CN111025668B - Optical device integrating polarization coherent beam splitting - Google Patents
Optical device integrating polarization coherent beam splitting Download PDFInfo
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- CN111025668B CN111025668B CN201911424083.6A CN201911424083A CN111025668B CN 111025668 B CN111025668 B CN 111025668B CN 201911424083 A CN201911424083 A CN 201911424083A CN 111025668 B CN111025668 B CN 111025668B
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- fiber collimator
- beam splitter
- input single
- output double
- prism
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- 230000010287 polarization Effects 0.000 title claims abstract description 40
- 230000003287 optical effect Effects 0.000 title claims abstract description 35
- 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 22
- 239000013078 crystal Substances 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000002999 depolarising effect Effects 0.000 description 6
- 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 integrated polarization coherent beam splitting optical device, which is characterized in that a device is arranged in a packaging shell, wherein a first input single-fiber collimator, a polaroid, a depolarization beam splitting prism, a second polarization beam splitting component and a second output double-fiber collimator are sequentially arranged along a first free space optical path, a second input single-fiber collimator, a depolarization beam splitting prism, a first polarization beam splitting component and a first output double-fiber collimator are sequentially arranged along a second free space optical path, and the first free space optical path is perpendicular to the second free space optical path. The free space optical path is adopted for transmission, and devices are integrated on the packaging shell, so that the difficulty of optical fiber processing is reduced, the difficulty of optical fiber management is reduced, the volume of a module is reduced, the cost is effectively reduced, and more stable optical performance is obtained.
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, superimposed interference and sub-beam output, devices such as a polarizer, a coupler, a polarization beam splitter and the like are usually adopted and are connected through fusion optical fibers, however, the design can cause that the polarization is difficult to manage, the whole module is large in size and high in cost, and the performance is easy to be 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 aim of the invention, the invention provides an optical device integrating polarization coherent beam splitting, which comprises an encapsulation 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 splitting prism, a polaroid, a first polarization beam splitting part and a second polarization beam splitting part;
the depolarization 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 at two sides of the beam splitting surface in the extending direction, and the first input single-fiber collimator and the second input single-fiber collimator are respectively arranged towards the depolarization beam splitter 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 extending 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 extending direction of the light splitting surface; the first input single-fiber collimator, the polarizing plate, the depolarizing beam splitter prism, the second polarization beam splitter and the second output double-fiber collimator are sequentially arranged along a first free space optical path, the second input single-fiber collimator, the depolarizing beam splitter prism, the first polarization beam splitter and the first output double-fiber collimator are sequentially arranged along a second free space optical path, and the first free space optical path is perpendicular to the second free space optical path.
Still further, a polarizer is disposed on the output end of the first input single fiber collimator.
In a further aspect, the first polarization beam splitter is disposed at an input end of the first output dual-fiber collimator.
In a further scheme, the second polarization beam splitter is arranged at the input end of the second output double-fiber collimator.
In a further aspect, the first polarization beam splitter is a wollaston prism or a birefringent crystal beam splitter.
In a further aspect, the second polarization beam splitter is a wollaston prism or a birefringent crystal beam splitter.
From the above, the first input single-fiber collimator, the second input single-fiber collimator, the first output double-fiber collimator and the second output double-fiber collimator are oppositely arranged based on the depolarization beam splitter prism, so that signal light and reference light enter the depolarization beam splitter prism to be overlapped and interfered, and are output from the double-fiber collimator in a beam splitting way.
Drawings
Fig. 1 is a light path diagram of an embodiment of an optical device of the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
Referring to fig. 1, the optical device includes a package case 1, and a first input single-fiber collimator 2, a second input single-fiber collimator 3, a first output double-fiber collimator 5, a second output double-fiber collimator 4, a depolarizing prism 7, a polarizing plate 6, a first polarizing beam splitter 9, and a second polarizing beam splitter 8 are provided on the package case 1.
The depolarizing prism 7 is provided with a light splitting surface 71, the first input single-fiber collimator 2 and the second input single-fiber collimator 3 are respectively disposed at both sides of the extending direction of the light splitting surface 71, the first input single-fiber collimator 2 and the second input single-fiber collimator 3 are respectively disposed toward the depolarizing prism 7, the first output double-fiber collimator 5 and the second output double-fiber collimator 4 are respectively disposed at both sides of the extending direction of the light splitting surface 71, and the first output double-fiber collimator 5 and the second output double-fiber collimator 4 are respectively disposed toward the depolarizing prism 7. The first input single-fiber collimator 2 and the first output double-fiber collimator 5 are located on the same side in the extending direction of the light splitting surface 71, and the second input single-fiber collimator 3 and the second output double-fiber collimator 4 are located on the same side in the extending direction of the light splitting surface 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 optical 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 an included angle of 45 degrees is formed between the first free space optical path and the extending direction of the beam splitter surface 71. In the present embodiment, the first polarization beam splitter 9 adopts a Wollaston prism, or adopts a birefringent crystal beam splitter to perform 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 optical path, the first free space optical path is perpendicular to the second free space optical 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 polarization beam splitting can be performed by adopting a birefringent crystal beam splitter.
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, the linearly polarized light is obtained after being polarized by the polarizing plate 6, the signal light and the reference light are overlapped by the depolarization beam splitter prism 7 (NPBS) to generate interference, and the interference light 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 beams of linearly polarized light, and the two beams of linearly polarized light are respectively coupled into the double-output optical fibers.
From the above, the first input single-fiber collimator, the second input single-fiber collimator, the first output double-fiber collimator and the second output double-fiber collimator are oppositely arranged based on the depolarization beam splitter prism, so that signal light and reference light enter the depolarization beam splitter prism to be overlapped and interfered, and are output from the double-fiber collimator in a beam splitting way.
Claims (6)
1. The integrated polarization coherent beam splitting optical device comprises an encapsulation 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 splitting prism, a polaroid, a first polarization beam splitting component and a second polarization beam splitting component are arranged on the encapsulation shell;
the depolarization 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 at two sides of the beam splitting surface in the extending direction, and the first input single-fiber collimator and the second input single-fiber collimator are respectively arranged towards the depolarization beam splitter 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 the first output double-fiber collimator and the second output double-fiber collimator 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 light splitting surface in the extending direction, and the second input single-fiber collimator and the second output double-fiber collimator are positioned on the same side of the light splitting surface in the extending direction;
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 optical 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 optical path, and the first free space optical path is perpendicular to the second free space optical path;
the reference light is input by the first input single-fiber collimator and enters the depolarization beam splitter prism after passing through the polarizing plate, the signal light is input by the second input single-fiber collimator and enters the depolarization beam splitter prism, the signal light and the reference light are overlapped and interfered by the depolarization beam splitter prism, the generated interference light is respectively input to the first polarization beam splitter and the second polarization beam splitter, the first polarization beam splitter splits the interference light into two linearly polarized light beams, the two linearly polarized light beams are respectively coupled into the first output double-fiber collimator, the second polarization beam splitter splits the interference light into two linearly polarized light beams, and the two linearly polarized light beams are respectively coupled into the second output double-fiber collimator.
2. An optical device as claimed in claim 1, wherein:
the polarizer is disposed on the output end of the first input single fiber collimator.
3. An optical device as claimed in claim 1, wherein:
the first polarization beam splitter is arranged at the input end of the first output double-fiber collimator.
4. An optical device as claimed in claim 1, wherein:
the second polarization beam splitter is arranged at the input end of the second output double-fiber collimator.
5. An 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. An 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911424083.6A CN111025668B (en) | 2019-12-30 | 2019-12-30 | Optical device integrating polarization coherent beam splitting |
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| CN201911424083.6A CN111025668B (en) | 2019-12-30 | 2019-12-30 | Optical device integrating polarization coherent beam splitting |
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| CN111025668B true CN111025668B (en) | 2023-04-25 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6639706B2 (en) * | 2001-01-24 | 2003-10-28 | Kollsman, Inc. | Optical path switch and method of using thereof |
| CN102495477A (en) * | 2011-12-07 | 2012-06-13 | 长春理工大学 | Optical mixer |
| CN104897048B (en) * | 2015-06-12 | 2018-02-27 | 哈尔滨工业大学 | The interference of single channel linear polarization and double Wo Lasite prismatic decomposition formula homodyne laser vibration measurers without quadrature error |
| WO2018113463A1 (en) * | 2016-12-19 | 2018-06-28 | 陈佩娟 | Miniaturized optical circulator |
| CN108132500B (en) * | 2018-01-30 | 2020-02-07 | 福建天蕊光电有限公司 | Closed loop optical circulator |
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- 2019-12-30 CN CN201911424083.6A patent/CN111025668B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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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 |