CN203745678U - Polarization-maintaining isolator - Google Patents
Polarization-maintaining isolator Download PDFInfo
- Publication number
- CN203745678U CN203745678U CN201420110335.4U CN201420110335U CN203745678U CN 203745678 U CN203745678 U CN 203745678U CN 201420110335 U CN201420110335 U CN 201420110335U CN 203745678 U CN203745678 U CN 203745678U
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- CN
- China
- Prior art keywords
- isolator
- magnet ring
- faraday
- medium
- polarization
- 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
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- 230000003287 optical effect Effects 0.000 claims abstract description 26
- 230000010287 polarization Effects 0.000 abstract description 20
- 230000005389 magnetism Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Abstract
The utility model relates to a polarization-maintaining isolator comprising an isolator and an optical rotation sheet assembly. The optical rotation sheet assembly is installed on the front end of the isolator. The isolator comprises a polarizer, a first Faraday medium, a polarization analyzer, and a first magnet ring. The polarizer, the first Faraday medium and the polarization analyzer are all located inside the first magnet ring. The first Faraday medium is arranged between the polarizer and the polarization analyzer. The optical rotation sheet assembly comprises a second Faraday medium and a second magnet ring. The second Faraday medium is located inside the second magnet ring. A side of the first magnet ring and a side of the second magnet ring are close to each other and have same magnetism. The second Faraday medium is arranged adjacent to the polarization analyzer. By means of the above structure, the polarization-maintaining isolator may effectively compensate angle rotation of light passing through the polarization-maintaining isolator, eliminate influence on an optical path caused by polarization direction change arising from the traditional isolator, and provide an optical path with good performance.
Description
Technical field
The utility model relates to a kind of inclined to one side isolator of protecting, and is applied to optical communication field.
Background technology
At present, optical communication field is widely used faraday's formula isolator, and as shown in Figure 1, this isolator comprises polarizer a, faraday's medium b, analyzer c, magnet ring d and metal assembly (not label).Due to the optically-active characteristic of faraday's medium b, incident ray has the rotation of 45 ° through whole isolator rear polarizer direction.In light path, some optical device is as optical filter, very responsive for the variation of polarization of light direction, and the change of the light polarization direction causing due to isolator tends to reduce the performance of whole light path.
Therefore be necessary to design the inclined to one side isolator of a kind of novel guarantor, to overcome the problems referred to above.
Utility model content
The purpose of this utility model is to overcome the defect of prior art, and a kind of inclined to one side isolator of guarantor of light path better performances is provided.
The utility model is achieved in that
The utility model provides a kind of inclined to one side isolator of protecting, and comprises isolator and optical rotation plate assembly, and described optical rotation plate assembly is installed on the front end of described isolator; Described isolator comprises the polarizer, first faraday's medium, analyzer and the first magnet ring, the described polarizer, described first faraday's medium and described analyzer are all positioned at described the first magnet ring inside, and described first faraday's medium is between the described polarizer and described analyzer; Described optical rotation plate assembly comprises second faraday's medium and the second magnet ring, and described second faraday's medium is positioned at described the second magnet ring; Wherein, described the first magnet ring side Magnetic Phase mutually close with described the second magnet ring is with, described second faraday's medium setting adjacent with described analyzer.
Further, described isolator has one first metalwork, and in the form of a ring, described the first magnet ring is positioned at the inside of described the first metalwork to described the first metalwork, and the front end of described the first metalwork has at least one first breach.
Further, described optical rotation plate assembly has one second metalwork, described the second metalwork in the form of a ring, described the second magnet ring is positioned at the inside of described the second metalwork, the front end of described the second metalwork has at least one second breach, and described the first breach and described the second breach are positioned on same level line.
Further, described first faraday's medium is identical with described second faraday's medium.
The utlity model has following beneficial effect:
Incident ray has all rotated identical angle in described isolator and in described optical rotation plate assembly, because the side Magnetic Phase that described the first magnet ring is mutually close with described the second magnet ring is same, make the magnetic direction of described the first magnet ring and described the second magnet ring inside contrary, therefore incident ray is contrary through the angle of twice rotation, make final emergent ray identical with the polarization direction of incident ray, thereby effectively compensate light by the angle rotation after isolator, eliminate the impact on light path of change of polarized direction that traditional isolator causes, a kind of light path of better performances is provided.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the cut-open view of existing isolator;
The stereographic map of the inclined to one side isolator of guarantor that Fig. 2 provides for the utility model embodiment;
The cut-open view of the inclined to one side isolator of guarantor that Fig. 3 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
As Fig. 2-Fig. 3, the utility model provides a kind of inclined to one side isolator of protecting, and comprises isolator 1 and optical rotation plate assembly 2, and described optical rotation plate assembly 2 is installed on the front end of described isolator 1.
As Fig. 2-Fig. 3, described isolator 1 comprises the polarizer 13, first faraday's medium 14, analyzer 15, the first magnet ring 12 and the first metalwork 11, described the first metalwork 11 in the form of a ring, described the first magnet ring 12 is positioned at the inside of described the first metalwork 11, the front end of described the first metalwork 11 has at least one first breach 16, in this preferred embodiment, the quantity of described the first breach 16 is two.The described polarizer 13, described first faraday's medium 14 and described analyzer 15 are all positioned at described the first magnet ring 12 inside, and described first faraday's medium 14 is between the described polarizer 13 and described analyzer 15.When incident ray is injected, pass through successively the described polarizer 13, described first faraday's medium 14 and described analyzer 15, then penetrate.
As Fig. 2-Fig. 3, described optical rotation plate assembly 2 comprises second faraday's medium 24, the second magnet ring 22 and the second metalwork 21, described the second metalwork 21 in the form of a ring, the front end of described the second metalwork 21 has at least one second breach 26, in this preferred embodiment, the quantity of described the second breach 26 is two.Described the first breach 16 and described the second breach 26 are positioned on same level line, therefore can ensure described isolator 1 and the correct contraposition of described optical rotation plate assembly 2.Described the second magnet ring 22 is positioned at the inside of described the second metalwork 21, described second faraday's medium 24 is positioned at described the second magnet ring 22, described the second faraday's medium 24 and the adjacent setting of described analyzer 15, the light penetrating from described analyzer 15 can be injected described second faraday's medium 24, and then penetrates.In this preferred embodiment, described first faraday's medium 14 is identical with described second faraday's medium 24, that is to say both just the same, consistent at size, material, installation position etc.
As Fig. 2-Fig. 3, described the first magnet ring 12 side Magnetic Phase mutually close with described the second magnet ring 22 with, make the magnetic direction of described the first magnet ring 12 and described the second magnet ring 22 inside contrary.Incident ray has all rotated identical angle in described isolator 1 and in described optical rotation plate assembly 2, because the magnetic direction of described the first magnet ring 12 and described the second magnet ring 22 inside is contrary, therefore incident ray is contrary through the angle of twice rotation, make final emergent ray identical with the polarization direction of incident ray, thereby effectively compensate light by the angle rotation after isolator 1, eliminate the impact on light path of change of polarized direction that traditional isolator 1 causes.
As Fig. 2-Fig. 3, the concrete principle of the inclined to one side isolator of described guarantor is as follows: incident ray is injected described isolator 1, and the polarization direction of incident ray is identical with the polarization direction of the described polarizer 13 conventionally, and light is lossless to be passed through.Enter described first faraday's medium 14 from the light of the described polarizer 13 outgoing, under the effect in described the first magnet ring 12 magnetic fields, the polarization direction of light is in (or the counterclockwise) rotation clockwise of described first faraday's medium 14, in the time leaving described first faraday's medium 14,45 ° of polarization of light direction rotations.Light enters described analyzer 15 again, because there is clockwise (or counterclockwise) angle of 45 ° the polarization direction of the more described polarizer 13 in polarization direction of described analyzer 15.Now the polarization direction of light is just identical with the polarization direction of described analyzer 15, so light is lossless by described analyzer 15.Light enters second faraday's medium 24 in described optical rotation plate assembly 2 from described analyzer 15 outgoing, under the effect in described the second magnet ring 22 magnetic fields, the polarization direction of light is in (or the clockwise) rotation counterclockwise of described second faraday's medium 24, in the time leaving described second faraday's medium 24, when entering described optical rotation plate assembly 2, polarization of light direction rotates 45 °.Because light has all rotated 45 ° in isolator 1 and in optical rotation plate, and the opposite direction of rotation, make final emergent ray identical with the polarization direction of incident ray, thereby effectively compensate light by the angle rotation after isolator 1, eliminate the impact on light path of change of polarized direction that traditional isolator causes, a kind of light path of better performances is provided.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. protect an inclined to one side isolator, it is characterized in that, comprise isolator and optical rotation plate assembly, described optical rotation plate assembly is installed on the front end of described isolator;
Described isolator comprises the polarizer, first faraday's medium, analyzer and the first magnet ring, the described polarizer, described first faraday's medium and described analyzer are all positioned at described the first magnet ring inside, and described first faraday's medium is between the described polarizer and described analyzer;
Described optical rotation plate assembly comprises second faraday's medium and the second magnet ring, and described second faraday's medium is positioned at described the second magnet ring;
Wherein, described the first magnet ring side Magnetic Phase mutually close with described the second magnet ring is with, described second faraday's medium setting adjacent with described analyzer.
2. the inclined to one side isolator of guarantor as claimed in claim 1, it is characterized in that: described isolator has one first metalwork, in the form of a ring, described the first magnet ring is positioned at the inside of described the first metalwork to described the first metalwork, and the front end of described the first metalwork has at least one first breach.
3. the inclined to one side isolator of guarantor as claimed in claim 2, it is characterized in that: described optical rotation plate assembly has one second metalwork, described the second metalwork in the form of a ring, described the second magnet ring is positioned at the inside of described the second metalwork, the front end of described the second metalwork has at least one second breach, and described the first breach and described the second breach are positioned on same level line.
4. the inclined to one side isolator of guarantor as claimed in claim 1, is characterized in that: described first faraday's medium is identical with described second faraday's medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420110335.4U CN203745678U (en) | 2014-03-12 | 2014-03-12 | Polarization-maintaining isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420110335.4U CN203745678U (en) | 2014-03-12 | 2014-03-12 | Polarization-maintaining isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203745678U true CN203745678U (en) | 2014-07-30 |
Family
ID=51345461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420110335.4U Expired - Lifetime CN203745678U (en) | 2014-03-12 | 2014-03-12 | Polarization-maintaining isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203745678U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629386A (en) * | 2014-11-07 | 2016-06-01 | 深圳新飞通光电子技术有限公司 | Optical isolator |
| CN113433619A (en) * | 2021-06-11 | 2021-09-24 | 武汉联特科技股份有限公司 | Optical isolator, preparation method thereof and optical module |
-
2014
- 2014-03-12 CN CN201420110335.4U patent/CN203745678U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629386A (en) * | 2014-11-07 | 2016-06-01 | 深圳新飞通光电子技术有限公司 | Optical isolator |
| CN113433619A (en) * | 2021-06-11 | 2021-09-24 | 武汉联特科技股份有限公司 | Optical isolator, preparation method thereof and optical module |
| CN113433619B (en) * | 2021-06-11 | 2023-09-29 | 武汉联特科技股份有限公司 | Optical isolator, preparation method thereof and optical module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |