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Development of a space-compatible packaging system for an integrated monolithic ultra-stable optical reference
Zhenhai Zhan1, Yingxin Luo1, Hsien-Chi Yeh1
1MOE Key Laboratory of TianQin Mission, TianQin Research Center for Gravitational Physics and School of Physics and Astronomy, Frontiers Science Center for TianQin, Gravitational Wave Research Center of CNSA, Sun Yat-sen University (Zhuhai Campus), Zhuhai 519082, China.
We developed a robust space packaging system for ultra-stable optical references, crucial for satellite geodesy missions. This system ensures high geometric stability and passes rigorous aerospace tests, demonstrating its reliability for space applications.
Area of Science:
- Space Engineering
- Optical Physics
- Geodesy
Background:
- Ultra-stable optical references are vital for high-precision satellite geodesy.
- Previous packaging designs required optimization for space environments.
Purpose of the Study:
- To develop and validate a space-compatible packaging system for an integrated monolithic ultra-stable optical reference.
- To ensure the system's robustness against launch loads and maintain optical cavity stability in orbit.
Main Methods:
- Finite element method (FEM) for optimizing mounting and thermal insulation.
- Comprehensive simulations to assess system robustness and vacuum maintenance.
- Engineering prototype construction and aerospace environmental testing (vibration, thermal cycling).
Main Results:
- Simulations confirmed system robustness against severe launch loads.
- Prototype successfully passed sinusoidal and random vibration tests, and thermal cycling.
- Achieved a thermal time constant exceeding 9.5 × 10^4 s, enabling high temperature stability (1.1 × 10^-6 K/Hz^1/2).
Conclusions:
- The developed packaging system is space-compatible and robust for satellite geodesy missions.
- The design ensures ultra-high geometric cavity length stability and long-term vacuum maintenance.
- The system is also suitable for terrestrial and laboratory applications.
