Chinese Optics Letters, Volume. 20, Issue 1, 011203(2022)
Analysis and suppression of thermal effect of an ultra-stable laser interferometer for space-based gravitational waves detection
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![Two interference light paths [(a) light route A and (b) light route B] separated from the Michelson interferometer.](/Images/icon/loading.gif){kind=icon}
Fig. 2. Two interference light paths [(a) light route A and (b) light route B] separated from the Michelson interferometer.
Fig. 3. (a) Reflection optical path and (b) transmission optical path in the BS.
Fig. 5. (a) Coefficient of the optical path variation with temperature when the incident angle θs is constant and the thickness Ls is variable. (b) Coefficient of the optical path variation with temperature when the thickness Ls is constant and the incident angle θs is variable.
Fig. 6. Optical path of the heterodyne laser interferometer, which refers to LPF, is designed with a compensator. Laser 1 and Laser 2 are the heterodyne laser sources obtained by acousto-optical modulators (AOMs).
Fig. 7. Relationship of the temperature and optical coupling coefficient and the incident angle of the compensator. The black line is the result of the theoretical model, and the red dots are the results of the COMSOL simulation.
Table 1. The Parameters of Fused Silica Lens in the Interferometer
View tableView in ArticleTable 1. The Parameters of Fused Silica Lens in the Interferometer
Parameters Value Thermal expansion coefficient 0.57 ppm/K Refractive index variation with temperature dn/dT 12.8 ppm/K Thickness of lens L 7 mm
Table 2. The Incident Angle of Each Lens of the OBI
View tableView in ArticleTable 2. The Incident Angle of Each Lens of the OBI
Lens No. (in Fig. 6 )Incident Angle 2, 3, 4, 5, 6, 7, 8 45° 1 55° 9 35° Compensator 45° (initial)
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Guanfang Wang, Zhu Li, Jialing Huang, Huizong Duan, Xiangqing Huang, Hongfan Liu, Qi Liu, Shanqing Yang, Liangcheng Tu, Hsien-Chi Yeh, "Analysis and suppression of thermal effect of an ultra-stable laser interferometer for space-based gravitational waves detection," Chin. Opt. Lett. 20, 011203 (2022)
Paper Information
Category: Instrumentation, Measurement, and Optical Sensing
Received: Sep. 10, 2021
Accepted: Sep. 30, 2021
Published Online: Oct. 26, 2021
The Author Email: Zhu Li (lizhu@mail.sysu.edu.cn)
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