光学学报, 2018, 38 (7): 0714002, 网络出版: 2018-09-05
环境温度变化不敏感的光学腔热屏蔽层设计 下载: 1100次封面文章
Design of Thermal Shield of Optical Cavities for Low Sensitivity to Environmental Temperature Fluctuations
激光光学 激光稳频 光学法布里-珀罗腔 温度响应时间 热辐射 laser optics laser frequency stabilization optical Fabry-Perot cavity response time to temperature fluctuation thermal radiation
摘要
通过将光学腔与外围热屏蔽层之间的热传递模型等效为多级电阻电容(RC)积分电路,计算得到光学腔的温度对外界环境温度变化的响应特性。用此方法探讨了当热屏蔽层的质量被限定时,热屏蔽层与光学腔的距离、热屏蔽层的层数和厚度对光学腔的温度响应特性的影响。分析结果表明,热屏蔽层与光学腔的距离从40 mm减小至5 mm,可使光学腔的温度响应时间增加1倍;当热屏蔽层的层数从1层增加至3层,且增加光学腔的最内层热屏蔽层的厚度,可使光学腔的温度对快速的环境温度变化的敏感度减小1个数量级以上。通过优化后的光学腔的热屏蔽层设计,有望提高锁定于光学腔的稳频激光的频率稳定度。
Abstract
Heat transfer from outer thermal shield to an optical cavity is simplified to a multilevel resistor-capacitor (RC) integrating circuit, which is used to calculate the temperature response of the optical cavity to environmental temperature fluctuations. The temperature response of the optical cavity to the distance between the thermal shield and the optical cavity, the number and the thicknesses of the layers of the thermal shield is discussed based on this method when the mass of thermal shield is fixed. The analysis shows that the temperature response time of the optical cavity can be increased by 2 times as the distance between the thermal shield and the optical cavity is reduced from 40 mm to 5 mm. The temperature sensitivity of the optical cavity to the environmental temperature fluctuations can be reduced by at least one order of magnitude when the number of the layers of the thermal shield is increased from 1 to 3 and the thickness of the inner layer of the thermal shield is maximized. The frequency stability of the frequency-stabilized lasers based on the optical cavity can be improved by the optimized design of the thermal shield of an optical cavity.
李雪艳, 蒋燕义, 姚远, 毕志毅, 马龙生. 环境温度变化不敏感的光学腔热屏蔽层设计[J]. 光学学报, 2018, 38(7): 0714002. Xueyan Li, Yanyi Jiang, Yuan Yao, Zhiyi Bi, Longsheng Ma. Design of Thermal Shield of Optical Cavities for Low Sensitivity to Environmental Temperature Fluctuations[J]. Acta Optica Sinica, 2018, 38(7): 0714002.