CN105005150A - Folding type 90-degree spatial optical hybrid - Google Patents
Folding type 90-degree spatial optical hybrid Download PDFInfo
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- CN105005150A CN105005150A CN201510552548.1A CN201510552548A CN105005150A CN 105005150 A CN105005150 A CN 105005150A CN 201510552548 A CN201510552548 A CN 201510552548A CN 105005150 A CN105005150 A CN 105005150A
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention belongs to the optical communication field, and relates to a folding type 90-degree spatial optical hybrid. The optical hybrid is mainly composed of a crystal (11), a polarization splitting prism (6), an isosceles rectangular prism (14), quarter-wave plates (10, 12), a half-wave plate (9) and isosceles rectangular prisms (5, 13, 15). The coherent hybrid frequency of signal light (7) and local oscillator light (8) is realized by using a crystal birefringence light splitting principle, and after hybrid frequency, four paths of coherent light (1, 2, 3, 4) are output. The folding type 90-degree spatial optical hybrid is mainly applied to a spatial coherent laser communication reception system.
Description
Technical field
The present invention relates to a kind of folded form 90 degree of spatial light frequency mixer, realize flashlight and local oscillator light and to be concerned with mixing.Be applied to spatial coherent laser communication receiving system, belong to technical field of photo communication.
Background technology
Spatial coherent laser communication has higher detection sensitivity, good confidentiality because of it and is beneficial to many-sided advantages such as small light design, is following interplanetary two-forty, Large Copacity information transmits a kind of technological means of great potential.Spatial coherent laser communication utilizes local oscillator light and flashlight to be concerned with mixing, improves the general power after flashlight and local oscillator optical mixing by increasing local oscillation optical power, thus reaches the minimum power that detector can detect.The effect of spatial light frequency mixer makes flashlight and local oscillator light be concerned with mixing, plays the effect of forming a connecting link in spatial coherence receiving system.Optical mixer unit is mainly used in optical fiber communication and microwave communication at present, and technology relative maturity.Be applied to spatial light frequency mixer in spatial coherent laser communication receiving system due to its singularity, be different from the optical mixer unit in optical fiber communication and microwave communication, current technology is also immature, does not have shaped article both at home and abroad.
The folded form that the present invention relates to 90 degree of spatial light frequency mixer, utilize Crystal Birefringence Phenomenon to realize the relevant mixing of flashlight and local oscillator light.Compared with a kind of 90 degree of phase shifted light frequency mixer (CN201320783503), light-dividing principle and version difference.Compared with a kind of optical mixer for spatial coherent laser communication (CN201110022398), light-dividing principle is different from version.The feature that the present invention utilizes crystal extinction ratio high, is conducive to the signal to noise ratio (S/N ratio) improving spatial coherence receiving system.And structure is simple, be beneficial to small light design.
Summary of the invention
The object of the invention is to provide a kind of folded form 90 degree of spatial light frequency mixer, is applied to spatial coherent laser communication receiving system.Flashlight and local oscillator light can be concerned with mixing by this device, export four road coherent lights after mixing.
Technical scheme of the present invention is: the invention provides a kind of folded form 90 degree of spatial light frequency mixer, by crystal (11), polarization splitting prism (6), etc. girdle prism (14), quarter-wave plate (10,12), 1/2nd wave plates (9) and isosceles right-angle prism (5,13,15) form.Utilize crystal birefringence light-dividing principle, realize flashlight (7) mixing relevant with local oscillator light (8), after mixing, export four road coherent lights (1,2,3,4).
Above-mentioned waits girdle prism (14) two waist angle to be 90 degree.
Above-mentioned crystal (11) is uniaxial crystal.
Above-mentioned quarter-wave plate (10) right side and 1/2nd wave plates (9) right side bond to crystal (11) left side.
Above-mentioned quarter-wave plate (12) left side bonds to crystal (11) right side.
The technical problem underlying that the present invention can solve and good effect thereof are:
1, achieve flashlight and local oscillator light to be concerned with mixing.
2, light channel structure is compact is beneficial to volume Miniaturization Design.
3, spatial coherent laser communication receiving system is applied to, for system provides reliable spatial light mixing device.
Accompanying drawing explanation
Accompanying drawing is folded form 90 degree of spatial light frequency mixer schematic diagram;
Drawing reference numeral illustrates: the coherent light that 1-exports; The coherent light that 2-exports; The coherent light that 3-exports; The coherent light that 4-exports; 5-isosceles right-angle prism; 6-polarization splitting prism; 7-flashlight; 8-local oscillator light; 9-1/2nd wave plate; 10-quarter-wave plate; 11-crystal; 12-quarter-wave plate; 13-isosceles right-angle prism; The girdle prisms such as 14-; 15-isosceles right-angle prism;
Embodiment
As shown in the figure, folded form of the present invention 90 degree of spatial light frequency mixer by crystal (11), polarization splitting prism (6), etc. girdle prism (14), quarter-wave plate (10,12), 1/2nd wave plates (9) and isosceles right-angle prism (5,13,15) form.Flashlight (7) and local oscillator light (8), after folded form 90 degree of spatial light frequency mixer, are exported by (1), (2), (3) and (4) four ports.
Crystal (11) right side bonds to quarter-wave plate (12) left side, quarter-wave plate (12) right side bond to isosceles right-angle prism (13) right-angle surface, etc. girdle prism (14) left side and isosceles right-angle prism (15) right-angle surface.Isosceles right-angle prism (14) another right-angle surface such as to bond at girdle prism (14) front end face, and isosceles right-angle prism (15) another right-angle surface such as to bond at girdle prism (14) rear end face.Crystal (11) centre position, left side and 1/2nd wave plates (9) right side are bonded together, / 2nd wave plates (9) left side bonds to polarization splitting prism (6) right side, polarization splitting prism (6) left side bonds to isosceles right-angle prism (5) right-hand member right-angle surface, and quarter-wave plate (10) right side bonds to crystal (11) left side upper position first half.
Claims (4)
1. a folded form 90 degree of spatial light frequency mixer, it is characterized in that: by crystal (11), polarization splitting prism (6), etc. girdle prism (14), quarter-wave plate (10,12), 1/2nd wave plates (9) and isosceles right-angle prism (5,13,15) form.Utilize crystal birefringence light-dividing principle, realize flashlight (7) mixing relevant with local oscillator light (8), after mixing, export four road coherent lights (1,2,3,4).
2. folded form according to claim 1 90 degree of spatial light frequency mixer, is characterized in that: described waits girdle prism (14) two waist angle to be 90 degree.
3. folded form according to claim 1 90 degree of spatial light frequency mixer, is characterized in that: described crystal (11) is uniaxial crystal.
4. folded form according to claim 1 90 degree of spatial light frequency mixer, is characterized in that: be applied to spatial coherent laser communication receiving system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552548.1A CN105005150A (en) | 2015-09-02 | 2015-09-02 | Folding type 90-degree spatial optical hybrid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552548.1A CN105005150A (en) | 2015-09-02 | 2015-09-02 | Folding type 90-degree spatial optical hybrid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105005150A true CN105005150A (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510552548.1A Pending CN105005150A (en) | 2015-09-02 | 2015-09-02 | Folding type 90-degree spatial optical hybrid |
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| CN (1) | CN105005150A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020208581A1 (en) * | 2019-04-09 | 2020-10-15 | Bifrost Communications ApS | Optical transmission system, optical receiver and method of combining and receiving an optical signal |
| US11552713B1 (en) | 2021-10-07 | 2023-01-10 | Bifrost Communications ApS | Optical transmission systems, receivers, and devices, and methods of combining and receiving optical signals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221728A (en) * | 2010-04-14 | 2011-10-19 | 昂纳信息技术（深圳）有限公司 | Optical mixer of free space |
| CN104297936A (en) * | 2014-07-28 | 2015-01-21 | 中国科学院西安光学精密机械研究所 | Free space 90-degree optical mixer |
| CN204855956U (en) * | 2015-09-02 | 2015-12-09 | 长春理工大学 | 90 degrees space optical mixer units of folded form |
-
2015
- 2015-09-02 CN CN201510552548.1A patent/CN105005150A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221728A (en) * | 2010-04-14 | 2011-10-19 | 昂纳信息技术（深圳）有限公司 | Optical mixer of free space |
| CN104297936A (en) * | 2014-07-28 | 2015-01-21 | 中国科学院西安光学精密机械研究所 | Free space 90-degree optical mixer |
| CN204855956U (en) * | 2015-09-02 | 2015-12-09 | 长春理工大学 | 90 degrees space optical mixer units of folded form |
Non-Patent Citations (1)
| Title |
|---|
| 郑阳等: "基于相干激光通信的空间光混频器光机结构设计", 《光学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020208581A1 (en) * | 2019-04-09 | 2020-10-15 | Bifrost Communications ApS | Optical transmission system, optical receiver and method of combining and receiving an optical signal |
| US11552713B1 (en) | 2021-10-07 | 2023-01-10 | Bifrost Communications ApS | Optical transmission systems, receivers, and devices, and methods of combining and receiving optical signals |
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Application publication date: 20151028 |
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