Research on AOM-based modulation technology for laser communications

Xu Shanhe; Xiao Shali; Wang Shan; Yi Xing

doi:10.13756/j.gtxyj.2014.05.018

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Research on AOM-based modulation technology for laser communications

- Research on AOM-based modulation technology for laser communications
- Study on Optical communication Issue 5, Pages: 59-62(2014)
- 作者机构：
  
  重庆大学光电技术及系统教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2014.05.018
  CLC： TN929.1
- Published：2014，
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[1]徐山河,肖沙里,王珊,易星.基于声光调制的激光通信调制系统研究[J].光通信研究,2014(05):59-62.

Xu Shanhe, Xiao Shali, Wang Shan, et al. Research on AOM-based modulation technology for laser communications. [J]. (5):59-62(2014)
[1]徐山河,肖沙里,王珊,易星.基于声光调制的激光通信调制系统研究[J].光通信研究,2014(05):59-62. DOI： 10.13756/j.gtxyj.2014.05.018.

Xu Shanhe, Xiao Shali, Wang Shan, et al. Research on AOM-based modulation technology for laser communications. [J]. (5):59-62(2014) DOI： 10.13756/j.gtxyj.2014.05.018.

摘要

通过对激光外调制不同方式的对比分析

重点研究了AOM（声光调制）器件的原理及控制方法

提出了三种可控调制方法

且在控制方面分别进行了对比验证。采用其中的TTL电平（典型值高电平3.5V

低电平0.2V）调控方法

将数字信号经FPGA（现场可编程门阵列）以2FSK（二进制移频键控）方式进行调制编码

调制信号通过AOM加载于激光上

激光通过自由空间传输

借助串口实现了通信速率为115.2kbit/s的数字通信

且该激光外调制通信系统高频载波达到了0.7MHz左右。

Abstract

On basis of comparing and analyzing the different modes of laser external modulation

this paper focuses on the principle and control methods of Acousto-Optic Modulation（AOM）devices.Then it presents three controllable ones and compares and verifies them respectively.It adopts the TTL level（3.5V/0.2V）control method to modulate and encode the digital signals via FPGA by way of 2FSK and load the modulated signals on to laser light by AOM

which realizes 115.2kbit/s digital communication after free space transmission and the carrier of this laser external modulation communication system reaches about 0.7MHz.

关键词

声光调制激光通信现场可编程门阵列移频键控

Keywords

AOMlaser communicationFPGAFSK

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Related Institution

Institute of Space Optoelectronics Technology,Changchun University of Science and Technology

Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China,Chongqing University

Wuhan National Laboratory for Optoelectronics,Huazhong Institute of Optoelectronic Technology

Institute of Space Optoelectronic Technology, Changchun University of Science and Technology

Shanghai Aerospace Electronic Technology Institute

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