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Electric-control phase-shift crystal birefringence free space optical bridge

A technology of crystal birefringence and optical bridge, which is applied in the direction of instruments, optics, electrical components, etc., and can solve problems such as poor stability, many components, and large insertion loss

Inactive Publication Date: 2009-09-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the optical quality and assembly requirements of the bridge are very strict, the stability is poor, and there are many components (13 pieces), and the insertion loss is relatively large

Method used

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  • Electric-control phase-shift crystal birefringence free space optical bridge
  • Electric-control phase-shift crystal birefringence free space optical bridge
  • Electric-control phase-shift crystal birefringence free space optical bridge

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Embodiment Construction

[0014] specific implementation plan

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings. Here, calcite is used as the material for making the crystal birefringent plate, but this should not limit the protection scope of the present invention.

[0016] see first figure 1 , figure 1 It is a structural schematic diagram of the electronically controlled phase-shift crystal birefringence free-space optical bridge of the present invention. It can be seen from the figure that the electronically controlled phase-shift crystal birefringent free-space optical bridge of the present invention is composed of four crystal birefringent optical plates with the same structure, an analyzer crystal birefringent plate and an electronically controlled phase shift 2×2 array. Along the traveling direction of light are: stacked first crystal birefringent optical plate 3 and second crystal birefringent optical plate 4, electronically...

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Abstract

The invention relates to an electric-control phase-shift crystal birefringence free space optical bridge, which consists of four crystal birefringence optical flats with same structures, a bias-detecting crystal birefringence optical flat, and an electric-control phase-shift 2*2 array. The optical bridge has the advantages of simple and compact structure, stable and reliable performance, less loss and the like. The electric-control phase-shift crystal birefringence free space optical bridge is particularly applicable to free space laser coherent communication, and has practical meaning for a satellite-borne laser communication terminal to achieve miniaturization, light weight, low power consumption and high code rate.

Description

technical field [0001] The present invention relates to free-space laser communication, in particular to an electronically controlled phase-shift crystal birefringence free-space optical bridge, which is mainly used for spatially combining laser communication signal beams and local oscillator laser beams in coherent optical communication receivers and generating 90 Four-channel synthetic beam with 1-degree phase shift to realize spatial 2×4 bridging. Background technique [0002] Spaceborne laser communication terminals used for free space laser communication between satellites or between satellites and ground stations need to achieve miniaturization, light weight, low power consumption and high bit rate. There are two types of laser communication systems: one is the non-coherent laser communication system, the optical transmitting end adopts light intensity modulation, and the optical receiving end adopts direct detection; the other is the coherent laser communication syste...

Claims

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Application Information

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IPC IPC(8): G02F1/03H04B10/00
Inventor 职亚楠周煜万玲玉闫爱民孙建锋刘立人许楠王利娟
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI