光栅外腔反馈半导体激光器及稳频系统的动态特性测试  

Dynamic Response of the Grating-Feedback External Cavity Diode Laser and Frequency Stabilization System

作　　者：秦利娟 秦林 王彦华[1,2] 王军民[2,3] 

机构地区：[1]山西大学物理电子工程学院,山西太原030006 [2]量子光学与光量子器件国家重点实验室山西大学光电研究所,山西太原030006 [3]山西大学极端光学协同创新中心,山西太原030006

出　　处：《山西大学学报（自然科学版）》2017年第4期789-796,共8页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(11374198);国家自然科学基金委国家重大科研仪器设备研制专项(61227902)

摘　　要：能够在复杂的使用环境中保持输出激光频率稳定一直都是激光器研究的重要内容。人们不仅需要直接优化系统结构,还应对系统特性进行针对性地校正和优化。文章构建了一套高效、高分辨率测量激光频率变化的实验系统,通过研究激光器被调制后的输出频率变化,可获得在实验室环境中ECDL激光器及其稳频系统的动态响应。实验中记录了正弦点频和方波两种信号调制后激光频率的响应,在进行FFT分析后获得了幅频特性和相频特性。结果表明方波调制信号测量方案同正弦点频测量方案结果一致,而且不需要多次测量,测量效率高。利用该测量系统还可以获得机械冲击后激光器的幅频特性,可用于分析闭环系统的冲击响应特征,从而为类似环境中闭环系统参数校正和优化提供实验依据。Frequency stability is one of the key issues when the diode laser work in the harsh environment. The mechanical structure design of the laser should to be optimized. The corresponding calibration based for the environmental system characteristics is more crucial. So, in order to obtain the dynamic response of the ECDL laser and its frequency stabilization system, an efficient and precise method to measure laser frequency fluctuation is demonstrated. After recording the.system response to sinusoidal and square wave modulation, the amplitude frequency and the phase frequency characters are obtained by Fast Fourier Transform. The results show that the measurement scheme of the square wave modulating signal is consistent with sinusoidal wave modulating signal, it is more effective and does not need multiple measurements. Using the dynamic analysis system, the response of closed-loop system to mechanical shock is achieved. It can provide the experimental basis for the calibration and optimization of the system parameters in the similar environment.

关 键 词：动态响应 频率响应特性 ECDL激光器 激光器稳频 

分 类 号：O437[机械工程—光学工程]