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针对星载积分路径差分吸收(IPDA)激光雷达的应用需求,研制了一套利用空芯光子晶体光纤(HC-PCF)作为吸收池,以CO2气体1.57μm处的吸收线作为频率参考,基于频率调制光谱稳频技术的激光稳频系统。结合其工作原理,建立仿真模型,计算了CO2气压、光谱调制频率以及调制深度对稳频误差信号的影响,给出最优化的设计参数。并且与实验测试数据进行了比对,实验数据与计算结果吻合。报道了系统的稳频效果,给出进一步提升稳频性能的方案意见。
A set of HC-PCF optical fiber (HC-PCF) as absorption cell was developed for the application of spaceborne differential path differential absorption (IPDA) laser radar. The absorption line at 1.57μm CO2 gas was taken as the frequency reference, Modulation spectral stabilized frequency laser stabilization system. Combined with its working principle, a simulation model is established, and the influence of CO2 pressure, spectral modulation frequency and modulation depth on frequency stabilization error signal is calculated, and the optimal design parameters are given. And compared with the experimental test data, the experimental data and calculated results are consistent. Reported the frequency stabilization effect of the system, given the solution to further enhance the stability of the program.