Meng Fanchao, Ma Chaoqun, Zhang Dingyi, Li Yue, Meng Lingqiang, Xing Chengwen, Jia Jianjun
School of Physics and Optoelectronic Engineering, Key Laboratory of Gravitational Wave Precision Measurement of Zhejiang Province, Taiji Laboratory for Gravitational Wave Universe, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China.
Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics Chinese Academy of Sciences, Shanghai, 200083, China.
Sci Rep. 2025 Jan 7;15(1):1150. doi: 10.1038/s41598-025-85527-9.
In this paper, a fixed support method for a cryogenic monocrystalline silicon Fabry-Pérot cavity of an ultra-stable laser for space applications is proposed. Through finite element analysis, the vibration sensitivity at the center of the cavity is below 10E-12/g; the fundamental frequency is 381 Hz; the thermal deformation is compensated by applying a preload force of about 3 N*m for a variation of 300 K to 124 K. Based on these analyses, an equal-mass cavity simulator was machined and mounted. The mounting process was then explored to keep its support angle mounting error within 40'. Next, the simulator was vibration tested, and the deviation of the cavity after the test was within 10″. Finally, the thermal deformation of the simulator and the support performance of the PEEK cylinders at 77 K was briefly verified. These works provide an alternative solution for future ultra-stable lasers with cryogenic monocrystalline silicon cavities for space applications.
本文提出了一种用于空间应用的超稳定激光器的低温单晶硅法布里-珀罗腔的固定支撑方法。通过有限元分析，腔中心的振动灵敏度低于10E-12/g；基频为381Hz；通过施加约3N·m的预载力来补偿300K至124K变化时的热变形。基于这些分析，加工并安装了一个等质量腔模拟器。然后探索安装过程以将其支撑角安装误差保持在40'以内。接下来，对模拟器进行振动测试，测试后腔的偏差在10″以内。最后，简要验证了模拟器在77K时的热变形和聚醚醚酮圆柱的支撑性能。这些工作为未来用于空间应用的具有低温单晶硅腔的超稳定激光器提供了一种替代解决方案。
