Generally, resonant optical gyroscopes (ROG) based on the Sagnac effect are very sensitive to the changes of temperature and optical power, which directly affects the output of the gyroscope. To improve the frequency lock-in accuracy and thermal stability of ROG system, the technology of laser frequency combination tuning and locking is proposed and experimentally demonstrated. Using the characteristics of voltage and temperature tuning wavelength of semiconductor laser, the output frequency range of laser is increased, the temperature control system of the resonant cavity can be removed and the gyro can never be unlocked in theory. In addition, the frequency lock-in accuracy under light power fluctuation is improved. Using this technique, a long-term (1-h) bias stability of 24.7 °/h is observed. Moreover, the weight and volume of the ROG are greatly reduced.

中文翻译：

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谐振光学陀螺中的激光频率组合调谐锁定技术

通常，基于萨格纳克效应的谐振光学陀螺仪（ROG）对温度和光功率的变化非常敏感，直接影响陀螺仪的输出。为提高ROG系统的频率锁定精度和热稳定性，提出了激光频率组合调谐锁定技术并进行了实验验证。利用半导体激光器的电压和温度调谐波长的特性，增加了激光器的输出频率范围，可以去掉谐振腔的温控系统，陀螺在理论上永远无法解锁。此外，提高了光功率波动下的锁频精度。使用这种技术，可以观察到 24.7 °/h 的长期 (1-h) 偏置稳定性。而且，