基于声光调制的线性扫频激光器  

Linear Frequency Scanning Laser Based on Acousto-Optic Modulation

作　　者：李宏博 谭中伟[1] 孔梦龙 高洪培 Li Hongbo;Tan Zhongwei;Kong Menglong;Gao Hongpei(Key Laboratory of All Optical Network and Advanced Telecom m unication Network,Ministry of Education,Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室

出　　处：《中国激光》2019年第12期40-47,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(61875008)

摘　　要：针对线性扫频激光器在扫频速度、步长、范围、精度和信噪比等方面差异较大的问题,提出一种基于声光调制直接生成频率扫描激光器的方案。该激光器采用环形腔体结构,具有扫频速度快、扫频精度高、信噪比好等特点。通过分析激光器的信噪比和掺铒光纤放大器中掺铒光纤的长度等参数对生成的频率扫描激光器性能的影响,对现有的频率扫描激光器进行了优化。Aiming at the differences in sweep speed, step size, range, accuracy, and signal-to-noise ratio(SNR) of linear sweep lasers, this study proposes a scheme for directly generating an acousto-optic modulation-based frequency-scanning laser. It adopts a ring-shaped cavity structure, which has the characteristics of fast sweeping speed, high frequency sweeping precision, and high SNR. The existing frequency-scanning laser is optimized by analyzing the effects of the laser′s SNR and length of the erbium-doped fiber in the erbium-doped fiber amplifier on the performance of the generated frequency-scanning laser.

关 键 词：激光器 声光调制 环形腔体结构 掺铒光纤 

分 类 号：TN243[电子电信—物理电子学]