CN2470844Y - Double-stage isolator - Google Patents
Double-stage isolator Download PDFInfo
- Publication number
- CN2470844Y CN2470844Y CN 01217637 CN01217637U CN2470844Y CN 2470844 Y CN2470844 Y CN 2470844Y CN 01217637 CN01217637 CN 01217637 CN 01217637 U CN01217637 U CN 01217637U CN 2470844 Y CN2470844 Y CN 2470844Y
- Authority
- CN
- China
- Prior art keywords
- stage
- isolator
- stage isolator
- twin
- pmd
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 238000002955 isolation Methods 0.000 abstract description 12
- 239000012634 fragment Substances 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Abstract
The utility model relates to a dual-stage isolator which is composed of two single stage isolators, i.e. the backs of the two single stage isolators are respectively provided with a parallel birefringent crystal which can perform the compensation to single stage isolator PMD. The utility model can realize the compensation of high isolative PMD, and greatly enhance complete product ratio and assembling rate of the dual-stage isolation, and improve most optimal isolation degree of the dual-stage isolator, so as to be one best plan for producing the dual-stage isolator.
Description
The utility model belongs to optical-fibre communications field, refers in particular to a kind of twin-stage isolator.
The relative single-stage isolator of twin-stage isolator has better temperature performance, more wide bandwidth scope and more high-isolation extensively should be in optical-fibre communications.The twin-stage isolator has multiple structure and patent, but existing market product primary structure is to adopt two single-stage angle of wedge isolators to combine (to see patent USP5,581,640), utilize the relative position of the vertical optical direction optical axis of two single-stage isolator angle of wedge sheets simultaneously, make two single-stage isolators produce PMD (polarization dispersion), cancel out each other, promptly in first order single-stage isolator light path, be split into O light, e light two-beam; Be respectively e light, O light when entering second level single-stage isolator; Be that O light is e light at second level isolator in the first order isolator; E light in the first order isolator, at second level isolator is O light, because first order single-stage isolator angle of wedge sheet equates with second level single-stage isolator angle of wedge sheet physical dimension, by symmetry then twin-stage isolator PMD compensate automatically and offset, during practical operation be with the relative first order isolator of first angle of wedge sheet of second level isolator optical axis counterclockwise (or along pin) rotation get final product for 45 °.Its ultimate principle index path as shown in Figure 1.
101,103 is first order isolator birefringent wedge gusset plate, and 102 is first order isolator faraday revolving fragment, and 104,106 is second level isolator birefringece crystal angle of wedge sheet, and 105 is faraday's revolving fragment, and 107 is permanent magnet ring.The twin-stage isolator is very responsive to two single-stage isolator relative positions, in order to obtain high the isolation, two suitably levelling of single-stage isolator relative position, but might destroy the relative 45 ° of requirements of first angle of wedge sheet of two single-stage isolators optical axis in the original design like this; Make twin-stage isolator PMD may can not get best compensation, run into the not high and isolation difficulty of yield rate and reach the mxm. problem so the twin-stage isolator is produced on production line with this kind scheme.
The purpose of this utility model is to provide the conventional PMD compensation of a kind of solution twin-stage isolation that isolator runs into to be difficult for reaching the optimal isolation degree and yield rate is not high, promptly realizes the twin-stage isolator of high-isolation PMD compensation optimum value.
Technical solutions of the utility model are such, a kind of twin-stage isolator, combine by two single-stage isolators, and behind two single-stage isolators, respectively add the parallel plain film birefringece crystal of a slice, be fixedly arranged in the permanent magnet ring by the fixed mount on two single-stage isolators again.
The present relatively popular twin-stage spacer structures of the utility model, owing to make two single-stage isolated core PMD carry out compensation in advance, thereby make two isolator cores needn't be in specific unique relative position and realize the PMD compensation, make two isolator relative positions be in the scalable state, by rotating two-stage isolator relative position, more easily find twin-stage isolator maximum isolation degree relative position, greatly improve twin-stage isolator yield rate, assembling speed and raising twin-stage isolator isolation optimization probability, thereby will become one of the twin-stage isolator optimal period scheme of making, on producing, greater advantage is arranged, will be widely used in isolator and manufacture.
Now elaborate in conjunction with the embodiments.
Fig. 1 is prior art structure and light path synoptic diagram.
Fig. 2 is the utility model structure and light path synoptic diagram.
As shown in Figure 2,201,203 is birefringece crystal angle of wedge sheet, 202 is faraday's revolving fragment, 204 is parallel plain film birefringece crystal, 205 are the fixing fixed mount of birefringece crystal angle of wedge sheet 201,203, faraday's revolving fragment 202, parallel plain film refracting crystal 204, simultaneously, birefringece crystal angle of wedge sheet 201, faraday's revolving fragment 202, birefringece crystal angle of wedge sheet 203, parallel plain film refracting crystal 204 are the conventional first order (PMD) compensation single-stage isolator core; 206,208 also is birefringece crystal angle of wedge sheet, 207 is faraday's revolving fragment, 210 is parallel plain film birefringece crystal, 209 are the fixing fixed mount of birefringece crystal angle of wedge sheet 206,208, faraday's revolving fragment 207, parallel plain film birefringece crystal 210,206 birefringece crystal angle of wedge sheets, 207 faraday rotation, 208 birefringece crystal angle of wedge sheets, 210 parallel plain film birefringece crystals are second level PMD compensation single-stage isolator core, and 211 is permanent magnet ring.
The utility model is combined by two single-stage isolators, the fixed mount 205,209 that is about on each single-stage isolator is fixedly arranged in the permanent magnet ring 211, the parallel plain film birefringece crystal 204,210 of a slice is set respectively behind each single-stage isolator, make in the single-stage isolator is after O light and e light light beam compensate by parallel plain film birefringece crystal 204,210, to be respectively e light and O light again.Specific thicknesses value birefringece crystal just in time compensates by the single-stage isolator and produces PMD like this.Because the utility model adopts two single-stage isolators that PMD has compensated, so the don't care state that the position between the single-stage isolator can 360 ° on two can guarantee that still PMD is in compensating coefficient; In background technology, introduce like this in the conventional twin-stage isolator core two single-stage isolator cores combination back isolations to relative position very tender subject can be resolved.During practical operation, rotate the relative first order isolated core of second level isolator core relative position and arrive isolator isolation mxm. up to the twin-stage isolator, then can more easily reach two relative optimum positions of single-stage isolator, the fixedly first order and second level isolator core relative position are promptly realized high PMD compensation twin-stage isolator of isolating again.
The utility model also can adopt the faraday's revolving fragment that carries magnetic field, and its principle and method for making are the same, as long as change Fig. 2 middle magnetic ring 211 into the plain metal cylinder.
Claims (1)
1. twin-stage isolator, combine by two single-stage isolators, it is characterized in that behind two single-stage isolators, respectively being provided with the parallel plain film birefringece crystal of a slice (204), (210), be fixedly arranged in the permanent magnet ring (211) by fixed mount (205), (209) on two single-stage isolators again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01217637 CN2470844Y (en) | 2001-02-23 | 2001-02-23 | Double-stage isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01217637 CN2470844Y (en) | 2001-02-23 | 2001-02-23 | Double-stage isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2470844Y true CN2470844Y (en) | 2002-01-09 |
Family
ID=33635819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01217637 Expired - Lifetime CN2470844Y (en) | 2001-02-23 | 2001-02-23 | Double-stage isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2470844Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066512A (en) * | 2016-08-22 | 2016-11-02 | 深圳市创鑫激光股份有限公司 | Optoisolator |
| CN106066545A (en) * | 2016-08-02 | 2016-11-02 | 福建中策光电股份公司 | A kind of Double-stage isolator core and processing technology thereof and device |
-
2001
- 2001-02-23 CN CN 01217637 patent/CN2470844Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066545A (en) * | 2016-08-02 | 2016-11-02 | 福建中策光电股份公司 | A kind of Double-stage isolator core and processing technology thereof and device |
| CN106066545B (en) * | 2016-08-02 | 2019-04-09 | 福建中策光电股份公司 | A kind of Double-stage isolator core and its manufacture craft and device |
| CN106066512A (en) * | 2016-08-22 | 2016-11-02 | 深圳市创鑫激光股份有限公司 | Optoisolator |
| CN106066512B (en) * | 2016-08-22 | 2018-05-18 | 深圳市创鑫激光股份有限公司 | Optoisolator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110223 Granted publication date: 20020109 |