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非球面整形镜在空间激光通信终端中的应用

Aspheric Homogenizer Applying in Space Laser Communication Terminal

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摘要

在同轴两片反射镜光学天线的空间激光通信终端中, 入射高斯光束的中心最高能量部分被次镜及次镜支架遮挡, 导致部分能量损失。为了减小能量损失, 提高系统发射效率, 将非球面整形镜应用在发射端准直扩束系统中, 实现高斯光束到平顶光束的整形, 以减小次镜及次镜支架遮挡损失的能量, 同时对光束进行准直扩束。所设计的非球面整形系统入射面直径d=3 mm, 出射面直径D=12 mm, 波长λ=1550 nm, 玻璃材料为BK7, 输出面上的光强分布接近均匀, 发散角θ=1.216 mrad。对比分析传统球面扩束镜与非球面整形扩束镜可知:同等参数条件下, 采用非球面整形扩束镜的发射端的发射效率提高了11.1%。

Abstract

In space laser communication terminal with coaxial two pieces of reflective mirror of optical antenna, the highest energy part of the incident Gaussian beam can be obscured by the secondary mirror and its bracket, which leads to the loss of energy. In order to reduce loss of energy and improve the transmitting efficiency of terminal, we use an aspheric homogenizer in beam collimation system. The aspheric homogenizer can convert a Gaussian beam to a flattop beam, reduce the loss of energy led by the obscure of the secondary mirror and its bracket and collimate the beam. In the designed aspheric homogenizer system, incidence diameter d is 3 mm, exit diameter D is 12 mm, wavelength λ is 1550 nm, the glass material is BK7, the light intensity distribution is close to uniform on the output surface, and the divergence angle θ is 1.216 mrad. Finally, the spherical beam expander is contrasted with aspheric homogenizer, and the transmitting efficiency of terminal with aspheric homogenizer can be improved by 11.1% under the same condition.

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中图分类号:TN929.1

DOI:10.3788/lop55.100601

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金(61701045)、吉林省优秀青年人才基金(20170520163JH)、长春理工大学创新基金(2016·[03])

收稿日期:2018-03-15

修改稿日期:2018-04-20

网络出版日期:2018-04-25

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宋志化:长春理工大学光电工程学院, 吉林 长春 130022长春理工大学空地激光通信技术国防重点学科实验室, 吉林 长春 130022
江伦:长春理工大学空地激光通信技术国防重点学科实验室, 吉林 长春 130022
曹海帅:长春理工大学光电工程学院, 吉林 长春 130022长春理工大学空地激光通信技术国防重点学科实验室, 吉林 长春 130022
佟首峰:长春理工大学空地激光通信技术国防重点学科实验室, 吉林 长春 130022

联系人作者:宋志化(zhihuamail@foxmail.com)

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引用该论文

Song Zhihua,Jiang Lun,Cao Haishuai,Tong Shoufeng. Aspheric Homogenizer Applying in Space Laser Communication Terminal[J]. Laser & Optoelectronics Progress, 2018, 55(10): 100601

宋志化,江伦,曹海帅,佟首峰. 非球面整形镜在空间激光通信终端中的应用[J]. 激光与光电子学进展, 2018, 55(10): 100601

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