CN212749310U - Hybrid device with superposed 1 x 2 single-stage isolator and WDM filter - Google Patents
Hybrid device with superposed 1 x 2 single-stage isolator and WDM filter Download PDFInfo
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- CN212749310U CN212749310U CN202021655513.3U CN202021655513U CN212749310U CN 212749310 U CN212749310 U CN 212749310U CN 202021655513 U CN202021655513 U CN 202021655513U CN 212749310 U CN212749310 U CN 212749310U
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Abstract
The utility model relates to a 1X 2 single-stage isolator and superimposed mixing device of WDM wave filter, wherein, mixing device include two optical fiber tail optical fibers and single optical fiber tail optical fiber, the outgoing end of two optical fiber tail optical fibers adjacent with the first end of radial gradual change self-focusing lens Glens and the light path corresponds the setting, the second end of radial gradual change self-focusing lens Glens loop through that film filter, single-stage crystal type WALK OFF isolator core and PMD piece are adjacent with the convex surface end of plano-convex lens and the light path corresponds the setting; the incident end of the single-fiber tail fiber is adjacent to the plane end of the plano-convex lens, and the light path is correspondingly arranged; the diameter of a mode field diverged after the plano-convex lens is matched with the radial gradient self-focusing lens Glens can improve the loss of transmission coupling. The hybrid device formed by superposing the 1 x 2 single-stage isolator and the WDM filter is adopted, wherein the overall size of the device can be effectively reduced by using miniaturized size design, and the hybrid device is widely applied to the field of optical fiber communication.
Description
Technical Field
The utility model relates to an optical fiber communication field especially relates to the optical amplifier field in the small mode field diameter optic fibre, specifically indicates a 1X 2 unit isolator adds mixing device of WDM wave filter.
Background
At present, most of hybrid devices are generally large in size, the types of optical fibers suitable for the hybrid devices are more conventional, and some hybrid devices cannot be suitable for light sources or optical amplifiers which are miniaturized and have high requirements on stability.
Therefore, there is a need in the prior art for a hybrid device solution capable of stacking a single-stage isolator and a WDM filter, which is suitable for a special small mode field diameter optical fiber, and the corresponding size design also needs to be able to compress the overall space of the device more, so as to meet the application requirements of miniaturization and high power stability as much as possible, and to be widely used in an optical path system, an optical fiber passive, an active light source or an optical amplifier that have strict requirements for space.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to overcome the above-mentioned shortcomings in the prior art, and to provide a hybrid device in which a 1 × 2 single-stage isolator and a WDM filter are stacked.
In order to achieve the above object, the present invention provides a hybrid device in which a 1 × 2 single-stage isolator is stacked with a WDM filter, specifically as follows:
the hybrid device with the 1 x 2 single-stage isolator and the WDM filter superposed is mainly characterized in that the hybrid device comprises a double-fiber tail fiber and a single-fiber tail fiber, the emergent end of the double-fiber tail fiber is adjacent to the first end of a radial gradient self-focusing lens Glens, the light path of the double-fiber tail fiber is correspondingly arranged, and the second end of the radial gradient self-focusing lens Glens is adjacent to the convex end of a plano-convex lens through a thin film filter, a single-stage crystal WALK OFF isolator core and a PMD sheet in sequence, and the light path of the radial gradient self-focusing lens Glens is correspondingly arranged; and the incident end of the single-fiber tail fiber is adjacent to the plane end of the plano-convex lens, and the light path is correspondingly arranged.
Preferably, the polishing angle of the end face of the emergent end of the double-fiber pigtail is 8 degrees, and the double-fiber pigtail is provided with an 980/1550nm antireflection film layer.
Preferably, the polishing angle of the end face of the first end of the radially graded self-focusing lens Glens is matched with the polishing angle of the end face of the exit end of the two-fiber pigtail, and the end face of the first end of the radially graded self-focusing lens Glens is provided with an 980/1550nm double-window antireflection film layer.
Preferably, the polishing angle of the end face of the plane end of the plano-convex lens is 8 degrees, and the plano-convex lens is provided with a 1550nm broadband antireflection film layer.
Preferably, the polishing angle of the end face of the incident end of the single fiber pigtail is matched with the polishing angle of the end face of the planar end of the plano-convex lens, and the end face of the incident end of the single fiber pigtail is provided with an antireflection film layer.
More preferably, the dual fiber pigtail comprises a dual fiber capillary having a diameter of
The two capillaries are respectively provided with a public end optical fiber and a reflection end optical fiber, and the public end optical fiber and the reflection end optical fiber are OFS ClearLite 980-20 single-mode optical fibers.
Preferably, said diameterThe diameter of the self-focusing lens Glens is gradually changed
The focusing constant is 0.5992@980nm, the central refractive index is 1.5952@980nm, and the peripheral pitch is 0.248-0.250.
More preferably, the single fiber pigtail comprises a single fiber capillary having a diameter of
The optical fiber comprises a capillary tube, wherein a transmission end optical fiber is arranged in the capillary tube, and the transmission end optical fiber is a Corning ZBL single-mode optical fiber.
Preferably, the diameter of the plano-convex lens is
The curvature radius is 1.15nm, the center length is 2.3mm, and the convex end of the planoconvex lens is a spherical surface.
Preferably, the single fiber pigtail further comprises a first packaging tube, the single fiber pigtail is wrapped in the first packaging tube, and the outer diameter of the first packaging tube is
And the length of the first packaging tube is 8 mm.
Preferably, the dual fiber pigtail further comprises a second packaging tube, the dual fiber pigtail is wrapped in the second packaging tube, and the outer diameter of the second packaging tube is
And the length of the second packaging tube is 6 mm.
Preferably, the hybrid device further comprises an outer sealing tube, the first and second sealing tubes are wrapped in the outer sealing tube, and the outer diameter of the outer sealing tube is
And the length of the outer sealing pipe is15mm。
Preferably, a fixed ceramic gasket is embedded between the radially graded self-focusing lens Glens and the outer sealing tube, and the outer diameter of the fixed ceramic gasket is
An inner diameter of
The thickness is 0.075 mm.
Preferably, the single-stage crystal WALK OFF isolator core is fixedly wrapped in the outer sealing pipe through ultraviolet glue.
Preferably, the single-crystal WALK OFF isolator core has an outer diameter of 1.62mm, an inner diameter of 0.99mm, and a length of 0.9 mm.
Preferably, the length of the PMD sheet is 1.1mm, the width is 1.1mm, and the height is 0.8 mm.
Adopted the utility model discloses a this 1X 2 single-stage isolator and WDM wave filter superimposed hybrid device, it is through specially for the design of special little mode field diameter optic fibre, corresponding size design can compress the whole space of device more to satisfy present miniaturization, to the power stability requirement application demand high very much, and can extensively be arranged in the strict optical path system of space requirement ten thousandths, optic fibre is passive, active light source or optical amplifier.
Drawings
Fig. 1 is a schematic diagram of a longitudinal cross-sectional structure of a hybrid device in which a 1 × 2 single-stage isolator and a WDM filter are stacked according to the present invention.
Reference numerals
1 double optical fiber pigtail
2-radial gradual change self-focusing lens Glens
3 plano-convex lens
4 single optical fiber pigtail
5 first packaging tube
6 second packaging tube
7 external sealing tube
8 fixed ceramic washer
9 thin film filter
10 single-crystal WALK OFF isolator core
11 PMD sheet
Detailed Description
In order to more clearly describe the technical content of the present invention, the following further description is given with reference to specific embodiments.
The utility model discloses a 1X 2 single-stage isolator and superimposed mixing arrangement of WDM wave filter, wherein, the mixing system include two optical fiber pigtail 1 and single optical fiber pigtail 4, two optical fiber pigtail 4's outgoing end and radial gradual change self-focusing lens Glens 2's first end adjacent and the light path corresponds the setting, radial gradual change self-focusing lens Glens 2's second end loop through thin film filter 9, single-stage crystal type WALK OFF isolator core 10 and PMD piece 11 and plano-convex lens 3's convex surface end adjacent and the light path corresponds the setting; the incident end of the single fiber pigtail 4 is adjacent to the plane end of the plano-convex lens 3, and the light path is correspondingly arranged.
In a specific embodiment of the present invention, the polishing angle of the end face of the outgoing end of the dual fiber pigtail 1 is 8 degrees, and the dual fiber pigtail has an anti-reflection film layer of 980/1550 nm.
In a specific embodiment of the present invention, the polishing angle of the first end of the radial gradient self-focusing lens Glens 2 matches with the polishing angle of the end face of the outgoing end of the dual-fiber pigtail 1, and the first end of the radial gradient self-focusing lens Glens 2 has an 980/1550nm dual-window anti-reflection film layer.
In a preferred embodiment of the present invention, the polishing angle of the end face of the plane end of the plano-convex lens 3 is 8 degrees, and the end face has a 1550nm broadband antireflection film layer.
In a preferred embodiment of the present invention, the polishing angle of the end face of the incident end of the single optical fiber pigtail 4 is matched with the polishing angle of the end face of the plane end of the plano-convex lens 3, and the end face of the incident end of the single optical fiber pigtail 4 has an antireflection film layer.
The utility model discloses an implement of preferredIn this way, the dual fiber pigtail 1 comprises a dual fiber capillary having a diameter of
The two capillaries are respectively provided with a public end optical fiber and a reflection end optical fiber, and the public end optical fiber and the reflection end optical fiber are OFS ClearLite 980-20 single-mode optical fibers.
In a preferred embodiment of the present invention, the diameter of the radially graded self-focusing lens Glens 2 is
The focusing constant is 0.5992@980nm, the central refractive index is 1.5952@980nm, and the peripheral pitch is 0.248-0.250.
In a preferred embodiment of the present invention, the single fiber pigtail 4 comprises a single fiber capillary having a diameter of
The optical fiber comprises a capillary tube, wherein a transmission end optical fiber is arranged in the capillary tube, and the transmission end optical fiber is a Corning ZBL single-mode optical fiber.
In a preferred embodiment of the present invention, the diameter of the plano-convex lens 3 is
The curvature radius is 1.15nm, the center length is 2.3mm, and the convex end of the planoconvex lens 3 is a spherical surface.
In a preferred embodiment of the present invention, the single optical fiber pigtail 4 further comprises a first packaging tube 5, the single optical fiber pigtail 4 is wrapped in the first packaging tube 5, and the outer diameter of the first packaging tube 5 is
And the first packing tube 5 has a length of 8 mm.
The utility model disclosesIn a preferred embodiment of the present invention, the dual optical fiber pigtail 1 further includes a second packaging tube 6, the dual optical fiber pigtail 1 is wrapped in the second packaging tube 6, and the outer diameter of the second packaging tube 6 is
And the second package tube 6 has a length of 6 mm.
In the preferred embodiment of the present invention, the hybrid device further comprises an outer sealing tube 7, and the first and second sealing tubes 5 and 6 are all wrapped in the outer sealing tube 7.
In a preferred embodiment of the present invention, the outer diameter of the outer sealing tube 7 is
And the length of the outer sealing pipe 7 is 15 mm.
In a preferred embodiment of the present invention, the radially graded self-focusing lens Glens 2 and the outer sealing tube 7 are embedded with a fixed ceramic gasket 8 therebetween.
In a preferred embodiment of the present invention, the fixed ceramic washer 8 has an outer diameter of
An inner diameter of
The thickness is 0.075 mm.
In a preferred embodiment of the present invention, the single-crystal WALK OFF isolator core 10 is fixedly wrapped in the outer sealing tube 7 by ultraviolet glue.
In a preferred embodiment of the present invention, the single-crystal WALK OFF isolator core 10 has an outer diameter of 1.62mm, an inner diameter of 0.99mm, and a length of 0.9 mm.
In a preferred embodiment of the present invention, the PMD sheet 11 has a length of 1.1mm, a width of 1.1mm, and a height of 0.8 mm.
In a preferred embodiment of the present invention, the fixed ceramic washer 8 can effectively prevent ultraviolet glue from penetrating into the light passing surfaces of the radial gradually-changing self-focusing lens Glens 2 and the dual-fiber pigtail 1; and the optical parameters of the wavelength temperature drift of the whole device are improved through the thermal expansion coefficient of the fixed ceramic gasket 8, and the optical parameters of the wavelength-dependent loss are indirectly improved.
The utility model discloses a better embodiment, thin film filter 9 adopt the film interference technique, can the effectual light beam that separates different wavelength, and then realize the transmission of light beam with 1550nm window wavelength, realize the reflection of light beam with the 980nm wavelength.
In a preferred embodiment of the present invention, the single-crystal wall OFF isolator core 10 passes through a birefringent crystal and a magneto-optically active crystal, and further realizes the functions of forward light transmission and reverse light isolation.
In a more preferred embodiment of the present invention, the PMD sheet 11 is used to compensate for polarization mode dispersion caused by the single-crystal-type WALK OFF isolator core 10.
The structure of the hybrid device formed by stacking the 1 × 2 single-stage isolator and the WDM filter in the above embodiment is shown in fig. 1, and fig. 1 is a schematic longitudinal sectional structural view of the hybrid device formed by stacking the 1 × 2 single-stage isolator and the WDM filter according to the present invention; as can be seen from the figure, the mixing device comprises a branch
The double-fiber pigtail 1, the emergent end of the double-fiber pigtail 1 is designed at an angle of 8 degrees, and a special design
The radially graded self-focusing lens Glens 2 is characterized in that the first end of the lens is designed to be an 8-degree angle, the focusing constant of the lens is 0.5992@980nm, the central refractive index is 1.5952@980n, the peripheral pitch is 0.248-0.250, and one lens is arranged
A plano-convex lens 3 with a curvature radius of 1.15mm and a center length of 2.3mm
A single fiber tail fiber 4 with an incident end at 8 degree and an outer diameter
A first packaging tube 5 with a length of 8mm, an outer diameter
A second packaging tube 6 with the length of 6mm and the outer diameter of one tube being 1.4mm
2.6mm, 15mm long outer sealed tube 7, a piece of fixed ceramic washer 8 with 1.0mm outer diameter and 0.7mm inner diameter and 0.075mm thickness, a piece of thin film filter 9, a single crystal WALK OFF isolator core 10 and a piece of 1550 PMD plate 11 with 22.5 degree optical axis. The utility model discloses a this kind of 1X 2 single-stage isolator can satisfy present miniaturization, require the application demand high very much to power stability with WDM wave filter superimposed hybrid to can extensively be arranged in requiring the harsh light path system of ten thousandths, optic fibre passive, active light source or optical amplifier to the space.
This kind of 1X 2 single-stage isolator and superimposed hybrid of WDM wave filter, through selecting the great radial gradual change self-focusing lens Glens 2 of focus constant, the diameter of its single mode fiber mode field is very little, the divergence angle of the light beam that diverges out after going out the fibre is very big, and the light beam facula transmission that corresponds very fast, therefore the facula of corresponding light beam is also great. By increasing the self-focusing constant, the length of the radial gradient self-focusing lens Glens 2 can be greatly reduced, so that the light beam cannot be greatly diverged, and the size of the light spot of the radial gradient self-focusing lens Glens 2 is also reduced.
Plano-convex lens 3 and radial gradual change self-focusing lens Glens 2 cooperation back disperse the mode field diameter of coming out, the loss that can effectual promotion transmission coupling produced.
The optical index book of the hybrid device of the 1 × 2 single-stage isolator and WDM filter superposition is as follows:
| related parameter | Range of |
| Transmission band range | 1527～1567nm |
| Range of reflection band | 970～980nm |
| Insertion loss of transmission band | <0.6 |
| Insertion loss of reflection band | <0.45 |
| High and low temperature bandwidth reverse isolation | >18dB@1527～1567nm |
| Transmission band transmission isolation | >35dB |
| Isolation of reflection band | >18dB |
| Transmission band wavelength dependent loss | ＜0.15dB |
| Transmission band wavelength dependent loss | ＜0.10dB |
| Transmission band polarization dependent loss | <0.14dB |
| Reflection band polarization dependent loss | <0.10dB |
| Transmission band temperature dependent loss | <0.2dB |
| Reflection band temperature dependent loss | <0.15dB |
| Polarization mode dispersion | <0.05ps |
| Return loss of | >50dB |
| Operating temperature | -5～75℃ |
| Transmissive power carrying | >500mW@1527～1567nm |
| Reflected power carrying | >1200mW@970～980nm |
Adopted the utility model discloses a this kind of 1X 2 single-stage isolator and WDM wave filter superimposed hybrid, through using the dimensional design of one set of miniaturization, under the prerequisite of effective compression device overall dimension, can be applied to specially in the optic fibre of special little mode field diameter, corresponding dimensional design can compress the whole space of device more, thereby satisfy present miniaturization, require the application demand high very much to power stability, and can extensively be arranged in the optical path system that the space requirement ten thousand divides severer, the optic fibre is passive, in active light source or the optical amplifier.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (14)
1. A hybrid device formed by superposing a 1 x 2 single-stage isolator and a WDM filter is characterized by comprising a double-optical-fiber tail fiber (1) and a single-optical-fiber tail fiber (4), wherein the emergent end of the double-optical-fiber tail fiber (1) is adjacent to the first end of a radial gradient self-focusing lens Glens (2), and the optical path of the double-optical-fiber tail fiber is correspondingly arranged, and the second end of the radial gradient self-focusing lens Glens (2) is adjacent to the convex end of a plano-convex lens (3) and correspondingly arranged through a thin film filter (9), a single-stage crystal WALK OFF isolator core (10) and a PMD (11) in sequence; the incident end of the single-fiber tail fiber (4) is adjacent to the plane end of the plano-convex lens (3) and the light path is correspondingly arranged;
the polishing angle of the end face of the emergent end of the double-optical-fiber tail fiber (1) is 8 degrees, and the double-optical-fiber tail fiber is provided with an 980/1550nm antireflection film layer;
the polishing angle of the end face of the first end of the radial gradient self-focusing lens Glens (2) is matched with the polishing angle of the end face of the emergent end of the double-fiber tail fiber (1), and the end face of the first end of the radial gradient self-focusing lens Glens (2) is provided with an 980/1550nm double-window antireflection film layer;
the polishing angle of the end face of the plane end of the plano-convex lens (3) is 8 degrees, and the plano-convex lens is provided with a 1550nm broadband antireflection film layer;
the polishing angle of the end face of the incident end of the single optical fiber tail fiber (4) is matched with the polishing angle of the end face of the plane end of the plano-convex lens (3), and the end face of the incident end of the single optical fiber tail fiber (4) is provided with an antireflection film layer.
2. A hybrid device in which a 1 x 2 single stage isolator is stacked with a WDM filter according to claim 1, wherein said dual fiber pigtail (1) comprises a dual fiber capillary having a diameter of
The two capillaries are respectively provided with a public end optical fiber and a reflection end optical fiber, and the public end optical fiber and the reflection end optical fiber are OFS ClearLite 980-20 single-mode optical fibers.
3. A hybrid device with a 1 x 2 monopole isolator and a WDM filter superimposed according to claim 1, wherein said radially graded self-focusing lens Glens (2) has a diameter of
The focusing constant is 0.5992@980nm, the central refractive index is 1.5952@980nm, and the peripheral pitch is 0.248-0.250.
4. A hybrid in which a 1 x 2 single stage isolator is superimposed on a WDM filter according to claim 1, wherein said single fiber pigtail (4) comprises a single fiber capillary having a diameter of
The optical fiber comprises a capillary tube, wherein a transmission end optical fiber is arranged in the capillary tube, and the transmission end optical fiber is a Corning ZBL single-mode optical fiber.
5. A hybrid of a 1 x 2 single stage isolator with a WDM filter according to claim 1, wherein the plano-convex lens (3) has a diameter of
The curvature radius is 1.15nm, the center length is 2.3mm, and the convex surface end of the planoconvex lens (3) is a spherical surface.
6. A hybrid of a 1 x 2 single stage isolator with a WDM filter according to any one of claims 1 to 5, wherein said single fiber pigtail (4) further comprises a first encapsulation tube (5), said single fiber pigtail (4) is wrapped in said first encapsulation tube (5), said first encapsulation tube (5) has an outer diameter of
And the length of the first packaging tube (5) is 8 mm.
7. A hybrid of a 1 x 2 single stage isolator with a WDM filter according to claim 6, wherein said dual fiber pigtail (1) further comprises a second packaging tube (6), said dual fiber pigtail (1) is wrapped in said second packaging tube (6), said second packaging tube (6) has an outer diameter of
And the length of the second packaging tube (6) is 6 mm.
8. A hybrid of a 1 x 2 single stage isolator with a WDM filter according to claim 7, wherein said hybrid further comprises an outer tube (7), said first (5) and second (6) encapsulating tubes being encased within said outer tube (7).
9. A hybrid of a 1 x 2 single stage isolator with a WDM filter according to claim 8, wherein said outer jacket (7) has an outer diameter of
And the length of the outer sealing pipe (7) is 15 mm.
10. A hybrid device in which a 1 x 2 single-stage isolator is superimposed on a WDM filter according to claim 9, wherein a fixed ceramic gasket (8) is interposed between the radially graded self-focusing lens Glens (2) and the outer sealing tube (7).
11. A hybrid of a 1 x 2 single stage isolator and a WDM filter according to claim 10, wherein the fixed ceramic spacer (8) has an outer diameter of
An inner diameter of
The thickness is 0.075 mm.
12. A hybrid device of a 1 x 2 single-stage isolator with a WDM filter stack according to claim 8, wherein said single-stage crystal WALK OFF isolator core (10) is fixedly wrapped in said outer tube (7) by UV glue.
13. A hybrid device in which a 1 x 2 single stage isolator is superimposed with a WDM filter according to claim 12, wherein said single stage crystal type WALK OFF isolator core (10) has an outer diameter of 1.62mm, an inner diameter of 0.99mm, and a length of 0.9 mm.
14. A hybrid device with a 1 x 2 single stage isolator and a WDM filter stack according to any one of claims 1 to 5, wherein the PMD section (11) has a length of 1.1mm, a width of 1.1mm and a height of 0.8 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466995A (en) * | 2021-07-16 | 2021-10-01 | 厦门贝莱信息科技有限公司 | Manufacturing process of online isolator with filtering function |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466995A (en) * | 2021-07-16 | 2021-10-01 | 厦门贝莱信息科技有限公司 | Manufacturing process of online isolator with filtering function |
| CN113466995B (en) * | 2021-07-16 | 2024-02-23 | 厦门贝莱信息科技有限公司 | On-line isolator manufacturing process with filtering function |
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