CN204790067U - Tunable filter of grating type - Google Patents
Tunable filter of grating type Download PDFInfo
- Publication number
- CN204790067U CN204790067U CN201520443209.5U CN201520443209U CN204790067U CN 204790067 U CN204790067 U CN 204790067U CN 201520443209 U CN201520443209 U CN 201520443209U CN 204790067 U CN204790067 U CN 204790067U
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- Prior art keywords
- catoptron
- collimating apparatus
- grating
- rotation element
- polarization rotation
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- 230000010287 polarization Effects 0.000 claims abstract description 31
- 230000003287 optical effect Effects 0.000 description 9
- 239000000835 fiber Substances 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
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Abstract
The utility model provides a pair of tunable filter of grating type, it is along light path input direction in proper order including incident collimater, grating, polarization rotation component, speculum and outgoing collimater, wherein, it is adjustable mirror to set up the speculum, thereby it makes the light signal of different wavelength export from the output collimater in proper order to rotate the speculum.
Description
Technical field
The utility model relates to a kind of adjustable filter, particularly a kind of adjustable filter of grating type.
Background technology
Optical filter (tunablefilter) is used to the instrument carrying out wavelength chooses, and it can pick out required wavelength from numerous wavelength, and the light except this wavelength will be rejected and passes through.As a kind of wavelength selecting device, optical filter plays more and more important effect in fiber optic communication systems.
Fig. 1 is the index path of the grating type adjustable filter of U.S. Patent application US6563977B1, as shown in Figure 1, this adjustable filter comprises the I/O fiber array 4 be arranged in order, lens 10, optical grating element 12, quarter wave plate 14 and catoptron 8, the incident optical signal inputted from the input optical fibre of I/O fiber array 4 is converted to parallel optical signal after lens 10 collimate, this parallel optical signal takes in grating 12, inject quarter wave plate after grating 12 diffraction after, after being reflected back quarter wave plate 14 via catoptron 8, the polarization state changing light signal reduces Polarization Dependent Loss with this, this light signal is again via the output optical fibre array exporting I/O fiber array 4 after grating 12 and lens 10 to.In above-mentioned patent, catoptron 8 is fixed, and the output optical fibre that the optical signals of its different wave length exported is different receives.
Summary of the invention
The utility model provides a kind of adjustable filter of grating type, and the light signal of different wave length is exported from output collimator successively.
In order to reach foregoing invention object, the technical scheme that the utility model provides is as follows: a kind of adjustable filter of grating type, and it comprises incident collimating apparatus, grating, polarization rotation element, catoptron and outgoing collimating apparatus successively along light path input direction; Described incident collimating apparatus converts incident light collimation to parallel signal light output to described grating, described grating receives the parallel signal light that incident collimating apparatus exports, and after this parallel signal light is divided into the light beam of different wave length, be diffracted into polarization rotation element, catoptron is exported to change the polarization state of light beam via polarization rotation element after, after the beam reflection of different wave length is returned the polarization state of polarization rotation element change light beam by described catoptron, export the light beam of required wavelength to outgoing collimating apparatus, the light beam of its commplementary wave length exports and departs from outgoing collimating apparatus.
Wherein, preferred implementation is: described polarization rotation element is 3/4 wave plate or quarter wave plate.
Wherein, preferred implementation is: catoptron is adjustable mirror, the wavelength exported as required, and rotating mirror makes the light beam of required wavelength be received by outgoing collimating apparatus via after polarization rotation element.
Wherein, preferred implementation is: described catoptron is MEMS catoptron, or for having the catoptron with rotating MEMS catoptron identical function.
Grating type adjustable filter of the present utility model has the following advantages and good effect compared to prior art: in input path, before catoptron, arrange polarization rotation element, reduces the Polarization Dependent Loss of incident optical signal; Meanwhile, arranging catoptron is adjustable mirror, rotates catoptron thus the light signal of different wave length is exported from output collimator successively.
Accompanying drawing explanation
Fig. 1 is the light channel structure schematic diagram of existing grating type adjustable filter.
Fig. 2 is the light channel structure schematic diagram of adjustable filter of the present utility model.
Embodiment
For making there is further understanding to the purpose of this utility model, structural attitude and function thereof, accompanying drawing is coordinated to be described in detail as follows.Should be appreciated that the specific embodiment described by this part only in order to explain the utility model, and can be not used in restriction the utility model.
Please refer to Fig. 2, Fig. 2 is the light channel structure schematic diagram of the adjustable filter of grating type of the present utility model.It comprises incident collimating apparatus 20, grating 30, polarization rotation element 40, catoptron 50 and outgoing collimating apparatus 60 successively along light path input direction.Described incident collimating apparatus 20 converts incident light collimation to parallel signal light output to described grating 30, described grating 30 receives the parallel signal light that incident collimating apparatus 20 exports, and after this parallel signal light is divided into the light beam of different wave length, be diffracted into polarization rotation element 40, catoptron 50 is exported to change the polarization state of light beam via polarization rotation element 40 after, the beam reflection of different wave length is returned after polarization rotation element 40 changes the polarization state of light beam by described catoptron 50, export the light beam of required wavelength to outgoing collimating apparatus 60, the light beam of its commplementary wave length exports and departs from outgoing collimating apparatus 60.
Wherein, described polarization rotation element 40 is 3/4 wave plate or quarter wave plate.
Wherein, catoptron 50 is adjustable mirror, the wavelength exported as required, and rotating mirror 50 makes the light beam of required wavelength be received by outgoing collimating apparatus 60 via after polarization rotation element 40.Described catoptron 50 is MEMS catoptron, or for having the catoptron with rotating MEMS catoptron identical function.
Grating type adjustable filter of the present utility model has the following advantages and good effect compared to prior art: in input path, arranges polarization rotation element 40 before catoptron 50, reduces the Polarization Dependent Loss of incident optical signal; Meanwhile, catoptron 50 is set for adjustable mirror, rotates catoptron 50 thus the light signal of different wave length is exported from output collimator 60 successively.
The above, be only the utility model most preferred embodiment, and not for limiting scope of the present utility model, all equivalences done according to the utility model claim change or modify, and are all the utility model and contain.
Claims (4)
1. an adjustable filter for grating type, it comprises incident collimating apparatus, grating, polarization rotation element, catoptron and outgoing collimating apparatus successively along light path input direction; It is characterized in that: described incident collimating apparatus converts incident light collimation to parallel signal light output to described grating, described grating receives the parallel signal light that incident collimating apparatus exports, and after this parallel signal light is divided into the light beam of different wave length, be diffracted into polarization rotation element, catoptron is exported to change the polarization state of light beam via polarization rotation element after, after the beam reflection of different wave length is returned the polarization state of polarization rotation element change light beam by described catoptron, export the light beam of required wavelength to outgoing collimating apparatus, the light beam of its commplementary wave length exports and departs from outgoing collimating apparatus.
2. the adjustable filter of a kind of grating type as claimed in claim 1, is characterized in that: described polarization rotation element is 3/4 wave plate or quarter wave plate.
3. the adjustable filter of a kind of grating type as claimed in claim 1, is characterized in that: catoptron is adjustable mirror, the wavelength exported as required, rotating mirror makes the light beam of required wavelength be received by outgoing collimating apparatus via after polarization rotation element.
4. the adjustable filter of a kind of grating type as claimed in claim 3, is characterized in that: described catoptron is MEMS catoptron, or for having the catoptron with rotating MEMS catoptron identical function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443209.5U CN204790067U (en) | 2015-06-25 | 2015-06-25 | Tunable filter of grating type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443209.5U CN204790067U (en) | 2015-06-25 | 2015-06-25 | Tunable filter of grating type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204790067U true CN204790067U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520443209.5U Expired - Fee Related CN204790067U (en) | 2015-06-25 | 2015-06-25 | Tunable filter of grating type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204790067U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449506A (en) * | 2015-12-31 | 2016-03-30 | 深圳新飞通光电子技术有限公司 | Tunable laser system |
| CN114089481A (en) * | 2021-11-25 | 2022-02-25 | 深圳市欧亿光电技术有限公司 | Novel wavelength division multiplexer adopting optical waveguide integration technology |
-
2015
- 2015-06-25 CN CN201520443209.5U patent/CN204790067U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449506A (en) * | 2015-12-31 | 2016-03-30 | 深圳新飞通光电子技术有限公司 | Tunable laser system |
| CN105449506B (en) * | 2015-12-31 | 2018-10-26 | 深圳新飞通光电子技术有限公司 | A kind of tunable laser system |
| CN114089481A (en) * | 2021-11-25 | 2022-02-25 | 深圳市欧亿光电技术有限公司 | Novel wavelength division multiplexer adopting optical waveguide integration technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: 518118 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |