基于温度和PZT协同控制的激光器频率锁定技术研究  

Research on laser frequency locking technology based on temperature and PZT control

作　　者：雷明 于怀勇 方圆 向强 杨怿 张丽哲 Lei Ming;Yu Huaiyong;Fang Yuan;Xiang Qiang;Yang Yi;Zhang Lizhe(State Key Laboratory of Inertial Technology,Beijing Institute of Automatic Control Equipment,Beijing 100074,China)

机构地区：[1]北京自动化控制设备研究所惯性技术国家重点实验室,北京100074

出　　处：《光电工程》2020年第9期55-61,共7页Opto-Electronic Engineering

基　　金：“十三五”装备预先研究课题。

摘　　要：本文针对谐振式光纤陀螺应用需求,提出一种基于激光器温度和PZT协同控制的频率跟踪锁定控制方案,综合利用激光器温度调谐所具有的大范围、PZT电压调谐的高精度高动态技术优势,实现光纤激光器中心频率对谐振腔谐振频率的跟踪锁定。进行了透射式谐振信号的数学仿真,对温度和PZT协同控制方案进行了硬件设计和算法仿真,重点分析了频率跟踪锁定方案中控制参数对锁定稳定性的影响情况。完成了激光器频率锁定系统的研制,实现了激光器中心频率对谐振腔谐振频率的高精度、长时间跟踪锁定,常温条件下1h频率跟踪锁定精度为4.8×10^-9,变温条件下5.5 h频率跟踪锁定精度低至9.74×10^-8。上述研究工作为谐振式光纤陀螺长期性能提升奠定了重要的技术基础。Aiming at the application requirement of resonator fiber optic gyroscopes,a frequency tracking and locking control scheme based on laser temperature and PZT control is proposed in this paper.By taking advantages of the large range of laser temperature tuning as well as the high precision and high dynamicity of PZT tuning,tracking of the fiber laser’s central frequency to the fiber ring resonator’s resonance frequency is realized.Typical transmission resonant curve is simulated by mathematical methods.Hardware design,algorithm simulations of temperature and PZT control scheme are carried out.The influence of control parameters on tracking stability is analyzed.The development of laser frequency tracking systems is assembled.The high-precision and long-time tracking of laser’s central frequency to resonance frequency is realized successfully.The locking precision is low to 4.8×10^-9 over one hour under room temperature.The locking precision is low to 9.74×10^-8 over 5.5 hours under variable temperature.This work has laid an important foundation for improving the long-term performance of resonator fiber optic gyroscopes.

关 键 词：谐振式光纤陀螺 频率锁定 温度调谐 PZT控制 

分 类 号：TN253[电子电信—物理电子学] V241.5[航空宇航科学与技术—飞行器设计]