中国激光, 2014, 41 (9): 0902011, 网络出版: 2014-06-30
全反射棱镜式激光陀螺双纵模稳频技术
Frequency Stabilization Technique of Total Reflection Prism Laser Gyros with Double Longitudinal Modes
激光光学 棱镜式激光陀螺 双纵模 稳频精度 功率调谐曲线 laser optics prism laser gyros double longitudinal mode frequency stabilization accuracy power tuning curve
摘要
针对全反射棱镜式激光陀螺在单纵模稳频条件下纵模调制信号存在盲区的现象,研究了全反射棱镜式激光陀螺双纵模稳频技术。理论分析了功率调谐曲线的特征,获得了双纵模条件下小抖动调制信号的幅度及相位特性,提出了双纵模稳频控制方案,通过软硬件电路设计,搭建了全反射棱镜式激光陀螺双纵模稳频控制系统。在定温和变温环境下,分别对单纵模稳频与双纵模稳频进行了实验测试。实验结果表明,与单纵模稳频控制方法相比,双纵模稳频技术在稳频精度上提高了60%,陀螺精度也得到了相应的提高。
Abstract
For the dead zones phenomenon of longitudinal modes modulating signal in the total reflection prism laser gyros (TRPLG) during in single longitudinal mode frequency stabilization, a novel technique for the double longitudinal mode frequency stabilization of the TRPLG is studied. By analysing the theory of power tuning curve, amplitude and phase characteristics of the small jitter modulation signal in double longitudinal mode are derived. The double longitudinal mode frequency stabilization scheme is proposed, and the control system for the double longitudinal mode frequency stabilization of the TRPLG is built by software and hardware circuit design. In the fixed and varied temperature environments, the experimental tests for the single longitudinal mode and double longitudinal mode frequency stabilization are conducted. The results show that, comparing with the control method for single longitudinal mode frequency stabilization, the frequency stabilization accuracy of the double longitudinal mode can be improved by over 60%, and the accuracy of gyros is also increased accordingly.
马家君, 蒋军彪, 刘健宁. 全反射棱镜式激光陀螺双纵模稳频技术[J]. 中国激光, 2014, 41(9): 0902011. Ma Jiajun, Jiang Junbiao, Liu Jianning. Frequency Stabilization Technique of Total Reflection Prism Laser Gyros with Double Longitudinal Modes[J]. Chinese Journal of Lasers, 2014, 41(9): 0902011.