CN203324510U - Crystal type 1*2 polarization-maintaining coupler with isolation function - Google Patents
Crystal type 1*2 polarization-maintaining coupler with isolation function Download PDFInfo
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- CN203324510U CN203324510U CN201320408973XU CN201320408973U CN203324510U CN 203324510 U CN203324510 U CN 203324510U CN 201320408973X U CN201320408973X U CN 201320408973XU CN 201320408973 U CN201320408973 U CN 201320408973U CN 203324510 U CN203324510 U CN 203324510U
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Abstract
The utility model discloses a crystal type 1*2 polarization-maintaining coupler with an isolation function. The crystal type 1*2 polarization-maintaining coupler is characterized by comprising a first polarization-maintaining single optical fiber collimator, at least one light polarization splitting isolation assembly and a second polarization-maintaining double optical fiber collimator which are sequentially arranged along an optical path; the light polarization splitting isolation assembly is composed of a polarization beam splitter formed by two wedge angle pieces, namely, a wedge angle pair, and a magnetic rotation crystal arranged between the two wedge angle pieces; an optical axis included angle of the two wedge angle pieces is 45 degrees. The crystal type 1*2 polarization-maintaining coupler with the isolation function has the beneficial effects that a positive transmission function thereof is identical to that of a polarization-maintaining coupler adopting a method of fused biconical taper, the polarization extinction ratio is higher, the temperature performance is stable, and negative transmission has the high isolation performance.
Description
Technical field
The utility model relates to optical field, specifically, relates to a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler.
Background technology
Polarization maintaining optical fibre is the optical fiber that can keep the original polarization state transmission of light wave, the existing fiber Internet Transmission is often used this polarization maintaining optical fibre, require incident light is carried out to optical power adjustment simultaneously, make the light splitting luminous power of outgoing meet certain requirements, so polarization-maintaining coupler arises at the historic moment.
Chinese invention patent " manufacture method of polarization-maintaining fiber coupler ", publication number is CN101162281, discloses a kind of manufacture method of polarization-maintaining fiber coupler, and it adopts the fused biconical taper scheme, and concrete grammar is: the part coat of removing the fibre cladding outside; Every optical fiber is removed to the part of coat and carried out the drawing-down processing; Multifiber is carried out to part after drawing-down to be close together and to carry out the fused biconical taper processing; Wherein, in the drawing-down processing procedure, along described optical fiber axially clip the part covering, and the amputation part is along optical fiber, thickness radially is less than the radius of optical fiber.
Yet above-mentioned fused tapered scheme need to solve the difficult alignment issues of Stress Profile for Polarization-Maintaining axle; Polarization maintaining optical fibre is by drawing-down, and stress area changes, and causes polarization extinction ratio not high, and temperature performance is unstable.In addition, manufacture this photo-coupler and need to use oxyhydrogen flame or electric arc processes, the large yield of difficulty is low, and production cost is higher.
The utility model content
The purpose of this utility model is to overcome the shortcoming and defect that prior art exists, a kind of 1*2 of the crystal-type with isolation features protects the polarisation coupling mechanism, its forward transfer function of realizing is identical with the polarization-maintaining fiber coupler that adopts the fused biconical taper method, and polarization extinction ratio is higher, temperature performance is stable, and reverse transfer has the high-isolation performance.
For achieving the above object, the technical scheme that the utility model proposes is: a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler is characterized in that: comprise the first guarantor inclined to one side single optical fiber calibrator, at least one light polarization light splitting barrier assembly and the second polarization-maintaining dual fiber collimator set gradually along light path; Described light polarization light splitting barrier assembly is the polarization beam apparatus consisted of two angle of wedge sheets (be the angle of wedge to) and is located at a slice magnetic opticity crystal composition in the middle of two angle of wedge sheets; The optical axis included angle of described two angle of wedge sheets is at 45 °.
Preferably, described light polarization light splitting barrier assembly, for the band magnet ring structure, also can be and is not with magnet ring structure,
Further, described the first inclined to one side single optical fiber calibrator of guarantor or the second polarization-maintaining dual fiber collimator are comprised of lens, optical fiber head, glass tube or metal tube, and described lens, optical fiber head, glass tube or metal tube are by glue bond together.
Further, described lens are C type lens or GRIN Lens.
Further, described optical fiber head is containing angle of wedge angled end-face.
Further, the stress axis of two optical fiber heads of described the second polarization-maintaining dual fiber collimator is orthogonal.
Further, described the second polarization-maintaining dual fiber collimator can adopt two to protect inclined to one side single optical fiber calibrator combination replacement or adopt two inclined to one side single optical fiber calibrators of guarantor+roof prisms combination to replace; In the case, the stress axiss of described two inclined to one side single optical fiber calibrators of guarantor are mutually vertical.
Further, described angle of wedge sheet is birefringece crystal angle of wedge sheet, and is preferably Yttrium Orthovanadate angle of wedge sheet, lithium niobate angle of wedge sheet or quartz crystal angle of wedge sheet.
Adopt technique scheme, the beneficial effect of the 1*2 of the crystal-type with isolation features polarization-maintaining coupler described in the utility model is: first protect inclined to one side single optical fiber calibrator, one or more light polarization light splitting barrier assembly, and the second polarization-maintaining dual fiber collimator after the debugging optical index, can be assembled by welding technology or the complete full adhesive process of glass, process stabilizing, dependable performance.In addition, the utility model scheme does not change Stress Profile for Polarization-Maintaining axle zone state, and it is not impaired that optical fiber cable is protected inclined to one side ability; And the extinction ratio performance of optical crystal type is stable, therefore the polarization-maintaining coupler of comparable traditional fused tapered has higher extinction ratio, the output splitting ratio can be by regulating the angle of the angle of wedge to optical axis and collimator of PMF stress axis, process operation is simpler, flexible, and, because the angle of wedge is a slice magnetic opticity crystal to centre, can realize the function of reverse transfer isolation.
The accompanying drawing explanation
Fig. 1 is the 1*2 of the crystal-type with isolation features polarization-maintaining coupler structural representation described in the utility model;
Fig. 2 is the described 1*2 of the crystal-type with isolation features polarization-maintaining coupler light path transmission structure schematic diagram;
The orthogonal schematic diagram of stress axis of two optical fiber heads that Fig. 3 is polarization-maintaining dual fiber collimator.
Fig. 4 is two and protects the schematic diagram that inclined to one side single optical fiber calibrator+roof prisms combine to substitute the mode of polarization-maintaining dual fiber collimator.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
As shown in Figure 1, Figure 3, crystal-type 1*2 polarization-maintaining coupler with isolation features comprises the first guarantor inclined to one side single optical fiber calibrator 11, at least one light polarization light splitting barrier assembly 13 and the second polarization-maintaining dual fiber collimator 12 set gradually along light path, and described light polarization light splitting barrier assembly 13 comprises optical axis two angle of wedge sheets 104,105 at 45 °; And be located at a magnetic opticity crystal 103 of 104,105 of two angle of wedge sheets, the concrete inclined to one side single optical fiber calibrator 11 of the first guarantor comprises that protecting inclined to one side single fiber head 101, lens 102, glass tube or metal tube forms, and sticks with glue knot; The second polarization-maintaining dual fiber collimator 12 comprises that protecting inclined to one side double optical fiber head 106, lens 102, glass tube or metal tube forms, and sticks with glue knot.
In addition, the second polarization-maintaining dual fiber collimator can adopt two to protect inclined to one side single optical fiber calibrator combination replacement or adopt two inclined to one side single optical fiber calibrators of guarantor+roof prisms combination to replace; In the case, the stress axiss of described two inclined to one side single optical fiber calibrators of guarantor are mutually vertical.
As shown in Fig. 2 the utility model light path transmission structure schematic diagram, flashlight, from protecting inclined to one side single fiber 301 inputs, enters light polarization light splitting barrier assembly 13 and carries out light splitting, is divided into the mutually perpendicular flashlight of two bundle polarization states, receives and enters the partially two optical fiber cables 302 and 303 of guarantor.Wherein, 301 optical axises and angle of wedge sheet 104 optical axis included angles are α, by changing α, can realize the 302 splitting ratio power stages different from 303.For example, when α is 45 °, 302 and 303 output power is suitable.
Visible just like upper scheme, while manufacturing crystal-type guarantor polarisation coupling mechanism, without using oxyhydrogen flame or electric arc to carry out heat treated to optical fiber, technique is relatively simple, and production cost is lower.And by changing 301 optical axises and angle of wedge sheet 104 optical axis included angle α can change the output splitting ratio, flexible adjustment is convenient, and the extinction ratio of photo-coupler is higher, and performance is more stable.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; in the form and details the utility model is made a variety of changes, be protection domain of the present utility model.
Claims (10)
1. the 1*2 of the crystal-type with an isolation features polarization-maintaining coupler, is characterized in that: comprise the first guarantor inclined to one side single optical fiber calibrator, at least one light polarization light splitting barrier assembly and the second polarization-maintaining dual fiber collimator set gradually along light path; Described light polarization light splitting barrier assembly is the polarization beam apparatus consisted of two angle of wedge sheets and is located at the middle a slice magnetic opticity crystal composition of two angle of wedge sheets; The optical axis included angle of described two angle of wedge sheets is at 45 °.
2. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 1 is characterized in that: described light polarization light splitting barrier assembly is the band magnet ring structure.
3. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 1, it is characterized in that: described the first inclined to one side single optical fiber calibrator of guarantor or the second polarization-maintaining dual fiber collimator are comprised of lens, optical fiber head, glass tube or metal tube, and described lens, optical fiber head, glass tube or metal tube are by glue bond together.
4. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 3, it is characterized in that: described lens are C type lens or GRIN Lens, described optical fiber head is containing angle of wedge angled end-face.
5. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 1, it is characterized in that: the stress axis of two optical fiber heads of described the second polarization-maintaining dual fiber collimator is orthogonal.
6. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 1, is characterized in that: the inclined to one side single optical fiber calibrators combination of two guarantors of described the second polarization-maintaining dual fiber collimator employing replacement.
7. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 1, is characterized in that: two inclined to one side single optical fiber calibrators of guarantor of described the second polarization-maintaining dual fiber collimator employing+roof prisms combination replacement.
8. according to the described a kind of 1*2 of the crystal-type with the isolation features polarization-maintaining coupler of claim 6 or 7, it is characterized in that: described two stress axiss of protecting inclined to one side single optical fiber calibrator are mutually vertical.
9. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 1, it is characterized in that: described angle of wedge sheet is birefringece crystal angle of wedge sheet.
10. a kind of 1*2 of the crystal-type with isolation features polarization-maintaining coupler according to claim 9, it is characterized in that: described birefringece crystal angle of wedge sheet can be Yttrium Orthovanadate angle of wedge sheet, lithium niobate angle of wedge sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320408973XU CN203324510U (en) | 2013-07-10 | 2013-07-10 | Crystal type 1*2 polarization-maintaining coupler with isolation function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320408973XU CN203324510U (en) | 2013-07-10 | 2013-07-10 | Crystal type 1*2 polarization-maintaining coupler with isolation function |
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| CN203324510U true CN203324510U (en) | 2013-12-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913857A (en) * | 2014-04-01 | 2014-07-09 | 深圳市艾格莱光电科技有限公司 | Optical isolation method and optical isolation device |
| CN103941342A (en) * | 2014-04-29 | 2014-07-23 | 深圳市越海光通信科技有限公司 | Structure of polarization-maintaining optical hybrid device |
| CN108319041A (en) * | 2018-02-23 | 2018-07-24 | 珠海光库科技股份有限公司 | Optical circulator and its application method |
| CN108390245A (en) * | 2018-04-28 | 2018-08-10 | 无锡市德科立光电子技术有限公司 | Microminiature fiber amplifier |
-
2013
- 2013-07-10 CN CN201320408973XU patent/CN203324510U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913857A (en) * | 2014-04-01 | 2014-07-09 | 深圳市艾格莱光电科技有限公司 | Optical isolation method and optical isolation device |
| CN103913857B (en) * | 2014-04-01 | 2017-04-12 | 浙江奥智光电科技有限公司 | Optical isolation method and optical isolation device |
| CN103941342A (en) * | 2014-04-29 | 2014-07-23 | 深圳市越海光通信科技有限公司 | Structure of polarization-maintaining optical hybrid device |
| CN108319041A (en) * | 2018-02-23 | 2018-07-24 | 珠海光库科技股份有限公司 | Optical circulator and its application method |
| CN108390245A (en) * | 2018-04-28 | 2018-08-10 | 无锡市德科立光电子技术有限公司 | Microminiature fiber amplifier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |
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| CX01 | Expiry of patent term |