CN111025668A - Optical device integrating polarization coherent beam splitting - Google Patents
Optical device integrating polarization coherent beam splitting Download PDFInfo
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- CN111025668A CN111025668A CN201911424083.6A CN201911424083A CN111025668A CN 111025668 A CN111025668 A CN 111025668A CN 201911424083 A CN201911424083 A CN 201911424083A CN 111025668 A CN111025668 A CN 111025668A
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- fiber collimator
- beam splitter
- input single
- free space
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- 230000010287 polarization Effects 0.000 title claims abstract description 40
- 230000003287 optical effect Effects 0.000 title claims abstract description 25
- 230000001427 coherent effect Effects 0.000 title claims abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 90
- 230000028161 membrane depolarization Effects 0.000 claims abstract description 20
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims description 6
- 230000002999 depolarising effect Effects 0.000 claims 5
- 238000005538 encapsulation Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides an optical device integrating polarization coherent beam splitting, wherein the following devices are arranged in a packaging shell, a first input single-fiber collimator, a polarizing plate, a depolarization beam splitter prism, a second polarization beam splitter and a second output double-fiber collimator are sequentially arranged along a first free space light path, a second input single-fiber collimator, the depolarization beam splitter prism, a first polarization beam splitter and a first output double-fiber collimator are sequentially arranged along a second free space light path, and the first free space light path is vertical to the second free space light path. Because the present case adopts free space optical path to transmit to and the device all integrates on encapsulating the casing, reduced the degree of difficulty that the optic fibre was handled, reduced the optic fibre management degree of difficulty, reduced the volume of module, effective reduce cost, and obtain more stable optical performance.
Description
Technical Field
The invention relates to the field of optical devices, in particular to an optical device integrating polarization coherent beam splitting.
Background
In the prior art, in order to realize polarization input, phase superposition interference and sub-beam splitting output, devices such as a polarizer, a coupler and a polarization beam splitter are generally adopted and connected through a fusion optical fiber, however, due to the design, polarization is difficult to manage, the whole module is large in size and high in cost, and performance is easily interfered by vibration, temperature and the like.
Disclosure of Invention
The invention aims to provide an optical device integrating a polarization coherent beam splitting function.
In order to achieve the purpose of the invention, the invention provides an optical device integrating polarization coherent beam splitting, which comprises a packaging shell, wherein the optical device is provided with a first input single-fiber collimator, a second input single-fiber collimator, a first output double-fiber collimator, a second output double-fiber collimator, a depolarization beam splitter prism, a polarizing plate, a first polarization beam splitter and a second polarization beam splitter on the packaging shell;
the depolarization beam splitting prism is provided with a beam splitting surface, the first input single-fiber collimator and the second input single-fiber collimator are respectively arranged on two sides of the extension direction of the beam splitting surface, and the first input single-fiber collimator and the second input single-fiber collimator are respectively arranged towards the depolarization beam splitting prism; the first output double-fiber collimator and the second output double-fiber collimator are respectively arranged at two sides of the extending direction of the light splitting surface and are respectively arranged towards the depolarization light splitting prism; the first input single-fiber collimator and the first output double-fiber collimator are positioned on the same side of the extension direction of the light splitting surface, and the second input single-fiber collimator and the second output double-fiber collimator are positioned on the same side of the extension direction of the light splitting surface; the first input single-fiber collimator, the polaroid, the depolarization beam splitter prism, the second polarization beam splitter and the second output double-fiber collimator are sequentially arranged along a first free space light path, the second input single-fiber collimator, the depolarization beam splitter prism, the first polarization beam splitter and the first output double-fiber collimator are sequentially arranged along a second free space light path, and the first free space light path is perpendicular to the second free space light path.
In a further embodiment, the polarizer is arranged at the output end of the first input single-fiber collimator.
In a further embodiment, the first polarization beam splitter is arranged at the input of the first output dual-fiber collimator.
In a further embodiment, the second polarization beam splitter is arranged at the input of the second output dual-fiber collimator.
In a further embodiment, the first polarization beam splitter is a wollaston prism or a birefringent crystal beam splitter.
In a further embodiment, the second polarization beam splitter is a wollaston prism or a birefringent crystal beam splitter.
It can be seen from the above that, based on the depolarization beam splitter prism, arrange first input single fiber collimator, second input single fiber collimator, first output double fiber collimator, second output double fiber collimator relatively for signal light and reference light superpose after getting into depolarization beam splitter prism and interfere, and output from double fiber collimator spectroscopically, because the present case adopts free space optical path to transmit, and the device all integrates on the encapsulation casing, reduced the degree of difficulty that the optic fibre was handled, reduce the optic fibre management degree of difficulty, reduced the volume of module, effective reduce cost, and obtain more stable optical performance.
Drawings
Fig. 1 is an optical path diagram of an embodiment of the optical device of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Referring to fig. 1, the optical device includes a package housing 1, and the optical device is provided with a first input single-fiber collimator 2, a second input single-fiber collimator 3, a first output dual-fiber collimator 5, a second output dual-fiber collimator 4, a depolarization beam splitter prism 7, a polarizer 6, a first polarization beam splitter 9, and a second polarization beam splitter 8 on the package housing 1.
The depolarization beam splitter prism 7 is provided with a beam splitting surface 71, the first input single-fiber collimator 2 and the second input single-fiber collimator 3 are respectively arranged on two sides of the extending direction of the beam splitting surface 71, the first input single-fiber collimator 2 and the second input single-fiber collimator 3 are respectively arranged towards the depolarization beam splitter prism 7, the first output double-fiber collimator 5 and the second output double-fiber collimator 4 are respectively arranged on two sides of the extending direction of the beam splitting surface 71, and the first output double-fiber collimator 5 and the second output double-fiber collimator 4 are respectively arranged towards the depolarization beam splitter prism 7. The first input single-fiber collimator 2 and the first output dual-fiber collimator 5 are located on the same side in the extending direction of the splitting plane 71, and the second input single-fiber collimator 3 and the second output dual-fiber collimator 4 are located on the same side in the extending direction of the splitting plane 71.
The first input single-fiber collimator 2, the polaroid 6, the depolarization beam splitter prism 7, the second polarization beam splitter 8 and the second output double-fiber collimator 4 are sequentially arranged along a first free space light path, the polaroid 6 is arranged at the output end of the first input single-fiber collimator 2, the second polarization beam splitter 8 is arranged at the input end of the second output double-fiber collimator 4, and the first free space light path and the extension direction of the beam splitting surface 71 form an included angle of 45 degrees. In this embodiment, the first polarization beam splitter 9 is implemented by a wollaston prism, or a birefringent crystal beam splitter may be used for polarization beam splitting
The second input single-fiber collimator 3, the depolarization beam splitter prism 7, the first polarization beam splitter 9 and the first output double-fiber collimator 5 are sequentially arranged along a second free space light path, the first free space light path is perpendicular to the second free space light path, the first polarization beam splitter 9 is arranged at the input end of the first output double-fiber collimator 5, the second polarization beam splitter 8 adopts a Wollaston prism, and certainly or a birefringent crystal beam splitter is adopted for polarization beam splitting.
The signal light is input by the second input single-fiber collimator 3, the reference light is input by the first input single-fiber collimator 2, linear polarization is obtained after polarization is performed by the polarizing film 6, the signal light and the reference light are overlapped in the depolarization beam splitter prism 7(NPBS) to generate interference, the interference is respectively input to the first output double-fiber collimator 5 and the second output double-fiber collimator 4, and the Wollaston prism is arranged at the input end of the output double-fiber collimator, so that the generated interference light is divided into two linear polarization beams, and the two linear polarization beams are respectively coupled into the double-output optical fibers.
It can be seen from the above that, based on the depolarization beam splitter prism, arrange first input single fiber collimator, second input single fiber collimator, first output double fiber collimator, second output double fiber collimator relatively for signal light and reference light superpose after getting into depolarization beam splitter prism and interfere, and output from double fiber collimator spectroscopically, because the present case adopts free space optical path to transmit, and the device all integrates on the encapsulation casing, reduced the degree of difficulty that the optic fibre was handled, reduce the optic fibre management degree of difficulty, reduced the volume of module, effective reduce cost, and obtain more stable optical performance.
Claims (6)
1. An optical device integrating polarization coherent beam splitting comprises a packaging shell, and is characterized in that a first input single-fiber collimator, a second input single-fiber collimator, a first output double-fiber collimator, a second output double-fiber collimator, a depolarization beam splitter prism, a polarizing plate, a first polarization beam splitter and a second polarization beam splitter are arranged on the packaging shell of the optical device;
the depolarizing beam splitter prism is provided with a beam splitting surface, the first input single-fiber collimator and the second input single-fiber collimator are respectively arranged on two sides of the extending direction of the beam splitting surface, and the first input single-fiber collimator and the second input single-fiber collimator are respectively arranged towards the depolarizing beam splitter prism;
the first output dual-fiber collimator and the second output dual-fiber collimator are respectively arranged at two sides of the extending direction of the light splitting surface and respectively face the depolarizing light splitting prism;
the first input single-fiber collimator and the first output double-fiber collimator are positioned on the same side of the extension direction of the light splitting surface, and the second input single-fiber collimator and the second output double-fiber collimator are positioned on the same side of the extension direction of the light splitting surface;
the first input single-fiber collimator, the polarizing plate, the depolarizing beam splitter prism, the second polarizing beam splitter and the second output double-fiber collimator are sequentially arranged along a first free space light path, the second input single-fiber collimator, the depolarizing beam splitter prism, the first polarizing beam splitter and the first output double-fiber collimator are sequentially arranged along a second free space light path, and the first free space light path is perpendicular to the second free space light path.
2. The optical device of claim 1, wherein:
the polaroid is arranged on the output end of the first input single-fiber collimator.
3. The optical device of claim 1, wherein:
the first polarization beam splitter is arranged at the input end of the first output dual-fiber collimator.
4. The optical device of claim 1, wherein:
the second polarization beam splitter is arranged at the input end of the second output dual-fiber collimator.
5. The optical device according to any one of claims 1 to 4, wherein:
the first polarization beam splitter is a Wollaston prism or a birefringent crystal beam splitter.
6. The optical device according to any one of claims 1 to 4, wherein:
the second polarization beam splitter is a Wollaston prism or a birefringent crystal beam splitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911424083.6A CN111025668B (en) | 2019-12-30 | 2019-12-30 | Optical device integrating polarization coherent beam splitting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911424083.6A CN111025668B (en) | 2019-12-30 | 2019-12-30 | Optical device integrating polarization coherent beam splitting |
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| CN111025668A true CN111025668A (en) | 2020-04-17 |
| CN111025668B CN111025668B (en) | 2023-04-25 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020126363A1 (en) * | 2001-01-24 | 2002-09-12 | Ziv Ofer R. | Optical path switch and method of using thereof |
| CN102495477A (en) * | 2011-12-07 | 2012-06-13 | 长春理工大学 | Optical mixer |
| CN104897048A (en) * | 2015-06-12 | 2015-09-09 | 哈尔滨工业大学 | Quadrature error-free single-path polarization interference and double-Wollaston prism light-splitting type homodyne laser vibration meter |
| CN108132500A (en) * | 2018-01-30 | 2018-06-08 | 福建天蕊光电有限公司 | A kind of closed loop optical circulator |
| CN208060025U (en) * | 2018-04-16 | 2018-11-06 | 西北工业大学 | Realize the light path of two width interference patterns of the polarization state and phase that measure arbitrary beam |
| CN209803385U (en) * | 2019-05-21 | 2019-12-17 | 武汉嘉迅光电有限公司 | 2X 2 channel optical switch based on liquid crystal technology |
| US20190391406A1 (en) * | 2016-12-19 | 2019-12-26 | Peijuan Chen | Miniaturized optical circulator |
-
2019
- 2019-12-30 CN CN201911424083.6A patent/CN111025668B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020126363A1 (en) * | 2001-01-24 | 2002-09-12 | Ziv Ofer R. | Optical path switch and method of using thereof |
| CN102495477A (en) * | 2011-12-07 | 2012-06-13 | 长春理工大学 | Optical mixer |
| CN104897048A (en) * | 2015-06-12 | 2015-09-09 | 哈尔滨工业大学 | Quadrature error-free single-path polarization interference and double-Wollaston prism light-splitting type homodyne laser vibration meter |
| US20190391406A1 (en) * | 2016-12-19 | 2019-12-26 | Peijuan Chen | Miniaturized optical circulator |
| CN108132500A (en) * | 2018-01-30 | 2018-06-08 | 福建天蕊光电有限公司 | A kind of closed loop optical circulator |
| CN208060025U (en) * | 2018-04-16 | 2018-11-06 | 西北工业大学 | Realize the light path of two width interference patterns of the polarization state and phase that measure arbitrary beam |
| CN209803385U (en) * | 2019-05-21 | 2019-12-17 | 武汉嘉迅光电有限公司 | 2X 2 channel optical switch based on liquid crystal technology |
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| CN111025668B (en) | 2023-04-25 |
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Effective date of registration: 20240511 Address after: Room 301, Building 1, No. 399 Chuangxin Third Road, Tangjiawan Town, High tech Zone, Zhuhai City, Guangdong Province, 519000 Patentee after: ZHUHAI ARCADIA OPTRONIX Co.,Ltd. Country or region after: China Address before: No. 399, Chuangshan Road, Tangjiawan Town, high tech Zone, Zhuhai City, Guangdong Province, 519000 Patentee before: ADVANCED FIBER RESOURCES (ZHUHAI) Ltd. Country or region before: China |