Study on beam collimation and detection efficiency for acousto-optic deflection systems

He Ning; Xie Zhaoling; Guo Qiushi

doi:10.13756/j.gtxyj.2013.05.002

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Study on beam collimation and detection efficiency for acousto-optic deflection systems

- Study on beam collimation and detection efficiency for acousto-optic deflection systems
- Study on Optical communication Issue 5, Pages: 15-18(2013)
- 作者机构：
  
  桂林电子科技大学信息与通信学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2013.05.002
  CLC： TB57
- Published：2013，
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[1]何宁,谢朝玲,郭求实.声光偏转系统光束准直及探测效率研究[J].光通信研究,2013(05):15-18.

He Ning, Xie Zhaoling, Guo Qiushi. Study on beam collimation and detection efficiency for acousto-optic deflection systems. [J]. (5):15-18(2013)
[1]何宁,谢朝玲,郭求实.声光偏转系统光束准直及探测效率研究[J].光通信研究,2013(05):15-18. DOI： 10.13756/j.gtxyj.2013.05.002.

He Ning, Xie Zhaoling, Guo Qiushi. Study on beam collimation and detection efficiency for acousto-optic deflection systems. [J]. (5):15-18(2013) DOI： 10.13756/j.gtxyj.2013.05.002.

摘要

针对声光偏转效应相干探测信号光斑随射频信号变化的偏移特性

利用光斑重叠物理模型

研究了光斑结构与探测效率的关系

分析了光束准直、探测器有效光敏面半径以及本振光能量匹配等因素对相干光探测效率的影响。计算机仿真和实验测试验证表明

以能量分布均匀的光斑作为本振光斑

对信号光斑在一定范围内漂移的光斑重叠相干探测效率改善十分有利

空间失配角在±0.5rad内

重叠效率下降不到5%;采用光斑压缩准直处理能有效保证系统混频光束准直性

并且重叠光斑能量利用率高

系统光学匹配好。

Abstract

As signal light spots in the coherent optical detection system change with RF signals because of acousto-optic deflection effects

we study the relationship between the spot structure and the detecting efficiency on the basis of a spot overlapping physical model

analyze the effects of beam collimation

active photosensitive surface radius of detectors and optical local oscillator energy matching on the coherent detection efficiency.The computer simulation and experimental tests demonstrate that taking spots with uniformly distributed energy as local oscillator spots is conducive to improving the efficiency of the coherent detection of the overlapping spots when they drift within a certain range

e.g.when the spatial mismatching angle is in the range±0.5rad

the overlapping efficiency declines by less than 5%

and that the system beam collimation is effectively ensured by light spot compression and collimation processing

the energy utilization ratio of overlapping spots is higher and the system optical matching is better.

关键词

声光偏转相干探测光束准直光斑重叠探测效率

Keywords

acousto-optic deflectioncoherent detectionbeam collimationlight spot overlappingdetection efficiency

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