CN209823097U - Optical fiber coiling carrier, optical fiber coiling structure and optical fiber laser - Google Patents
Optical fiber coiling carrier, optical fiber coiling structure and optical fiber laser Download PDFInfo
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- CN209823097U CN209823097U CN201921200974.9U CN201921200974U CN209823097U CN 209823097 U CN209823097 U CN 209823097U CN 201921200974 U CN201921200974 U CN 201921200974U CN 209823097 U CN209823097 U CN 209823097U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 146
- 239000000835 fiber Substances 0.000 claims abstract description 80
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- 238000002310 reflectometry Methods 0.000 claims description 18
- 230000004927 fusion Effects 0.000 claims description 14
- 238000007526 fusion splicing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 17
- 238000003466 welding Methods 0.000 description 20
- 230000000670 limiting effect Effects 0.000 description 15
- 238000005253 cladding Methods 0.000 description 12
- 230000002829 reductive effect Effects 0.000 description 11
- 239000000243 solution Substances 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
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- 230000005540 biological transmission Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 1
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- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The application provides an optical fiber coiling carrier, an optical fiber coiling structure and a laser. The optical fiber coiling carrier comprises a body and an optical fiber coiling channel arranged on the body; the optical fiber coiling channel comprises a first coiling section and a second coiling section; the first coiling section is spirally arranged around the second coiling section, and one end of the first coiling section, which is close to the second coiling section, is communicated with the second coiling section; the thread pitch of the first coil section is gradually increased from inside to outside. In this application, be the heliciform setting around the second coil section through making first coil section, and first coil section is close to the one end and the second coil section intercommunication of second coil section, the screw thread interval of first coil section is by interior toward outer crescent, has slowed down the pump light and has leaked the volume, reduces the thermal effect that optic fibre produced because the pump light of revealing. Thereby accommodating more pump light power.
Description
Technical Field
The application relates to the technical field of fiber lasers, in particular to an optical fiber coiling carrier, an optical fiber coiling structure and a laser.
Background
The fiber laser is a laser using an optical fiber as a working medium. At present, optical fiber coiling runways on optical fiber lasers are mostly coiled inwards in sequence in a concentric circle mode, and a small part of optical fiber coiling runways also have an oval or annular structure, and the common point of the optical fiber coiling runways is that the runways are all equidistant. Referring to fig. 1, fig. 1 shows an optical fiber wound around a raceway with a curvature radius gradually decreasing in a concentric manner. The optical fiber is wound around an optical fiber placed on the runway to convert the pump light into laser light. However, the pump light in the fiber cladding leaks out to different degrees, and as the radius of curvature of the fiber winding track becomes smaller, the power of the pump light leaking out from the fiber becomes larger. The leaked pump light power heats the fiber. When the leaked pump laser reaches a certain degree, the optical fiber is burnt, and the reliability of the optical fiber laser is seriously influenced.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the present application is to provide an optical fiber coiling carrier, an optical fiber coiling structure and a laser, which are used for reducing the leakage degree of pump light and reducing the thermal effect of the optical fiber generated by the leaked pump light.
The utility model discloses a realize like this:
in a first aspect, the embodiment of the present application provides an optical fiber coiling carrier, which includes a body and an optical fiber coiling channel opened on the body; the optical fiber coiling channel comprises a first coiling section and a second coiling section; the first coiling section is spirally arranged around the second coiling section, and one end of the first coiling section, which is close to the second coiling section, is communicated with the second coiling section; the thread pitch of the first coil section is gradually increased from inside to outside.
Since the pump light is gradually converted into laser light as the length of the optical fiber coil increases, the residual pump light in the optical fiber cladding is gradually reduced at the end of the optical fiber, and the leakage amount is also gradually reduced. Therefore, the leakage phenomenon of the pump light is mainly exhibited at the front end of the optical fiber winding. Therefore, in this application, be the heliciform setting around the second coiling section through making first coiling section, and first coiling section is close to the one end and the second coiling section intercommunication of second coiling section, the screw thread interval of first coiling section is by interior toward outer crescent, has slowed down the pump light and has leaked the volume, reduces the optical fiber because the pump light who leaks and the thermal effect that produces. Thereby accommodating more pump light power.
In combination with the technical solution provided by the first aspect, in some possible implementations, the optical fiber coiling channel further includes a welding section, and the welding section is communicated with the other end of the first coiling section.
In this application, the fusion splicing section is used for placing the fusion splicing part of the optical fiber, and the protection of the fusion splicing point of the optical fiber is enhanced.
In combination with the technical solution provided by the first aspect, in some possible implementations, the welding section is linear.
The fusion point of the optical fiber has a quantum defect effect, which easily causes the point to be heated, and process noise is inevitably introduced because the point is fused, so that the point is relatively weak. Therefore, the welding section is arranged in a straight line shape, so that the bending of the welding point is avoided, and the protection of the welding point is enhanced. The second fusion point also serves as the absorption starting point of the pump light, i.e., the injection point of the pump light, and the point contains the most pump light. Therefore, the welded part of the optical fiber is arranged on the welding section in a straight line shape, the leakage amount of the pump light at the point can be minimized, and the heat effect of the optical fiber caused by the leaked pump light is reduced.
In combination with the technical solution provided by the first aspect, in some possible implementations, the body is in a dish shape and includes a first surface and a second surface that are opposite to each other, and the optical fiber coiling channel is opened on the side of the first surface.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the body includes a disc-shaped portion and a cylindrical portion, the first coiled section is provided on the disc-shaped portion around the cylindrical portion, and the second coiled section is provided on an outer side wall of the cylindrical portion.
In this application, this body includes dish form portion and column portion, because column portion external diameter is the same, consequently sets up the second on the lateral wall of column portion, has guaranteed that the diameter of the optic fibre of coiling in the second coiling section is unchangeable, realizes the second and coils the ability of section continuous mode selection, suppression mode degradation.
With reference to the technical solution provided by the first aspect, in some possible implementations, the columnar portion is a cylinder.
In the application, the columnar part is a cylinder, and the effect of continuous mode selection and mode degradation inhibition is better.
In combination with the technical solution provided by the first aspect, in some possible implementation manners, a groove wall of the second coiling section is further provided with a limiting groove.
In this application, still be provided with the spacing groove on the cell wall of second coiling section, can inject optic fibre and take place radial movement, be difficult to produce the problem that optic fibre bursts apart.
In a second aspect, embodiments of the present application provide an optical fiber coiling structure, including an optical fiber coiling carrier as provided in the first aspect above, and an optical fiber coiled on the optical fiber coiling carrier.
In a third aspect, embodiments of the present application provide a fiber laser, including a first pump source, a buncher, an oscillator, and a first gain fiber wound on a fiber winding carrier as provided in the first aspect above; one end of the first gain optical fiber is connected with the buncher, and the other end of the first gain optical fiber is connected with the oscillator.
With reference to the technical solution provided by the third aspect, in some possible implementations, the oscillator includes a second pump source, a low-reflectivity fiber grating, a high-reflectivity fiber grating, and a second gain fiber wound on the fiber winding carrier provided by the first aspect; one end of the second gain fiber is connected with one end of the low-reflectivity fiber grating; the other end of the second gain fiber is connected with the high-reflectivity fiber grating; and the other end of the low-reflectivity fiber grating is connected with the first gain fiber.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an optical fiber coiling carrier in the prior art.
Fig. 2 is a schematic structural diagram of an optical fiber coiling carrier according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of another optical fiber coiling carrier according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a second coiling section and a limiting groove provided in the embodiment of the present application.
Fig. 5 is a schematic structural diagram of another optical fiber coiling carrier according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a fiber laser according to an embodiment of the present application.
Icon: 10-optical fiber coiling carrier; 110-a body; 111-a disc-shaped portion; 112-a columnar portion; 120-a fiber winding channel; 121-a first coil section; 122-a second coiled section; 1121-limit groove; 123-a welding section; 200-fiber laser; 210-a first pump source; 220-a buncher; 230-an oscillator; 231-a second pump source; 232-low reflectivity fiber grating; 233-high reflectivity fiber grating; 234-a second gain fiber; 235-first cladding optically pumped stripper; 240-first gain fiber; 250-laser output port; 260-second cladding optically pumped stripper.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the prior art, most of optical fiber coiling runways on the existing optical fiber lasers are coiled inwards in a concentric circle mode, and a small part of the optical fiber coiling runways also have an oval or annular structure, and the common point of the optical fiber coiling runways is that the runways are all equidistant. Referring to fig. 1, fig. 1 shows an optical fiber wound around a raceway with a curvature radius gradually decreasing in a concentric manner. The optical fiber is wound around an optical fiber placed on the runway to convert the pump light into laser light. However, the pump light in the fiber cladding leaks out to different degrees, and as the radius of curvature of the fiber winding track becomes smaller, the power of the pump light leaking out from the fiber becomes larger. The leaked pump light power heats the fiber. When the leaked pump laser reaches a certain degree, the optical fiber is burnt, and the reliability of the optical fiber laser is seriously influenced.
In view of the above problems, the applicant has conducted research and research to propose the following embodiments to solve the above problems.
Referring to fig. 2, an optical fiber coiling carrier 10 according to an embodiment of the present invention includes a body 110 and an optical fiber coiling groove 120 formed on the body 110. The present application provides an optical fiber coiling carrier 10 for placing optical fibers. Specifically, the optical fiber may be coiled on the optical fiber coiling channel 120 as shown in FIG. 2.
The optical fiber coiling channel 120 includes a first coiling section 121 and a second coiling section 122. The first coiled section 121 is spirally disposed around the second coiled section 122, and one end of the first coiled section 121 close to the second coiled section 122 is communicated with the second coiled section 122. The pitch of the threads of the first coil section 121 increases gradually from the inside to the outside.
Since the pump light is gradually converted into laser light as the length of the optical fiber coil increases, the residual pump light in the optical fiber cladding is gradually reduced at the end of the optical fiber, and the leakage amount is also gradually reduced. Therefore, the leakage phenomenon of the pump light is mainly exhibited at the front end of the optical fiber winding. In this application, be the heliciform setting around second coiling section 122 through making first coiling section 121, and first coiling section 121 is close to second coiling section 122's one end and second coiling section 122 intercommunication, and first coiling section 121's screw thread interval is by interior toward outer crescent, has slowed down the pump light leakage quantity, reduces the thermal effect that optical fiber produced because the pump light of revealing. Thereby accommodating more pump light power.
As an alternative embodiment, the body 110 is dish-shaped and includes first and second opposing surfaces, and the fiber winding channel opens on the first surface side.
Optionally, the shape enclosed by the first winding section 121 is substantially circular, and the pitch of the threads of the first winding section 121 gradually increases from inside to outside, so that the radius of curvature of the first winding section 121 gradually diverges and increases, and by making the shape enclosed by the first winding section 121 substantially circular, the amount of leakage of the pump light can be significantly reduced, that is, the effect of reducing the amount of leakage of the pump light is better.
It is understood that the shape surrounded by the first winding section 121 may be a substantially oval shape, and the pitch of the threads of the first winding section 121 gradually increases from inside to outside, so that the variation degree of the portion of the first winding section 121 located on the major and minor axes of the oval shape becomes large.
Accordingly, the shape enclosed by the first coil section 121 may be other irregular images, such as the shape enclosed by the first coil section 121 changes from a circular shape to an elliptical shape from inside to outside. It should be noted that it is within the scope of the present application as long as the requirement that the pitch of the thread of the first coil section 121 gradually increases from inside to outside is satisfied. Therefore, the application does not give much examples of the specific shape enclosed by the first coil section 121.
In the present application, the second winding section 122 serves as a mode selection region for bending mode selection of the fiber laser. When the optical fiber is coiled from the first coiled section 121 to the second coiled section 122, the pump light in the inner cladding of the optical fiber is gradually converted into laser light, and the laser power is gradually increased. And mode degradation of the laser light also occurs mainly on the second winding portion 122. Therefore, the mode selection performed on the second winding section 122 can play a significant role in the mode selection.
It is understood that the second coiled segment 122 is substantially circular, and the radius of curvature of the second coiled segment 122 decreases from outside to inside in a concentric circle manner. The shape defined by the second coil section 122 may also be generally oval or irregular. The present application is also not limited thereto.
It should be noted that the shape enclosed by the first winding section 121 and the second winding section 122 in this application may be the same or different. For example, the first winding section 121 may be circular, the pitch of the threads of the first winding section 121 gradually increases from inside to outside, the second winding section 122 may be circular, and the radius of curvature of the second winding section 122 gradually decreases from outside to inside in a concentric circle manner. Alternatively, the first coiled section 121 may be circular, and the second coiled section 122 may be elliptical. It is also possible that the first coil section 121 encloses an elliptical shape and the second coil section 122 encloses a circular shape.
As a specific example, if the optical fiber coiling carrier 10 is applied to a 4 kw optical fiber laser, the first coiling section 121 may be distributed at 18 cm to 30 cm from inside to outside, that is, the first coiling section 121 in the present application is 18 cm to 30 cm from inside to outside, starting from the center of the disc-shaped body 110. The pitch of the threads of the first winding section 121 gradually increases from inside to outside, and may be gradually increased from 1 cm to 3 cm, that is, the pitch of the threads of the first winding section 121 gradually changes from 1 cm inside to 3 cm. While the second coiled section 122 may be distributed from inside to outside by 9 cm to 18 cm, i.e. starting from the center of the dish-shaped body, from inside to outside, 9 cm to 18 cm being the second coiled section 122 in this application. The first coiled section 121 is spirally disposed around the second coiled section 122, and one end of the first coiled section 121 near the second coiled section 122 is communicated with the second coiled section 122. The pitch of the threads of the second winding section 122 is the same, and the pitch of the threads of the second winding section 122 can be set in a range of 1 mm to 2 mm, such as 1.5 mm or 1.9 mm for the pitch of the threads of the second winding section 122. It will be appreciated that the parameters to which the optical fibre coiling carrier 10 is set will be different for fibre lasers of different powers. The specific parameters of the optical fiber coiling carrier 10 placed in the 4 kw optical fiber laser are shown above, and for other optical fiber lasers, the parameters set by the optical fiber coiling carrier 10 can be set according to the actual situation, and are not limited herein.
Although the disc-shaped coiling structure is adopted, the mode selection is performed through the optical fiber coiled in the second coiling section 122, so that the remarkable mode selection effect can be achieved. However, the disc-shaped coiling structure is adopted, the coiling radius of the optical fiber is changed all the time, and the full-section equal-radius mode selection of the optical fiber cannot be realized. Therefore, as an alternative embodiment, the body includes a dish portion 111 and a column portion 112 (as shown in fig. 3), the first coiled section 121 is opened on the dish portion 111 around the column portion, and the second coiled section 122 is opened on the outer side wall of the column portion 112.
Since the outer diameter of the columnar portion 112 is the same, the second coiled section 122 is provided on the outer side wall of the columnar portion 112, so that the coiled diameter of the optical fiber coiled in the second coiled section 122 is ensured to be constant, and the capabilities of continuously selecting the mode and suppressing mode degradation of the second coiled section 122 are realized.
The columnar portion 112 is a cylindrical body, and the optical fiber is wound around the cylindrical body, whereby the effect of continuous mode selection and suppression of mode degradation is more excellent.
It will be appreciated that the cylindrical portion may be a prism, such as a triangular prism or a quadrangular prism, in addition to a cylinder. The upper and lower surfaces of the columnar portion 112 may be disposed in parallel or may be disposed in non-parallel. The number of the components is not limited to this.
The second winding section 122 is spirally arranged along the axial direction of the cylindrical portion. The winding of the optical fiber on the cylindrical portion 112 is facilitated by the optical fiber winding channel 120 of the second winding section 122, preventing the optical fiber from slipping.
Since the optical fiber is wound around the columnar portion 112, the winding generates an outward radial tension, which easily causes the optical fiber to be aged or broken, and it is difficult to achieve effective use for a long period of time. Therefore, as an alternative embodiment, a limit groove is further provided on the groove wall of the second coil section 122. The limiting groove is used for preventing the optical fiber from moving radially.
When the optical fiber is mounted, the optical fiber is mounted inside the stopper groove and spirally arranged from the bottom to the top of the columnar portion 112. By installing the optical fiber in the limiting groove, the optical fiber can be prevented from being aged or broken due to outward radial tension generated by coiling. Meanwhile, the outer diameter of the columnar part 112 is the same, so that the optical fiber coiling diameter in the mode selection length is kept unchanged, and the capabilities of continuously selecting the modes and inhibiting mode degradation of the coiling section are realized.
The second winding portion 122 and the limiting groove will be described with reference to the specific drawings. Referring to fig. 4, fig. 4 shows a structure of two adjacent grooves of the second winding section 122, and the limiting groove 1121 is disposed on a groove wall of the second winding section. During installation, the optical fiber is placed in the limiting groove 1121 through the second coiled section, so that the groove wall of the limiting groove 1121 is in full contact with the optical fiber. The groove wall of the limiting groove 1121 plays a good limiting role for the optical fiber.
In this application, the cross section of the limiting groove 1121 is square, that is, an included angle of 90 degrees is formed between the side wall of the limiting groove 1121 and the bottom of the limiting groove 1121. The cross-sectional square of the position-limiting groove 1121 may be a square or a rectangle, and is not limited herein. In other embodiments, the cross-section of the position-limiting groove 1121 may also be semicircular. In other embodiments, the side wall of the position-limiting groove 1121 and the bottom of the position-limiting groove 1121 may form other angles, for example, the angle formed by the side wall of the position-limiting groove 1121 and the bottom of the position-limiting groove 1121 is 100 degrees or 120 degrees.
As an alternative embodiment, the optical fiber coiling channel 120 further includes a welding section 123 (shown in fig. 5), and the welding section 123 is communicated with an end of the first coiling section 121 far away from the second coiling section. The fused section 123 is used to place the fused portion of the optical fiber. In the present application, placing the fusion spliced portion of the optical fiber on the fusion splice section 123 enhances protection of the fusion splice point.
Optionally, the fused segment is linear.
It should be noted that, the fusion point of the optical fiber has quantum defect effect, which easily causes the point to heat up, and as the point is fusion-jointed, process noise is inevitably introduced, which causes the point to be relatively weak. Therefore, providing the welding section 123 in a straight line shape avoids bending of the welding point, enhancing protection of the welding point. The second fusion point also serves as the absorption starting point of the pump light, i.e., the injection point of the pump light, and the point contains the most pump light. Therefore, by placing the fusion spliced portion of the optical fiber in the fusion spliced section 123 having a straight shape, the amount of leakage of the pump light at that point can be minimized, and the thermal effect of the optical fiber due to the leaked pump light can be reduced.
It is understood that the fused section 123 may be provided in other shapes such as a curved shape, an S-shape, etc., regardless of the amount of leakage of the pump light at the fused portion. The present application is not limited thereto.
To sum up, the optical fiber coiling carrier 10 that this application embodiment provided is through making first coiling section 121 be the heliciform setting around second coiling section 122, and first coiling section 121 is close to the one end and the second coiling section 122 intercommunication of second coiling section 122, the screw thread interval of first coiling section 121 is by interior inside and outside crescent, has slowed down the pump light leakage quantity, reduces the optical fiber because the pump light who reveals and the heat effect that produces. Thereby accommodating more pump light power. Meanwhile, the optical fiber coiling carrier 10 further comprises the linear welding section 123, so that the protection of the welding point is enhanced, the leakage amount of the pump light at the point is minimized, and the heat effect of the optical fiber generated by the leaked pump light is reduced. In addition, in the present application, the body includes the disc-shaped portion 111 and the column-shaped portion 112, and since the outer diameter of the column-shaped portion 112 is the same, the second winding section 122 is opened on the outer side wall of the column-shaped portion 112, the winding diameter of the optical fiber wound in the second winding section 122 is ensured to be constant, and the capability of continuous mode selection and mode degradation suppression of the second winding section 122 is realized. In addition, a limit groove 1121 is further formed in the groove wall of the second coiling section 122, so that the optical fiber can be limited to move radially, and the problem of optical fiber breakage is not prone to occurring.
The embodiment of the present application further provides an optical fiber coiling structure, which comprises the optical fiber coiling carrier 10 provided in the above embodiment and an optical fiber coiled on the optical fiber coiling carrier 10. When installing, the fusion-splicing point of the optical fiber is firstly placed at the fusion-splicing section 123 of the optical fiber coiling channel 120, and then the optical fiber is sequentially coiled, so that the optical fiber is coiled at the first coiling section 121 and the second coiling section 122 of the optical fiber coiling channel 120.
Referring to fig. 6, the present embodiment further provides a fiber laser 200, which includes a first pump source 210, a buncher 220, an oscillator 230, and a first gain fiber 240 wound on the fiber winding carrier provided in the above embodiments. One end of the first gain fiber 240 is connected to the buncher 220, and the other end of the first gain fiber 240 is connected to the oscillator 230.
It should be noted that the fusion spliced section described in the above embodiments is used to place the fusion spliced portion of the output fiber and the first gain fiber 240 in the bundler in the present embodiment. The fusion point of the output fiber of the buncher 220 and the first gain fiber 240 has a quantum deficit effect, which easily causes the point to heat up, and since the point is fused, process noise must be introduced, causing the point to be relatively weak. Therefore, the welding section is arranged in a straight line shape, so that the bending of the welding point is avoided, and the protection of the welding point is enhanced. The second fusion point also serves as the absorption starting point of the pump light, i.e., the injection point of the pump light, and the point contains the most pump light. Therefore, the welding part is arranged at the welding section in a straight line shape, the leakage amount of the pump light at the point can be minimized, and the heat effect of the optical fiber caused by the leaked pump light is reduced.
In an actual use process, the pump light generated by the first pump source 210 is converged and converged by the beam buncher 220 into the first gain fiber 240, and is amplified by the seed light generated by the oscillator 230 to finally generate the required laser, which is output through the laser output port 250.
Optionally, the laser output port 250 is a quartz glass collimating head. The quartz glass collimating head is used for a laser output interface for high-power optical fiber laser transmission, and has low transmission loss, high bearing power and strong reflection bearing capacity.
Optionally, the oscillator comprises a second pump source 231, a low reflectivity fiber grating 232, a high reflectivity fiber grating 233, and a second gain fiber 234 wound on a fiber coil carrier as provided in the above embodiments. One end of the second gain fiber 234 is connected to one end of the low-reflectivity fiber grating 232, and the other end of the second gain fiber 234 is connected to the high-reflectivity fiber grating 233. The other end of the low-reflectivity fiber grating 232 is connected to a first gain fiber 240.
Optionally, the oscillator further comprises a first cladding optically pumped stripper 235. The other end of the low-reflectivity fiber grating 232 is connected to a first gain fiber 240 via a first cladding pump stripper 235.
It can be understood that the process of converting the pump light into the laser light mainly occurs in the first gain fiber 240. Therefore, for cost saving, the second gain fiber 234 may not be wound on the fiber winding carrier as provided in the above embodiments.
Optionally, the optical fiber laser 200 further includes a second cladding optical pump stripper 260, one end of the second cladding optical pump stripper 260 is connected to one end of the beam combiner, and the other end of the second cladding optical pump stripper 260 is connected to the laser output port 250.
In summary, in the optical fiber laser 200 provided by the present application, since the first gain fiber 240 in the optical fiber laser 200 is wound on the fiber winding carrier 10 in the above embodiment, the leakage amount of the pump light is reduced, and the thermal effect of the gain fiber caused by the leaked pump light is reduced. The maximum output power capability of the fiber laser 200 is improved.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An optical fiber coiling carrier is characterized by comprising a body and an optical fiber coiling channel arranged on the body;
the optical fiber coiling channel comprises a first coiling section and a second coiling section; the first coiling section is spirally arranged around the second coiling section, and one end of the first coiling section, which is close to the second coiling section, is communicated with the second coiling section; the thread pitch of the first coil section is gradually increased from inside to outside.
2. The optical fiber coiling carrier as recited in claim 1, wherein the optical fiber coiling channel further comprises a fusion splicing section in communication with the other end of the first coiling section.
3. The optical fiber coiling carrier as defined in claim 2, wherein the fusion spliced section is linear.
4. The optical fiber coiling carrier as claimed in claim 1, wherein the body is dish-shaped and comprises first and second opposing surfaces, the optical fiber coiling channel opening at the first surface side.
5. The optical fiber coiling carrier of claim 1, wherein the body comprises a dish-shaped portion and a cylindrical portion, the first coiling section opens on the dish-shaped portion around the cylindrical portion, and the second coiling section opens on an outer sidewall of the cylindrical portion.
6. The optical fiber coiling carrier as defined in claim 5, wherein the cylindrical portion is a cylinder.
7. The optical fiber coiling carrier as claimed in claim 5, wherein a limit groove is further arranged on the groove wall of the second coiling section.
8. An optical fiber coiling structure comprising the optical fiber coiling carrier as recited in any one of claims 1 to 7, and an optical fiber coiled in an optical fiber coiling channel of the optical fiber coiling carrier.
9. A fiber laser comprising a first pump source, a buncher, an oscillator and a first gain fiber wound on a fiber winding carrier according to any one of claims 1 to 7; one end of the first gain optical fiber is connected with the buncher, and the other end of the first gain optical fiber is connected with the oscillator.
10. The fiber laser of claim 9, wherein the oscillator includes a second pump source, a low-reflectivity fiber grating, a high-reflectivity fiber grating, and a second gain fiber wound on the fiber winding carrier; one end of the second gain fiber is connected with one end of the low-reflectivity fiber grating; the other end of the second gain fiber is connected with the high-reflectivity fiber grating; and the other end of the low-reflectivity fiber grating is connected with the first gain fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921200974.9U CN209823097U (en) | 2019-07-29 | 2019-07-29 | Optical fiber coiling carrier, optical fiber coiling structure and optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921200974.9U CN209823097U (en) | 2019-07-29 | 2019-07-29 | Optical fiber coiling carrier, optical fiber coiling structure and optical fiber laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209823097U true CN209823097U (en) | 2019-12-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200611A (en) * | 2021-12-23 | 2022-03-18 | 上海海洋大学 | Anti-winding optical fiber assembly |
| CN114361917A (en) * | 2022-01-29 | 2022-04-15 | 中国工程物理研究院激光聚变研究中心 | Cooling structure, laser amplifier and fiber laser |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200611A (en) * | 2021-12-23 | 2022-03-18 | 上海海洋大学 | Anti-winding optical fiber assembly |
| CN114361917A (en) * | 2022-01-29 | 2022-04-15 | 中国工程物理研究院激光聚变研究中心 | Cooling structure, laser amplifier and fiber laser |
| CN114361917B (en) * | 2022-01-29 | 2023-11-07 | 中国工程物理研究院激光聚变研究中心 | Cooling structure, laser amplifier and fiber laser |
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