基于调制转移的大功率半导体激光器频率稳定控制  

Frequency Stability Control of High-power Semiconductor Lasers Based on Modulation Transfer

作　　者：刘兆 LIU Zhao(Jiangxi Qianzhao Photoelectric Co.,Ltd.,Nanchang,China)

机构地区：[1]江西乾照光电有限公司,南昌

出　　处：《光电技术应用》2023年第4期41-45,69,共6页Electro-Optic Technology Application

摘　　要：为了提高大功率半导体激光器输出频率稳定控制的效果,提出基于调制转移的大功率半导体激光器频率稳定控制方法。首先分析大功率半导体激光器工作原理,利用光电调制器对激光器泵浦光相位进行调制,获取大功率半导体激光器光波附加相位和泵浦光电场矢量;然后以附加相位和泵浦光电场矢量为基础,使用调制转移技术建立调制转移光谱锁频环路模型,计算大功率半导体激光器探测光和边带拍频信号;最后建立调制转移光谱锁频环路模型表达式,通过求解该表达式,得到大功率半导体激光器的锁频数值,实现激光器输出频率的有效控制。实验表明,文中方法计算大功率半导体激光器拍频信号较为准确,降低其输出拍频信号区间,响应时间最大为0.07 s,响应较为迅速,控制精度较高,具备较好的频率稳定控制能力,控制效果好。In order to improve the output frequency stability control effect of high-power semiconductor lasers,a frequency stability control method of high-power semiconductor lasers based on modulation transfer is proposed.At first,the working principle of high-power semiconductor laser is analyzed,and the pump phase of the laser is modulated by a photoelectric modulator to obtain the additional phase of the laser wave and the pump electric field vector of the high-power semiconductor laser.And then,based on the additional phase and the pump electric field vector,the modulation transfer spectrum frequency-locked loop model is established using the modulation transfer technology,and the detection light and sideband beat signal of the high-power semiconductor laser are calculated.At last,the model expression of modulation transfer spectrum frequency locking loop is established.By solving the expression,the frequency locking value of high-power semiconductor laser is obtained,and the effective control of laser output frequency is realized.The experiment shows that the method is more accurate in calculating the beat signal of high-power semiconductor laser,and reduces its output beat signal range.The maximum response time is 0.07 s.The response is relatively fast,and the control accuracy is higher.The method has good frequency stability control ability,and the control effect is good.

关 键 词：调制转移 大功率 半导体激光器 频率稳定控制 光电调制器 环路模型 

分 类 号：TN248.4[电子电信—物理电子学]