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微弧度量级远场发散角光束发射系统的设计与实现

Design and Development of Beam Transmitting System with Far-Field Beam Divergence Angle of Micro-Radian Dimension

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摘要

建立了发射光束通过带有波像差的望远镜系统后的远场光斑分布数学模型,采用数值计算,结合Monte Carlo方法分析了波像差方均根(RMS)值对发射光束远场发散角的影响,据此确定望远镜波像差的容差,以实现特定发射光束的远场发散角。结果表明:对于采用偏轴发射方案的激光通信系统,当望远镜的波像差RMS值优于0.13λ(λ为光束的波长)时,发射光束远场发散角小于10 μrad,当RMS值小于0.2λ时,发射光束远场发散角小于16.2 μrad,且仍有60%的概率小于10 μrad。在实验室中,不同温度下望远镜波像差及其对应的发射光束远场发散角的测试结果很好地验证了以上分析结果。

Abstract

A mathematical model of the far-field beam distribution is built after the transmitted beam passes through the telescope with wave-front error. The effect of root mean square (RMS) value of wave-front error on the divergence angle of the transmitted beam is analyzed by numerical calculation combined with Monte Carlo method. Based on this, the tolerance of the telescope wave-front error required by the far-field divergence angle of the transmitted beam is determined. The analysis results show that for the laser communication system which the transmitted beam is off-axis on the telescope pupil, the far-field divergence angle is smaller than 10 μrad when the RMS of wave-front error is smaller than 0.13λ(λ is the light wavelength). The far-field divergence angle is smaller than 16.2 μrad when the RMS is smaller than 0.2λ and the probability of the divergence angle smaller than 10 μrad is 60%. The testing results of the wave-front errors of the telescope at different temperatures and the corresponding far-field divergence angles of the transmitted beams are well coincided with the analysis results.

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中图分类号:O436

DOI:10.3788/cjl201845.0605004

所属栏目:光束传输与控制

基金项目:国家自然科学基金(61302181)

收稿日期:2017-12-08

修改稿日期:2018-01-24

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作者单位    点击查看

况耀武:中国科学院上海技术物理研究所中国科学院空间主动光电技术重点实验室, 上海 200083中国科学院大学, 北京 100049
何志平:中国科学院上海技术物理研究所中国科学院空间主动光电技术重点实验室, 上海 200083
袁立银:中国科学院上海技术物理研究所中国科学院空间主动光电技术重点实验室, 上海 200083
张亮:中国科学院上海技术物理研究所中国科学院空间主动光电技术重点实验室, 上海 200083
舒嵘:中国科学院上海技术物理研究所中国科学院空间主动光电技术重点实验室, 上海 200083

联系人作者:舒嵘(shurong@mail.sitp.ac.cn)

备注:况耀武(1986—),男,硕士,助理研究员,主要从事光学系统设计仿真方面的研究。E-mail: kyw0104@163.com

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引用该论文

Kuang Yaowu,He Zhiping,Yuan Liyin,Zhang Liang,Shu Rong. Design and Development of Beam Transmitting System with Far-Field Beam Divergence Angle of Micro-Radian Dimension[J]. Chinese Journal of Lasers, 2018, 45(6): 0605004

况耀武,何志平,袁立银,张亮,舒嵘. 微弧度量级远场发散角光束发射系统的设计与实现[J]. 中国激光, 2018, 45(6): 0605004

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