Laser & Optoelectronics Progress, Volume. 59, Issue 7, 0714003(2022)
Design of Fabry-Pérot Cavity with Low Vibration Sensitivity
Aluminum ion optical clock transition has a natural linewidth of 8 mHz. The detection laser's linewidth must be ~1 Hz to obtain the optical clock transition spectral line. The semiconductor laser has a linewidth of 500 kHz and a long-term drift of 90 MHz/h. The laser frequency is locked on the Fabry-Pérot (F-P) cavity to meet the requirements of aluminum ion spectral detection. One of the main noises of the F-P cavity is vibration noise. To reduce the vibration sensitivity of the F-P cavity, this study theoretically analyzes the vibration sensitivity of the F-P cavity with stable laser frequency. The finite element method is used to investigate the relationships between the elastic deformation of the F-P cavity as well as its shape and support position. An F-P cavity is designed with a laser vibration sensitivity of 0.53 kHz/(m·s2) at a laser wavelength of 534 nm. It provides a theoretical foundation for realizing low vibration noise lasers and has important applications in the fields of atomic clocks and precise spectrum measurement.
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Junjuan Shang, Xianwei Zhu, Hao Zhang, Yanyan Zhang, Peilin Zhou, Jiandong Hu, Mengjiao Zhang. Design of Fabry-Pérot Cavity with Low Vibration Sensitivity[J]. Laser & Optoelectronics Progress, 2022, 59(7): 0714003
Category: Lasers and Laser Optics
Received: May. 25, 2021
Accepted: Jun. 19, 2021
Published Online: Mar. 8, 2022
The Author Email: Zhang Mengjiao (zhangmengjiao@henau.edu.cn)