CN105068258A - Symmetrical type 90-dgree spatial optical mixer - Google Patents
Symmetrical type 90-dgree spatial optical mixer Download PDFInfo
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- CN105068258A CN105068258A CN201510552465.2A CN201510552465A CN105068258A CN 105068258 A CN105068258 A CN 105068258A CN 201510552465 A CN201510552465 A CN 201510552465A CN 105068258 A CN105068258 A CN 105068258A
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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
Abstract
The invention relates to the field of optical communication and provides a symmetrical type 90-dgree spatial optical mixer. The mixer mainly comprises crystals (7, 12), polarization splitting prisms (1, 16), quarter-wave plates (9, 10, 13), half-wave plates (5, 8, 11, 14) and isosceles right-angle prisms (2, 18). Based on the crystalline double refraction splitting principle, the mixer realizes coherent mixing of signal light (6) and local oscillation light (19) and outputs four paths of coherent light (3, 4, 15, 17) after mixing. The symmetrical type 90-dgree spatial optical mixer is mainly applied to spatial coherent laser communication receiving systems.
Description
Technical field
The present invention relates to a kind of symmetric 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 highly sensitive, and message capacity is large, Different Modulations can be adopted to apply more flexible.Spatial coherent laser communication, as a kind of technological means of interplanetary two-forty information great potential, has become domestic and international study hotspot at present.Optical mixer unit is as the core parts of coherent laser communication receiving system, and its status is more aobvious, and it is important.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 symmetric 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 and version difference.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 symmetric 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 symmetric form 90 degree of spatial light frequency mixer, its special character is that symmetric form 90 degree of spatial light frequency mixer are by crystal (7,12), polarization splitting prism (1,16), quarter-wave plate (9,10,13), 1/2nd wave plates (5,8,11,14) and isosceles right-angle prism (2,18) composition.Utilize crystal birefringence light-dividing principle, realize flashlight (6) mixing relevant with local oscillator light (19), after mixing, export four road coherent lights (3,4,15,17).
Above-mentioned crystal (7) is the uniaxial crystal that two block of material are identical with crystal (12), and the principal plane riding position of two pieces of crystal is in same plane.
Above-mentioned quarter-wave plate (9) right side is coated with reflectance coating, and quarter-wave plate (10) left side is coated with reflectance coating.Clearance is left between quarter-wave plate (9) right side and quarter-wave plate (10) left 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 symmetric form 90 degree of spatial light frequency mixer schematic diagram;
Drawing reference numeral illustrates: 1-polarization splitting prism; 2-isosceles right-angle prism; The coherent light that 3-exports; The coherent light that 4-exports; 5-1/2nd wave plate; 6-flashlight; 7-crystal; 8-1/2nd wave plate; 9-quarter-wave plate; 10-quarter-wave plate; 11-1/2nd wave plate; 12-crystal; 13-quarter-wave plate; 14-1/2nd wave plate; The coherent light that 15-exports; 16-polarization splitting prism; The coherent light that 17-exports; 18-isosceles right-angle prism; 19-local oscillator light;
Embodiment
As shown in the figure, symmetric form of the present invention 90 degree of spatial light frequency mixer are by crystal (7,12), polarization splitting prism (1,16), quarter-wave plate (9,10,13), 1/2nd wave plates (5,8,11,14) and isosceles right-angle prism (2,18) composition.Flashlight (6) and local oscillator light (19), after symmetric form 90 degree of spatial light frequency mixer, are exported by (3), (4), (15) and (17) four ports.
Crystal (7) centre position, left side and 1/2nd wave plates (5) right side bond together, / 2nd wave plates (5) left side bonds to polarization splitting prism (1) right side, and polarization splitting prism (1) left side bonds to isosceles right-angle prism (2) right-hand member right-angle surface.Crystal (7) right side and 1/2nd wave plates (8) left side, quarter-wave plate (9) left side and 1/2nd wave plates (11) left side bond together./ 2nd wave plates (8) right side, quarter-wave plate (10) right side and 1/2nd wave plates (11) right side and crystal (12) left side are bonded together.Quarter-wave plate (9) right side is coated with reflectance coating, quarter-wave plate (10) left side is coated with reflectance coating, leaves clearance between quarter-wave plate (9) right side and quarter-wave plate (10) left side.Position, place, crystal (12) back, right side 1/3rd and 1/2nd wave plates (13) left side are bonded together.Crystal (12) centre position, right side and 1/2nd wave plates (14) left side are bonded together./ 2nd wave plates (14) right side bonds to polarization splitting prism (16) left side, and polarization splitting prism (16) right side bonds to isosceles right-angle prism (18) left end right-angle surface.
Claims (4)
1. a symmetric form 90 degree of spatial light frequency mixer, it is characterized in that: by crystal (7,12), polarization splitting prism (1,16), quarter-wave plate (9,10,13), 1/2nd wave plates (5,8,11,14) and isosceles right-angle prism (2,18) composition.Utilize crystal birefringence light-dividing principle, realize flashlight (6) mixing relevant with local oscillator light (19), after mixing, export four road coherent lights (3,4,15,17).
2. symmetric form according to claim 1 90 degree of spatial light frequency mixer, it is characterized in that: described crystal (7) is the uniaxial crystal that two block of material are identical with crystal (12), and the principal plane riding position of two pieces of crystal is in same plane.
3. symmetric form according to claim 1 90 degree of spatial light frequency mixer, is characterized in that: described quarter-wave plate (9) right side is coated with reflectance coating and quarter-wave plate (10) left side is coated with reflectance coating.
4. symmetric 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 |
|---|---|---|---|
| CN201510552465.2A CN105068258A (en) | 2015-09-02 | 2015-09-02 | Symmetrical type 90-dgree spatial optical mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552465.2A CN105068258A (en) | 2015-09-02 | 2015-09-02 | Symmetrical type 90-dgree spatial optical mixer |
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| Publication Number | Publication Date |
|---|---|
| CN105068258A true CN105068258A (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510552465.2A Pending CN105068258A (en) | 2015-09-02 | 2015-09-02 | Symmetrical type 90-dgree spatial optical mixer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353520A (en) * | 2015-11-30 | 2016-02-24 | 长春理工大学 | Spatial optical 90-degree mixer with high mixing efficiency |
Citations (4)
| 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 |
| US20130114956A1 (en) * | 2011-11-07 | 2013-05-09 | Electronics And Telecommunications Research Institute | Dpsk optical receiver |
| CN103176278A (en) * | 2013-03-08 | 2013-06-26 | 华中科技大学 | Optical mixer for reflective coherent receivers |
| CN205003378U (en) * | 2015-09-02 | 2016-01-27 | 长春理工大学 | 90 degrees space optical mixer on symmetry type |
-
2015
- 2015-09-02 CN CN201510552465.2A patent/CN105068258A/en active Pending
Patent Citations (4)
| 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 |
| US20130114956A1 (en) * | 2011-11-07 | 2013-05-09 | Electronics And Telecommunications Research Institute | Dpsk optical receiver |
| CN103176278A (en) * | 2013-03-08 | 2013-06-26 | 华中科技大学 | Optical mixer for reflective coherent receivers |
| CN205003378U (en) * | 2015-09-02 | 2016-01-27 | 长春理工大学 | 90 degrees space optical mixer on symmetry type |
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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353520A (en) * | 2015-11-30 | 2016-02-24 | 长春理工大学 | Spatial optical 90-degree mixer with high mixing efficiency |
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Application publication date: 20151118 |