CN204925448U - 2 2 polarization maintaining fiber beam splitter - Google Patents
2 2 polarization maintaining fiber beam splitter Download PDFInfo
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- CN204925448U CN204925448U CN201520663325.8U CN201520663325U CN204925448U CN 204925448 U CN204925448 U CN 204925448U CN 201520663325 U CN201520663325 U CN 201520663325U CN 204925448 U CN204925448 U CN 204925448U
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Abstract
The utility model provides a 2 2 polarization maintaining fiber beam splitter, including setting up at the thick glass pipe of the both ends of intermediate position open -ended, the thick intraductal left and right sides of glass is provided with lens respectively, the thin glass pipe of both ends difference fixedly connected with about thick glass pipe, thin glass is intraductal through gluing the fixed glass capillary that has cup jointed, wherein the one end of glass capillary is stretched out to thin glass outside of tubes, the other end extends to thick glass pipe end face at thin glass intraduct, glass capillary axial direction department is equipped with the optic fibre fixed orifices, its one end that is in thin glass outside of tubes side is held for leading -in, the one end work end of thin glass intraduct, leading -in end is the horn mouth structure, be fixed with two optic fibre tail optical fibers of reserving the axle with gluing respectively in the optic fibre fixed orifices of the left and right sides, wherein the stress axis alignment angle of two optic fibre tail optical fibers is 0-180 degree. The utility model provides an in the light path that the polarization maintaining fiber stress axis need be aimed at with specific angle the high problem of the butt fusion degree of difficulty, its simple structure simultaneously, the stable performance is reliable.
Description
Technical field
The utility model relates to technical field of optical fiber, is a kind of polarization maintaining optical fibre Passive Optical Components realizing luminous power beam splitting, particularly a kind of 2 × 2 polarization-maintaining optical fiber beam splitters that can keep optical polarization.
Background technology
Polarization maintaining optical fibre has stronger polarization hold facility to the linearly polarized light transmitted along feature axis, therefore, is widely used in making the fields such as Large Copacity coherent communications, highly sensitive optical fiber sensing system and light information processor.Under most applicable cases, constrained input Stress Profile for Polarization-Maintaining axle is all 0 degree of aligning, namely fast axle inputs the output of fast axle, or slow axis input slow axis exports, but under some applicable cases, while realizing power beam splitting, also need polarization maintaining optical fibre 90-degree rotation, or 45 degree, or other alignment angle, polarization-maintaining fiber coupler now made by traditional scheme has various unsurmountable weakness: because it must adopt PM fiber of MRI, incompatible with the Stress Profile for Polarization-Maintaining region of routine, Polarization Maintaining Optical Fiber Fusion Splicer almost correctly can not identify the stress axis of PM fiber of MRI, no matter aim at welding for 0 degree, or 90 degree are aimed at welding, all can increase considerably the complexity of light path welding, reduce system performance.In addition, also there are the various weakness that general single mode coupling mechanism has, as poor Wavelength Dependent Loss WDL, temperature correlation loss TDL, very poor polarized dependent loss PDL, very poor mechanical vibration and physical shock performance, and poor long-term reliability etc.
Utility model content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of 2 × 2 polarization-maintaining optical fiber beam splitters, and solve and need at Stress Profile for Polarization-Maintaining axle the problem that in the light path of aiming at special angle, welding difficulty is high, its structure is simple simultaneously, stable and reliable for performance.
The utility model solves the technical scheme that its technical matters adopts: a kind of 2 × 2 polarization-maintaining optical fiber beam splitters, comprise the raw glass pipe of the both ends open being arranged on centre position, in raw glass pipe, the left and right sides is respectively arranged with lens, two ends, raw glass pipe left and right are fixedly connected with thin glass tube respectively by glue, glass capillary is connected to by glue fixed cover in thin glass tube, wherein one end of glass capillary extend out to outside thin glass tube, the other end extends to raw glass end surfaces in thin glass tube inside, described glass capillary axial centre place is provided with fiber-optic fixing-hole, its one end be in outside thin glass tube is held for importing, the working end, one end of thin glass tube inside, import end in bell-mouth structure of air, be fixed with glue the two optical fiber pigtails reserving axle respectively in the fiber-optic fixing-hole of the left and right sides, wherein the stress axis alignment angle of two optical fiber pigtail is 0 ~ 180 degree.
Preferably, the stress axis alignment angle of described optical fiber pigtail is 90 degree.
Preferably, the stress axis alignment angle of described optical fiber pigtail is 45 degree.
Preferably, the assembly of raw glass pipe, thin glass tube and glass capillary adopts metal jacket pipe encapsulation.
Preferably, described lens are GRIN Lens (G-Lens), and wherein the both ends of the surface of 1 lens all plate anti-reflection film; In addition 1, near the end face plating anti-reflection film of optical fiber, near the end face plating part reflectance coating of another lens, reflectivity can be determined according to actual demand (as: any number between 1% ~ 99%).
Preferably, described lens are C lens (C-Lens), and be provided with catoptron in the middle of two C lens, its reflectivity can be determined according to actual demand (as: any number between 1% ~ 99%).
Good effect of the present utility model: the mode adopting glass bushing, and the stress axis alignment angle of two optical fiber pigtail can be 90 degree, or 45 degree, and other any alignment angle, directly solve and need at Stress Profile for Polarization-Maintaining axle the problem that in the light path of aiming at special angle, welding difficulty is high.Arranging of the importing end structure of the utility model fiber-optic fixing-hole can make two optical fiber pigtail better insert fixed orifice and have very great help to two optical fiber pigtail dead axle under the microscope, and the mutual alignments such as glass capillary be arranged so that fiber optic splitter performance is more reliable and more stable.To have structure and manufacture craft simple for the utility model in a word, and operating wavelength range is wide, and temperature correlation loss is little, and Polarization Dependent Loss is little, and polarization extinction ratio is high, and insertion loss is little, and operating temperature range is wide, and total length is shorter, the advantage that yield rate is high; PM fiber of MRI can not be adopted as tail optical fiber, and adopt the polarization maintaining optical fibre with the same model of other optical devices, axle sought by the polarization maintaining optical fibre being easy to the fused fiber splice in assembling; Such as, such as, and applied range, makes the polarization-preserving optical fibre device of some specific functions to be directly integrated on polarization-maintaining optical fiber beam splitter, fiber Lyot depolarizer etc., is applicable in special sensor-based system, optical fiber current mutual inductor simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of 2 × 2 polarization-maintaining optical fiber beam splitters described in the utility model;
Fig. 2 is the stress axis alignment angle schematic diagram of 2 × 2 polarization-maintaining optical fiber beam splitters described in the utility model;
The structural representation that Fig. 3 to be 2 × 2 polarization-maintaining optical fiber beam splitter dead axle modes described in the utility model be transmission end is orthogonal with reflection end stressed zone;
Fig. 4 is the structural representation of glass capillary described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
See figures.1.and.2, the utility model preferred embodiment provides a kind of 2 × 2 polarization-maintaining optical fiber beam splitters, comprise the raw glass pipe 1 of the both ends open being arranged on centre position, in raw glass pipe 1, the left and right sides is respectively arranged with lens 4, raw glass pipe about 1 two ends are fixedly connected with thin glass tube 2 respectively by glue, glass capillary 3 is connected to by glue fixed cover in thin glass tube 2, wherein one end of glass capillary 3 extend out to outside thin glass tube 2, the other end extends to raw glass pipe 1 end face in thin glass tube 2 inside, described glass capillary 3 axial centre place is provided with fiber-optic fixing-hole, its one end be in outside thin glass tube 2 is held for importing, the working end, one end of thin glass tube 2 inside, import end in bell-mouth structure of air, be fixed with glue the two optical fiber pigtails 5 reserving axle respectively in the fiber-optic fixing-hole of the left and right sides, wherein the stress axis alignment angle of two optical fiber pigtail 5 is 0 ~ 180 degree (namely alignment angle can be arbitrarily angled, as described in Figure 2), the dead axle mode of two optical fiber pigtails at two ends, left and right can be the same or different.
The assembly of raw glass pipe, thin glass tube and glass capillary adopts metal jacket pipe encapsulation.Described lens are GRIN Lens (G-Lens), and wherein the both ends of the surface of 1 lens all plate anti-reflection film; In addition 1, near the end face plating anti-reflection film of optical fiber, near the end face plating part reflectance coating of another lens, or described lens are C lens, are provided with catoptron in the middle of two C lens.
As shown in Figure 1 1., 2., 3., 4. hold the optical fiber selection scheme of tail optical fiber, the optical fiber that can select pairing is as follows:
1., 2., 3., 4. holding is all polarization maintaining optical fibre;
1., 2. end be polarization maintaining optical fibre, 3., 4. end be single-mode fiber; Or 1., 2. end be single-mode fiber, 3., 4. end be polarization maintaining optical fibre, when being coupled and aligned, polarization maintaining optical fibre reflexes in polarization maintaining optical fibre, is transmitted in single-mode fiber;
1., 4. end be polarization maintaining optical fibre, 2., 3. end be single-mode fiber; Or 1., 4. end be single-mode fiber, 2., 3. end be polarization maintaining optical fibre, when being coupled and aligned, polarization maintaining optical fibre can being selected to be transmitted in polarization maintaining optical fibre, to reflex in single-mode fiber; Or polarization maintaining optical fibre is transmitted in single-mode fiber, reflexes in polarization maintaining optical fibre.
Preferably, as shown in Figure 3, two, two ends, left and right tail optical fiber is adopted to be all polarization maintaining optical fibre, transmission end polarization maintaining optical fibre is 90 degree with reflection end Stress Profile for Polarization-Maintaining axle and aims at, realize fast axle incident, fast axle reflection, slow axis transmission, or fast axle is incident, slow axis reflection, the feature of fast axle transmission, for sensory field of optic fibre, welding difficulty and the misoperation probability of sensor-based system can be reduced, reduce system cost.
As shown in Figure 4, the structure of described glass capillary 3 can divide two sections of compositions, be connected and fixed by glue between two sections, left half section 6 and right half section 7 is respectively equipped with the first through hole 8 and the second through hole 9 near the position of junction, 1, when applying the utility model, glue is full of space between glass capillary inwall and optical fiber pigtail by capillary action, the present embodiment divides kapillary in order to two sections, more be conducive to the insertion of optical fiber pigtail, and the setting of through hole, can use as a Jiao Kou, glue can be better made to be full of the better fixed fiber tail optical fiber of fiber-optic fixing-hole, and the position of through hole can adjust according to actual conditions.
Above-describedly be only preferred embodiment of the present utility model; be understood that; the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; and be not used in restriction protection domain of the present utility model; all any amendments, equivalent replacement etc. made within thought of the present utility model and principle, all should be included within protection domain of the present utility model.
Claims (6)
1.2 × 2 polarization-maintaining optical fiber beam splitters, comprise the raw glass pipe of the both ends open being arranged on centre position, it is characterized in that: in raw glass pipe, the left and right sides is respectively arranged with lens, two ends, raw glass pipe left and right are fixedly connected with thin glass tube respectively by glue, glass capillary is connected to by glue fixed cover in thin glass tube, wherein one end of glass capillary extend out to outside thin glass tube, the other end extends to raw glass end surfaces in thin glass tube inside, described glass capillary axial centre place is provided with fiber-optic fixing-hole, its one end be in outside thin glass tube is held for importing, the working end, one end of thin glass tube inside, import end in bell-mouth structure of air, be fixed with glue the two optical fiber pigtails reserving axle respectively in the fiber-optic fixing-hole of the left and right sides, wherein the stress axis alignment angle of two optical fiber pigtail is 0 ~ 180 degree.
2. 2 × 2 polarization-maintaining optical fiber beam splitters according to claim 1, is characterized in that: the stress axis alignment angle of described optical fiber pigtail is 90 degree.
3. 2 × 2 polarization-maintaining optical fiber beam splitters according to claim 1, is characterized in that: the stress axis alignment angle of described optical fiber pigtail is 45 degree.
4. 2 × 2 polarization-maintaining optical fiber beam splitters according to claim 1, is characterized in that: the assembly of raw glass pipe, thin glass tube and glass capillary adopts metal jacket pipe encapsulation.
5. 2 × 2 polarization-maintaining optical fiber beam splitters according to claim 1, is characterized in that: described lens are GRIN Lens (G-Lens), and wherein the both ends of the surface of 1 lens all plate anti-reflection film; Another end face near optical fiber plating anti-reflection film, near the end face plating part reflectance coating of another lens.
6. 2 × 2 polarization-maintaining optical fiber beam splitters according to claim 1, is characterized in that: described lens are C lens, are provided with catoptron in the middle of two C lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520663325.8U CN204925448U (en) | 2015-08-28 | 2015-08-28 | 2 2 polarization maintaining fiber beam splitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520663325.8U CN204925448U (en) | 2015-08-28 | 2015-08-28 | 2 2 polarization maintaining fiber beam splitter |
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| CN204925448U true CN204925448U (en) | 2015-12-30 |
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| CN201520663325.8U Active CN204925448U (en) | 2015-08-28 | 2015-08-28 | 2 2 polarization maintaining fiber beam splitter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121736A (en) * | 2017-05-12 | 2017-09-01 | 广州奥埔达光电科技有限公司 | A kind of packaging system and its method for packing of automatically controlled optical device |
| CN109655231A (en) * | 2018-11-20 | 2019-04-19 | 湖北三江航天红峰控制有限公司 | 2 × 2 polarization-maintaining optical fiber beam splitter working shaft detection methods of one kind and system |
| CN110794500A (en) * | 2019-11-20 | 2020-02-14 | 苏州浩联光电科技有限公司 | Filtering self-focusing lens and optical communication passive optical device |
| CN110989089A (en) * | 2019-12-27 | 2020-04-10 | 光越科技(深圳)有限公司 | Polarization maintaining optical fiber head and collimator |
| CN114273159A (en) * | 2021-12-20 | 2022-04-05 | 江苏永鼎光电子技术有限公司 | Double-core tail fiber and auxiliary gluing tool thereof |
| CN115301510A (en) * | 2022-07-21 | 2022-11-08 | 北京浦丹光电股份有限公司 | Automatic glue homogenizing device for circular tube shell packaged by glue |
-
2015
- 2015-08-28 CN CN201520663325.8U patent/CN204925448U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121736A (en) * | 2017-05-12 | 2017-09-01 | 广州奥埔达光电科技有限公司 | A kind of packaging system and its method for packing of automatically controlled optical device |
| CN109655231A (en) * | 2018-11-20 | 2019-04-19 | 湖北三江航天红峰控制有限公司 | 2 × 2 polarization-maintaining optical fiber beam splitter working shaft detection methods of one kind and system |
| CN109655231B (en) * | 2018-11-20 | 2020-07-14 | 湖北三江航天红峰控制有限公司 | Method and system for detecting working axis of 2 × 2 polarization maintaining optical fiber beam splitter |
| CN110794500A (en) * | 2019-11-20 | 2020-02-14 | 苏州浩联光电科技有限公司 | Filtering self-focusing lens and optical communication passive optical device |
| CN110989089A (en) * | 2019-12-27 | 2020-04-10 | 光越科技(深圳)有限公司 | Polarization maintaining optical fiber head and collimator |
| CN114273159A (en) * | 2021-12-20 | 2022-04-05 | 江苏永鼎光电子技术有限公司 | Double-core tail fiber and auxiliary gluing tool thereof |
| CN115301510A (en) * | 2022-07-21 | 2022-11-08 | 北京浦丹光电股份有限公司 | Automatic glue homogenizing device for circular tube shell packaged by glue |
| CN115301510B (en) * | 2022-07-21 | 2023-09-26 | 北京浦丹光电股份有限公司 | Automatic glue homogenizing device for glue packaging of round tube shell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiang Meihua Inventor after: Dai Hongwei Inventor after: Li Wenling Inventor after: Xue Ting Inventor after: Geng Fan Inventor before: Xiang Meihua |
|
| COR | Change of bibliographic data | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100176 Daxing District City, Beijing economic and Technological Development Zone, sea road, No. 18, No. 1, building 2, four Patentee after: BEIJING PUDAN PHOTOELECTRIC TECHNOLOGY CO., LTD. Address before: 100176 Daxing District City, Beijing economic and Technological Development Zone, sea road, No. 18, No. 1, building 2, four Patentee before: Beijing PANWOO Integrated Optoelectronic Co., Ltd. |
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| DD01 | Delivery of document by public notice |
Addressee: BEIJING PUDAN PHOTOELECTRIC TECHNOLOGY CO., LTD. Document name: Notification that Application Deemed not to be Proposed |