液晶可变缓速器在原子陀螺仪激光功率稳定系统中对环境温度漂移的抑制。

Yue Niu, Lihong Duan, Jingxin Zhang, Jiong Huang, Yueyang Zhai, W. Quan
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引用次数: 1

摘要

液晶可变缓速器激光功率稳定系统具有低功耗、易于集成等优点,已广泛应用于小型化原子陀螺仪中。然而,系统输出功率随环境温度的长期漂移会显著降低原子陀螺仪的长期性能。在这里,我们展示了一种基于光功率漂移和环境温度建模相结合的动态闭环控制方法。在23.7 ~ 25.3℃的环境温度变化范围内连续工作45 min,平均100 s后,输出光功率的相对艾伦偏差从2.29 × 10-4减小到3.35 × 10-5,减小了一个数量级。系统的长期稳定性显著提高。此外,该方案不需要额外的热控制装置,防止引入额外的电磁干扰,这是小型化原子陀螺仪所需要的。
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Suppression of ambient temperature-caused drift in a laser power stabilization system with a liquid crystal variable retarder in atomic gyroscopes.
Laser power stabilization systems with liquid crystal variable retarders have been employed in miniaturized atomic gyroscopes for the merits of low power consumption and easy integration. However, the long-term power drift of the system output with ambient temperature significantly decreases the long-term performance of atomic gyroscopes. Here, we demonstrated a method of dynamic closed-loop control based on the combination of optical power drift and ambient temperature modeling. For a continuous 45 min operation within an ambient temperature variation range of 23.7-25.3 °C, the relative Allan deviation of the output optical power was decreased by one order of magnitude from 2.29 × 10-4 to 3.35 × 10-5 after 100 s averaging time. The long-term stability of the system was significantly improved. In addition, the scheme requires no additional thermal control device, preventing the introduction of extra electromagnetic interference, which is desirable in a miniaturized atomic gyroscope.
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