基于TA注入电流调制的激光功率稳定控制技术  

Laser Power Stabilization Control Based on Injection Current Modulation of Tapered Amplifier

作　　者：亓金钰 范文峰[1,2] 段利红 QI Jinyu;FAN Wenfeng;DUAN Lihong(Institute of Large Scientific Devices/Zero Magnetic Science Center,Beihang University,Beijing 100191;Hangzhou Institute of Extremely-Weak Magnetic Field Major National Science and Technology Infrastructure,Hangzhou 310051)

机构地区：[1]北京航空航天大学大科学装置研究院/零磁科学中心,北京100191 [2]杭州极弱磁场国家重大科技基础设施研究院,杭州310051

出　　处：《飞控与探测》2024年第6期66-74,共9页Flight Control & Detection

基　　金：国家杰出青年科学基金项目(61925301);国家自然科学基金青年科学基金项目(62103026)。

摘　　要：针对原子自旋惯性测量系统中大功率抽运激光功率稳定控制存在功率偏振耦合而控制精度难以提升的问题,设计了基于锥形放大器(Tapered Amplifier,TA)注入电流调制的激光功率稳定控制方案,通过直接调节抽运TA注入电流,对大功率激光功率进行稳定控制。实验结果表明,相比于加入稳功率前的抽运激光功率,趋势项漂移得到明显抑制,十秒Allan标准差降低大约75%,该方法可以抑制偏振功率耦合分光误差,实现激光功率与频率的解耦控制,有效提升激光功率稳定性。Aiming at the problem that the power stability control of high-power pumped laser in atomic spin inertial measurement system has power-polarization coupling and the control accuracy is difficult to improve,A laser power stabilization control scheme based on Tapered Amplifier(TA)was designed by directly adjusting the pumping TA injection current,the high power laser power was stably controlled.The result demonstrates that compared with the pumped laser power before adding stable power,the trend term drift is significantly suppressed,and the 10-second Allen standard deviation is reduced by about 75%.This method can suppress the polarization power coupling spectral error,realize the decoupling control of laser power and frequency,and effectively improve the stability of laser power.

关 键 词：原子自旋 激光功率控制 锥形放大器 注入电流 电流调制 

分 类 号：TN248.4[电子电信—物理电子学]