双闭环兰姆凹陷激光稳频方法

兰姆凹陷稳频激光器环境适应能力较差、在环境温度变化时容易失锁的问题,主要是由于环境温度波动导致的激光器腔长变化超出了压电陶瓷的调整范围。本文提出将兰姆凹陷稳频技术与热稳频技术相结合的方法,利用附加的温度控制系统补偿环境变化造成的激光器管壁温度变化,使工作过程中激光器腔长基本保持稳定,从而保证激光器谐振腔长变化不超出压电陶瓷的补偿范围。试验表明,所用方法解决了兰姆凹陷稳频激光器容易失锁的问题,提高了激光器的环境温度适应性,为兰姆凹陷稳频技术在工业现场的应用创造了条件。

Double Closed-loop Lamb Dip Stabilized Laser

Lamb dip stabilized He-Ne Laser has less？ environmental suitability because of the travel limit of piezoelectric ceramics. This weakness restricts the use of Lamb dip steady frequency technology in industrial field. Based on the analysis of control process, we found that the length change of the resonant cavity is the result of the fluctuant environment temperature as the main reason of the failed control. An external temperature control loop was applied in the control system to counteract the negative influence of the environment temperature. This technology combined Lamb dip stabilization method and thermal frequency stabilization method, and made it possible for Lamb dip stabilized He-Ne Laser to be used widely in industrial field.