for a preset number of times, reducing the advancing value or cutting times of the cutter; if the cutting angle of the optical fiber is large and the end face has no tail, the control voltage of the actuator is reduced; if the cutting angle of the optical fiber is small and the end face is trailing, reducing the pulling force or the pulling force stepping amount; if the cut end face of the optical fiber has obvious knife edge or broken edge, the pre-feeding amount, the cutting stepping amount and the cutting times of the optical fiber are reduced.
The cutting device fitting, the cutting device and the optical fiber cutting method for the special optical fiber provided by the embodiment of the invention can realize high-precision cutting of the special optical fibers such as panda type optical fibers, octagonal type optical fibers, bow-tie type optical fibers, I-shaped optical fibers, photonic crystal optical fibers and the like, and have the advantages of small optical fiber cutting angle, flat and non-trailing cutting end surface and extremely high repeatability.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.
Drawings
The accompanying drawings, which are described herein to provide a further understanding of the invention, are included in the following description:
FIG. 1 is a side view of a cutting device accessory for specialty optical fibers in accordance with an embodiment of the present invention;
FIG. 2 is a schematic side view of a cutting device assembly for specialty optical fibers according to another embodiment of the present invention in use with a cutting device;
FIG. 3 is a partially enlarged schematic view of another perspective encircled by a dashed line in FIG. 2;
fig. 4 is a schematic end view showing the construction of a fitting of a cutting device for a special optical fiber according to an embodiment of the present invention shown in fig. 2 when used in conjunction with the cutting device.
Description of reference numerals:
1. a first upper cover plate
2. Clamp apparatus
3. Second upper cover plate
4. Second lower cover plate
5. First lower cover plate
6. Cutting tool
7. Visual observation device
8. Display device
9. Optical fiber segment with coating layer
9a. stripping the coating layer of the optical fiber section
10. Actuator
11. Top pressing block
12. Lighting lamp
14. Stress region of optical fiber
15. Translation stage body
16. Lifting adjusting frame
17. Connecting piece
18. Reference surface of optical fiber cutting platform
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted. It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It should also be noted that, unless specified otherwise, the terms "connected," "mounted," and "disposed" herein may mean not only directly connected, mounted, or disposed, but also indirectly connected, mounted, or disposed with an intervening member. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.
The cutting device fitting for the special optical fiber provided in the specification can be suitable for being matched with the existing optical fiber cutting device. The structure and construction of the optical fiber cleaving device, which is known to those skilled in the art, is not the subject of the invention of the present application, and is used only by way of simple reference and description, and will not be described in detail herein.
Hereinafter, a cutting device fitting for a special optical fiber according to an embodiment of the present invention will be described by way of example with reference to the accompanying drawings.
Fig. 1 is a side view schematically showing the construction of a cutting device for a special optical fiber according to an embodiment of the present invention. As shown in this view, in the cutting device assembly for specialty optical fibers according to the present disclosure, the cutting device assembly includes a visual observation device 7, an adjustable translation stage (not shown), a clamp 2, and an ejector. In addition, the cutting device used in the cutting device assembly of the embodiment of the present invention may include the cutter 2, a one-dimensional translation stage (not shown), and the like.
The clamp 2 is used for being installed in a groove parallel to the optical fiber placing direction of a one-dimensional translation table of the cutting device in a releasable mode and used for clamping and locking one end of the optical fiber to be cut. The one-dimensional translation stage of the cleaving device may include two portions, each of which may include a slot, e.g., a first slot and a second slot, respectively, and both ends of the optical fiber may be secured by means of a cover plate, etc., respectively, of the two portions, which may then be moved toward the two ends to apply tension to the optical fiber. In the prior art, the first groove and the second groove can be used for directly placing two ends of a thicker optical fiber to be cut respectively. In the embodiment of the present invention, one groove (e.g., the first groove) of the one-dimensional translation stage may be used for placing the above-mentioned clamp 2, and the clamp 2 includes a groove for placing the coated optical fiber segment of the optical fiber to be cut; another groove (e.g., a second groove) may be used to place a segment of the fiber to be cleaved after stripping the coating. In this way, the clamp 2 can be used to clamp and lock the coated optical fiber segment of the optical fiber, and the clamp is fixed in one groove of the one-dimensional translation stage, and the coated optical fiber segment can be clamped and locked in the other groove of the one-dimensional translation stage.
The clamp 2 may be implemented by using an existing clamp or by itself, and may be a fusion splicer transfer clamp, for example. Specifically, the clamp 2 may be provided with a semicircular groove, the radial dimension of which may be equivalent to the radial dimension of the optical fiber to be cut, so as to facilitate both the insertion and accommodation of the optical fiber segment and the axial rotation of the optical fiber; in addition, the clamp 2 can be provided with its own cover plate which can magnetically cover and press the optical fiber, thereby locking the optical fiber (before locking, the optical fiber can be manually axially rotated).
The visual observation device 7 is mounted on the lifting adjusting frame 16 of the adjustable translation stage and can be used to observe the part to be cut of the optical fiber to be cut. The visual observation device 7 may be an optical microscope or a digital microscope. In the case where the visual observation device 7 is a digital microscope, the magnification of the digital microscope may be not less than 8 times in order to clearly observe the optical fiber.
In addition, the portion to be cut of the optical fiber to be cut may be a portion between two grooves of the one-dimensional translation stage. The adjustable translation stage may be configured to be movable in the fiber placement direction and the perpendicular fiber placement direction, and specifically, may include a translation stage body 15 and a lift adjustment bracket 16, and the lift adjustment bracket 16 may be fixed to the translation stage body 15. Can realize the upper and lower regulation of vision observation device 7 through this lift adjustment frame 16 to the focusing of vision observation device 7, can realize through this translation platform body 15 that vision observation device 7 is placing the direction regulation along the optic fibre, can also realize that vision observation device 7 keeps away from or is close to the regulation of waiting to cut the optic fibre in the horizontal direction. The height of the lifting adjusting frame 16 can be adjusted to meet the focusing requirement of the visual observation device 7, for example, the height of the lifting adjusting frame can be within a range of not less than 35 mm.
The ejector includes an ejector block 11 and an actuator 10 for driving the ejector block 11 to apply an ejecting force toward the optical fiber to be cut. The pressing block 11 is installed at the moving part of the actuator 10 and used for pressing and cutting the pre-cutting position of the optical fiber to be cut after the optical fiber to be cut is pre-cut by the cutter 6 of the cutting device, so as to break the optical fiber to be cut.
The top press block 11 may be of various available shapes, for example, a cylindrical top block. In other embodiments may be a cuboid shaped top piece. In addition, the end of the pressing block 11 for pressing may be in the shape of a hemisphere, a truncated pyramid, or the like. Further, the surface of the press-against block 11 may have a roughness, for example, not more than 1.6, so as to prevent deviation from the press-against position when pressing the optical fiber.
The actuator 10 may be a piezoelectric actuator or a voice coil motor, whereby the displacement of the top press block 10 can be adjusted with higher accuracy. The stroke of the piezoelectric actuator may be greater than 200 microns, and more specifically, may be greater than 400 microns.
As shown in fig. 1, the visual observation means may also be connected to a display 8. The visual observation device 7 is arranged on a lifting adjusting frame 16 of the adjustable translation table. The adjustable one-dimensional translation stage can be arranged on a support (not shown), and the one-dimensional translation stage can be provided with a clamp for clamping the belt-cut optical fiber.
In some embodiments, the cutting device to which the cutting device assembly is applied may include a first cover plate on the left side and a second cover plate on the right side in fig. 1. The first cover plate may comprise a first upper cover plate 1 and a first lower cover plate 5, which in this example may comprise a second upper cover plate 3 and a second lower cover plate 4. The first cover plate may also be provided with a clamp 2 therein. The clamp can be arranged in a groove between a first upper cover plate 1 and a first lower cover plate 5 of a one-dimensional translation table in a releasable mode and is used for clamping and locking a clamp 2 for clamping a coated optical fiber section 9 of an optical fiber to be cut, a second upper cover plate 3 and a second lower cover plate 4 can be used for clamping and locking a coated optical fiber section 9a of the optical fiber to be cut, and the movable mode of the one-dimensional translation table is set to be parallel to the optical fiber placing direction.
The visual observation device 7 is mounted on a lifting adjusting frame 16 of the adjustable translation stage and can be set to observe the optical fiber to be cut between the first cover plate and the second cover plate which are longitudinally arranged on the one-dimensional platform. The tool 6 and the visual observation device 7 may be located between the first cover plate and the second cover plate. The cutter 6 may be used to pre-cut the fiber segment 9a based on a predetermined operating control program. The tool and its operating mechanism may be mounted on a support (not shown) and the visual observation device 7 is mounted on a lifting adjustment frame 16. The lifting adjustment frame 16 may be, for example, an adjustable one-dimensional lifting screw. The visual observation device 7 may also be mounted to the lifting adjustment frame 16 via a connection 17 (as shown in fig. 4). The cutter 6 and the visual observation device 7 may be configured to be rotatable around the optical fiber to be cut after being in place by means of a connecting member 17. An ejector may be disposed between the first cover plate and the second cover plate. The ejector includes, in this example, an ejector block 11 and an actuator 10 for driving the ejector block to apply an ejecting force toward the optical fiber.
The visual observation device 7 may be a digital microscope in the example shown in the drawing, wherein the visual observation device 7 may be a high-definition camera, and the display 8 connected to the visual observation device 7 may be a liquid crystal display. The visual observation device 7 may also be an optical microscope, a digital microscope or other observation device. Wherein, the objective lens of the optical microscope or the camera of the digital microscope can be arranged on the lifting adjusting frame.
FIG. 2 is a side view of a cutting device for specialty optical fibers, showing a cutting device assembly according to another embodiment of the present invention. Fig. 3 shows a partially enlarged schematic view of another perspective encircled by a dotted line in fig. 2. Fig. 4 is a schematic end view showing the construction of a fitting of a cutting device for a special optical fiber according to an embodiment of the present invention shown in fig. 2 when used in conjunction with the cutting device.
In one embodiment of the cutting device assembly, the ejector may comprise an ejector block 11 and an actuator 10 for driving the ejector block to apply an ejecting force to the optical fiber, the ejector block 11 being mounted on a moving part of the actuator for ejecting the pre-cut position of the optical fiber after the optical fiber is pre-cut by the cutter 6 to break the optical fiber. For example, the top pressing block 11 may be bonded to the moving part of the actuator 10 by a strong adhesive.
The actuator 11 may be a piezoelectric actuator or a voice coil motor, or other micron-scale actuator, as long as the actuator 11 can drive the top press block in a stepwise micron-scale movement. The actuator 11 may be a piezoelectric actuator and the top mass 11 may be a cylindrical top mass. Wherein the stroke of the piezoelectric actuator may be larger than 200 microns, preferably, the stroke of the piezoelectric actuator may be larger than 400 microns.
As shown in fig. 2 and 3, a lighting lamp 12 with adjustable luminous power can be further disposed between the first cover plate including the first upper cover plate 1 and the first lower cover plate 5 and the second cover plate including the second upper cover plate 3 and the second lower cover plate 4.
Alternatively, the clamp 2 may be a fusion splicer transfer clamp, and the cutter 6 may be an existing 200/400 core diameter type fiber cutter, or other type of diamond cutter.
In a preferred embodiment, the jig 2 is preferably a transfer jig for a large core fusion splicer. Wherein the moving distance of the one-dimensional translation stage is not less than 25 mm; the lifting adjustable height of the lifting adjusting frame is not less than 35 mm; the magnification of the digital microscope is not less than 8 times; the fixed height and the rotation of the digital microscope on the lifting adjusting frame can be adjusted through the clamping piece; the surface roughness of the cylindrical top block is required to be not more than 1.6.
The cutting device accessory of each embodiment of the invention is particularly suitable for cutting special optical fibers. For example, a micrometer installed in the existing cutting device is replaced by the top pressing block and the brake in the embodiment of the invention, a groove in front of the first upper cover plate 1 and the first lower cover plate can be replaced by a clamp in which the optical fiber in the embodiment of the invention is placed, and in addition, a translation table body of an adjustable translation table can be installed on one side of the optical fiber, which is far away from the original micrometer. In addition, the existing cutting device, the adjustable translation stage of the embodiment of the present invention, and the like may be installed on the same base platform (e.g., the optical fiber cutting platform datum plane 18).
For example, the conventional optical fiber cutting apparatus generally includes a microscope, an LED point light source, a connecting member 17, an adjustable rotary stage (a translation stage body 15), a lifting/lowering adjusting frame 16, and the like. The center line of the visual axis of the platform is adjustable, and the central visual axis can pass through the fiber core of the optical fiber to be cut through calibration and is vertical to the feed position of the diamond cutter. The optical fiber cutting device usually comprises a large-core-diameter optical fiber cutting knife, the large-core-diameter optical fiber cutting knife comprises a diamond cutting blade, a flexible LED point light source, a microscope, a display connected with the microscope and a 45-degree reflector. The soft part of the front end of the LED point light source is attached to the held optical fiber, the 45-degree reflecting mirror surface and the end face of the optical fiber form a 45-degree angle, the microscope and the optical fiber form a 90-degree angle, the central visual axis vertically penetrates through the center of the optical fiber, the microscope is connected with the display and the measuring equipment, the diameter of the optical fiber can be measured, the point light source is located under the optical fiber, and the cutting direction of the diamond cutter entering the cutter and the visual axis of the microscope form a 90-degree angle.
In the equipment, the device can be used for clamping and locking an optical fiber section or clamping a left optical fiber coating layer upper cover plate, a left optical fiber coating layer lower cover plate, a right bare optical fiber layer upper cover plate and a right bare optical fiber lower cover plate of a clamp of the optical fiber section, and a corresponding locking mechanism, a diamond cutting blade, a digital display micrometer, a control motor and a corresponding control circuit. The upper cover plate and the lower cover plate of the left coating layer are placed on the left rotary clamp, and can rotate 160 degrees or 360 degrees by taking the placed optical fiber as a strict axis without manually rotating the optical fiber; or the left clamp remains stationary and the fiber to be cut can be manually rotated in the fiber groove. The microscope identifies the side surface or end surface imaging of the optical fiber, the imaging of the side surface and the end surface of the optical fiber is learned and recorded by using the image identification circuit, and the optical fiber is controlled to rotate to the symmetrical angle of the stress area.
Can reform transform the cutting device accessory for special type optic fibre for this disclosure to above-mentioned optic fibre cutting equipment, reform transform diamond cutter wherein into the cutter that accords with the cutting device according to this application, make it can carry out precutting to optic fibre based on predetermined operation control procedure. For example, the method can be realized by changing hardware tools, modifying a machining configuration program, and modifying the cutting feed parameters and the cutting feed times. Preferably, the pre-cutting required can be achieved with existing tools by means of the machining control software only.
The optical fiber is generally subjected to side imaging by using a microscope, and the observation position is located at the optical fiber after the coating layer is stripped; and rotating the optical fiber, and when the stress area of the optical fiber is in a horizontal or vertical position, imaging the side surface of the optical fiber to form a symmetrical structure, and cutting.
The mainstream optical fiber cutting equipment in the current market has poor repeatability of high-quality cutting effect when processing special optical fibers such as polarization maintaining optical fibers, octagonal optical fibers, bow-tie optical fibers, linear optical fibers, photonic crystal optical fibers and the like. The present disclosure provides a novel cutting device for special optical fibers, which realizes cutting with high precision and high repetition rate by adding a series of accessories on the basis of a large-core-diameter optical fiber cutting knife.
For example, in the example shown in fig. 1-4, a cutting device formed in one embodiment of a cutting device accessory according to the present disclosure may include: the device comprises an optical fiber cover plate, a transfer clamp, a fixing piece, a one-dimensional translation table, an adjustable translation table, a clamping piece, a piezoelectric actuator, a cylindrical jacking block, a digital microscope and a display connected with the digital microscope.
The optical fiber clamp (fixture) is arranged on the lower cover plate on the right side of the cutter, the fixing piece is used for fixing the back of the cutter and the one-dimensional translation table, the movable direction of the one-dimensional translation table is parallel to the optical fiber placing direction, the lifting adjusting frame is fixed on the adjustable translation table, the digital microscope is clamped through the clamping piece, and the digital microscope is connected with the display through a data cable; the cylindrical top pressure block 10 is arranged at the front end of the piezoelectric actuator 10, can replace a cutting micrometer and is arranged at the position of the cutting micrometer.
The cutting device can be an LDC200/400 type optical fiber cutter manufactured by Vytran, the clamp 2 can be a transfer clamp of a large-core-diameter optical fiber fusion splicer manufactured by Vytran, and the moving distance of the one-dimensional translation table is not less than 25 mm; the lifting adjustable height of the lifting adjusting frame is not less than 35 mm; the magnification of the digital microscope is not less than 8 times; the fixed height and the rotation of the digital microscope on the lifting adjusting frame can be adjusted through the clamping piece; the stroke of the piezoelectric actuator is not less than 400 microns, the moving part of the piezoelectric actuator is bonded with the cylindrical top block through the super glue, the cylindrical top block is used for pushing the optical fiber, and the requirement of surface roughness is not more than 1.6.
The actuator for driving the jacking block is preferably a piezoelectric actuator, and the gradual jacking is realized by gradually adjusting the voltage. It will be appreciated that in other embodiments, the voice coil motor may be implemented in conjunction with a precision rack and pinion.
In addition, the embodiment of the invention also provides a cutting device for the special optical fiber, which comprises the cutting knife device accessory in any embodiment, the one-dimensional translation table and the cutter. The specific implementation of the cutting device accessory and the matching manner of the cutting device accessory with the one-dimensional translation table and the cutter can be implemented by referring to the related contents in the above embodiments, and repeated descriptions are omitted.
The cutting device according to the present disclosure is clearly different from the cutting methods and mechanisms in the existing devices: the optical fiber is cut by the ejector in cooperation with a small pulling force. Before the optical fiber is subjected to top breaking, the optical fiber is subjected to multiple pre-cutting by utilizing a cutter to form a flaw on the optical fiber, then the optical fiber is subjected to micron-scale top pressing by utilizing a top block of a top breaker which is abutted against the optical fiber, and finally the optical fiber is completely broken by utilizing the brittleness of the optical fiber. The optical fiber in the present disclosure is cleaved by means of top breaking, if not by pulling.
In addition, the embodiment of the invention also discloses an optical fiber cutting method which can be realized by using the cutting device in any one of the embodiments. Specifically, the optical fiber cutting method may include the steps of:
s1: installing a clamp in a first groove of a one-dimensional translation table, clamping an optical fiber section with a coating layer of an optical fiber to be cut by utilizing the clamp, and placing the optical fiber section with the coating layer removed of the optical fiber to be cut in a second groove;
s2: adjusting the position of the adjustable translation table and the lifting adjusting frame thereof to enable the visual observation device to clearly image the side surface of the cutting part of the optical fiber to be cut;
s3: before the clamp locks the optical fiber to be cut in place, manually pressing the optical fiber section with the optical fiber coating layer, manually rotating other parts of the optical fiber to be cut until a specific symmetrical image appears in side imaging of the cutting part of the optical fiber to be cut by the visual observation device, and locking the clamp;
s4: respectively covering and sealing the clamp and the optical fiber section of the optical fiber to be cut, of which the coating layer is stripped, by using a first cover plate and a second cover plate of the cutting device;
s5: adjusting the control voltage of the actuator, and controlling the top pressing block to reach a position away from the part to be cut of the optical fiber to be cut by a set length;
s6: starting a cutting program, and utilizing a cutter to complete pre-cutting of the part to be cut of the optical fiber to be cut for preset times;
s7: and gradually adjusting the voltage of the actuator to enable the jacking block to slowly jack the pre-cutting position of the optical fiber to be cut until the optical fiber to be cut is broken.
In step S1, the clamp may be a transfer clamp of the fusion splicer, the first slot may be located between the first upper cover plate 1 and the first lower cover plate 2, and the second slot may be located between the second upper cover plate 3 and the second lower cover plate 4.
In step S2, the position of the visual observation device in the optical fiber placement direction and the distance between the visual observation device and the optical fiber may be adjusted by adjusting the translation stage body of the adjustable translation stage. The focusing position of the visual observation device can be adjusted by adjusting the lifting adjusting frame of the adjustable translation stage, so that the optical fiber can be clearly imaged in the visual observation device.
In the step S3, when the clamp is not locked, the optical fiber placed in the groove of the clamp can rotate axially, at this time, one hand can press the optical fiber section with the optical fiber coating layer to prevent the optical fiber from coming out of the clamp groove, the other hand can rotate the optical fiber at other parts of the optical fiber, and at the same time, the imaging of the optical fiber in the visual observation device can be observed, when a specific symmetrical image appears in the side imaging of the cutting part of the optical fiber to be cut, the stress area of the optical fiber corresponds to a horizontal or vertical state, at this time, the clamp is locked to fix the optical fiber, so that the pressing block can apply uniform pressing force to the optical fiber.
In step S4, the first cover plate may refer to the first upper cover plate 1 and the first lower cover plate 5 of the existing cleaving apparatus, the second cover plate may refer to the second upper cover plate 3 and the second lower cover plate 4 of the existing cleaving apparatus, the clamp (transfer clamp) for locking the coated optical fiber section of the optical fiber may be clamped by the first upper cover plate 1 and the first lower cover plate 5 (first cover plate), and the coated optical fiber section of the optical fiber may be clamped by the second upper cover plate 3 and the second lower cover plate 4 (first cover plate).
Prior to this step S6, the optical fiber may be tensioned with a certain amount of force by manipulating the one-dimensional translation stage to pre-cut and crimp. Alternatively, the pre-cutting of the portion to be cut of the optical fiber to be cut by the cutter in step S6 is completed for a predetermined number of times, that is, the pre-cutting process includes tensioning the optical fiber by the one-dimensional translation stage and then performing the pre-cutting process. In addition, the implementation manner of step S6 may be similar to the cutting process of the existing cutting device, and the main difference is that in this embodiment, the number of times of cutting may be small, the cutting force may be small, and the optical fiber is not directly cut off by using a cutter.
In this embodiment, the cleaned optical fiber can be placed on the fixture, and the getter pump is started to adsorb the optical fiber; adjusting the lifting adjusting frame to control the focusing of the microscope, so that the side surface of the optical fiber can be imaged clearly; when the optical fiber is rotated manually, the optical fiber coating layer part is pressed by a finger, the optical fiber is rotated by the other hand, the side surface is observed for imaging, until a specific symmetrical image appears, the stress area is correspondingly in a horizontal or vertical state, and the optical fiber is locked by a transfer clamp; adjusting the control voltage of the piezoelectric actuator, and controlling the position of the cylindrical top block away from the optical fiber to be just capable of making the optical fiber retreat in the cutting process; and starting a cutting program to finish cutting for a preset number of times, and gradually adjusting the voltage of the piezoelectric actuator again to enable the cylindrical jacking block to slowly jack the optical fiber, so that the optical fiber is broken to finish cutting off the optical fiber.
Further, the optical fiber cutting method according to the above embodiment may further include: if the cutting optical fiber is broken for a preset number of times, reducing the advancing value or cutting times of the cutter; if the cutting angle of the optical fiber is large and the end face has no tail, the control voltage of the actuator is reduced; if the cutting angle of the optical fiber is small and the end face is trailing, reducing the pulling force or the pulling force stepping amount; if the cut end face of the optical fiber has obvious knife edge or broken edge, the pre-feeding amount, the cutting stepping amount and the cutting times of the optical fiber are reduced.
As several situations occur simultaneously, one of the conditions is modified and the optical fiber is cut according to the adjusted parameters, so that various problems which may occur can be solved respectively.
Hereinafter, practical experimental effects using the cutting apparatus according to the present disclosure will be exemplified with reference to the accompanying drawings.
Example 1:
the cutting device in the optical fiber cutting device shown in fig. 1 may include a left upper cover plate (a first upper cover plate 1), a fixture 2, a right upper cover plate (a second upper cover plate 3), a right lower cover plate (a second lower cover plate 4), a left lower cover plate (a second lower cover plate 5), a cutting knife (a cutter 6), a digital microscope (a visual observation device 7), a display 8, an optical fiber to be cut (including an optical fiber section 9 with a coating layer and an optical fiber section 9a with the coating layer removed), a brake (a piezoelectric actuator 10), a top press block 11 (a cylindrical top block), and the like. Wherein, the clamp can adopt a Vytran 3600 fusion splicer transfer clamp, the diameter of the clamp optical fiber groove is matched with the optical fiber to be cut, if the diameter of the optical fiber coating layer is 550 micrometers, the transfer clamp selects 500 models; the cutter may be a diamond cutting blade; the digital microscope can be an ultra-ocular B11+ L1000 lens; the optical fiber to be cut can be selected from PLMA-20/400 panda optical fibers of Nufern company; the piezoelectric actuator can be selected from PK2FVF1 of Soranbo, USA with the maximum displacement of 420 microns and the control voltage of 0-75V; the cylindrical top piece may be made of 304 stainless steel and may have a surface roughness of 1.6. Wherein, the cutter can be a Vytran LDC 400 type optical fiber cutter.
The feeding direction of the diamond cutter is ensured to be strictly vertical to the central visual axis of the microscope lens. Selecting a corresponding cutting program, starting a vacuum air suction pump, adsorbing the optical fiber with the coating layer stripped on the lower cover plate, and focusing a microscope to enable the optical fiber to form an image on the upper side surface of the display; the optical fiber is rotated manually, so that the side features of the optical fiber are distributed in a specific symmetrical mode, namely, the characteristic region (stress region) of the optical fiber is in a horizontal or vertical symmetrical position relative to the cutting knife entrance, the clamp 2 is installed on the first cover plate, the clamp 2 is used for clamping the optical fiber section with the coating layer of the optical fiber, and the second cover plate is used for clamping the optical fiber section with the coating layer removed and placed on the optical fiber. The fiber diameter is measured and the piezoelectric actuator is pushed up to the end face of the cylindrical top block very close to the fiber and recorded. And starting a cutting program, finishing cutting for 15 times by the cutter, setting the pulling force value to be 800, setting the preset cutter position to be 2526, setting the advancing amount to be 81, setting the retreating amount to be 80, and enabling the optical fiber not to be broken at the moment. And adding 0.01V to the voltage value of the piezoelectric actuator every 10 seconds on the basis of the original value.
Through tests, for the same optical fiber (such as PLMA-20/400 panda), the polarization maintaining optical fiber is rotated in a manual mode, a specific symmetrical image is recorded, the level of a stress area (panda eye) can be controlled within 3 degrees, after the optical fiber is optimized in the mode, the optical fiber is cut for 100 times, no obvious trailing occurs in the stress area, the end face is flat, no obvious knife edge or no obvious notch exists, and the cutting angle is smaller than 0.2 degrees.
Example 2:
in the scheme, a visual optical microscope can be adopted as the microscope, and the side face of the optical fiber is directly observed visually and used for evaluating that the optical fiber is rotated to a specific position, so that the cutting effect similar to that of the embodiment 1 can be obtained. The other configurations are the same as in embodiment 1.
Example 3:
in the scheme, the optical fiber is replaced by an octagonal optical fiber, the optical fiber is rotated to a symmetrical position, other configurations are the same as those in embodiment 1, and the cutting effect similar to that in embodiment 1 can be obtained.
The above description is only presented as an enabling solution for the present invention and should not be taken as a sole limitation on the solution itself.
The optical fiber cut by the invention is selected from a polarization maintaining optical fiber, an octagonal optical fiber, a bow tie optical fiber, a tiger optical fiber, a linear optical fiber, a photonic crystal optical fiber or a large-core optical fiber with the cladding diameter larger than 600 mu m.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In summary, the cutting device accessory for the special optical fiber, the cutting device for the special optical fiber and the optical fiber cutting method provided by the embodiments of the present invention have the significant advantages of good cutting effect, high cutting precision, strong cutting consistency, flexible structure, etc. when used for cutting the special optical fiber.
Claims (10)
1. A cutting device accessory for special optical fibers is characterized by comprising a clamp, a visual observation device, an ejector and an adjustable translation table;
the clamp is arranged in a groove, parallel to the optical fiber placing direction, of a one-dimensional translation table of the cutting device in a releasable mode and used for clamping and locking one end of the optical fiber to be cut;
the visual observation device is arranged on the lifting adjusting frame of the adjustable translation table and is used for observing the part to be cut of the optical fiber to be cut;
the ejector comprises an ejector pressing block and an actuator for driving the ejector pressing block to apply ejecting pressure to the optical fiber to be cut; the jacking block is arranged at the moving part of the actuator and used for jacking and cutting the pre-cutting position of the optical fiber to be cut after the optical fiber to be cut is pre-cut by a cutter of the cutting device so as to break the optical fiber to be cut.
2. The cutting device assembly of claim 1, wherein the actuator is a piezoelectric actuator or a voice coil motor.
3. The cutting device assembly of claim 2, wherein the stroke of the piezoelectric actuator is greater than 400 microns.
4. The cutting device accessory of claim 1, wherein the clamp is a fusion splicer transfer clamp.
5. The cutting device accessory of claim 1, wherein the top press block is a cylindrical top block.
6. The cutting device accessory of any one of claims 1 to 5, wherein the visual observation device is an optical microscope or a digital microscope; the adjustable translation stage is configured to be movable in a fiber placement direction and a perpendicular fiber placement direction.
7. The cutting device accessory of claim 6, wherein the lift adjustable height of the lift adjustment bracket is not less than 35 mm; the magnification of the digital microscope is not less than 8 times; the surface roughness of the top compact is not more than 1.6.
8. A cleaving device for specialty optical fibers, comprising: the one-dimensional translation stage, the cutter, and the cutting device assembly of any one of claims 1-7.
9. A method for cleaving an optical fiber, adapted for use with the cleaving device of claim 8, the method comprising the steps of:
installing a clamp in a first groove of a one-dimensional translation table, clamping an optical fiber section with a coating layer of an optical fiber to be cut by utilizing the clamp, and placing the optical fiber section with the coating layer removed of the optical fiber to be cut in a second groove;
adjusting the position of the adjustable translation table and the lifting adjusting frame thereof to enable the visual observation device to clearly image the side surface of the cutting part of the optical fiber to be cut;
before the clamp locks the optical fiber to be cut in place, manually pressing the optical fiber section with the optical fiber coating layer, manually rotating other parts of the optical fiber to be cut until a specific symmetrical image appears in side imaging of the cutting part of the optical fiber to be cut by the visual observation device, and locking the clamp;
respectively covering and sealing the clamp and the optical fiber section of the optical fiber to be cut, of which the coating layer is stripped, by using a first cover plate and a second cover plate of the cutting device;
adjusting the control voltage of the actuator, and controlling the top pressing block to reach a position away from the part to be cut of the optical fiber to be cut by a set length;
starting a cutting program, and utilizing a cutter to complete pre-cutting of the part to be cut of the optical fiber to be cut for preset times;
and gradually adjusting the voltage of the actuator to enable the jacking block to slowly jack the pre-cutting position of the optical fiber to be cut until the optical fiber to be cut is broken.
10. The optical fiber cleaving method of claim 9, further comprising:
if the cutting optical fiber is broken for a preset number of times, reducing the advancing value or cutting times of the cutter;
if the cutting angle of the optical fiber is large and the end face has no tail, the control voltage of the actuator is reduced;
if the cutting angle of the optical fiber is small and the end face is trailing, reducing the pulling force or the pulling force stepping amount;
if the cut end face of the optical fiber has obvious knife edge or broken edge, the pre-feeding amount, the cutting stepping amount and the cutting times of the optical fiber are reduced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911344624.4A CN111123433A (en) | 2019-12-24 | 2019-12-24 | Cutting device accessory, cutting device and optical fiber cutting method for special optical fiber |
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| CN201911344624.4A CN111123433A (en) | 2019-12-24 | 2019-12-24 | Cutting device accessory, cutting device and optical fiber cutting method for special optical fiber |
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