非球面整形镜在空间激光通信终端中的应用

宋志化; 江伦; 曹海帅; 佟首峰

doi:doi:10.3788/lop55.100601

激光与光电子学进展, 2018, 55 (10): 100601, 网络出版: 2018-10-14

非球面整形镜在空间激光通信终端中的应用下载： 625次

Aspheric Homogenizer Applying in Space Laser Communication Terminal

论文大纲

宋志化 ^1,2,*江伦 ²曹海帅 ^1,2佟首峰 ²

作者单位

¹ 长春理工大学光电工程学院, 吉林长春 130022

² 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

光通信空间激光通信非球面光束整形扩束准直 optical communications space laser communication aspheric surface beam shaping beam collimation

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

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