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09 February 2025
 
  » arxiv » 2301.01614

 Article overview



A Voigt laser operating on $^{87}$Rb 780 nm transition
Zijie Liu ; Xiaolei Guan ; Xiaomin Qin ; Zhiyang Wang ; Hangbo Shi ; Jia Zhang ; Jianxiang Miao ; Tiantian Shi ; Anhong Dang ; Jingbiao Chen ;
Date 4 Jan 2023
AbstractWe report the development of laser systems -- a "Voigt laser" -- using a Voigt anomalous dispersion optical filter as the frequency-selective element, working at the wavelength of 780 nm of $^{87}$Rb-D2 resonance line. Compared with Faraday anomalous dispersion optical filter, the Voigt anomalous dispersion optical filter can generate a stronger and more uniform magnetic field with a compact size of magnet, and obtains a transmission spectrum with narrower linewidth and more stable lineprofile. In this case, the frequency stability of the Voigt laser reaches 5$ imes$10$^{-9}$ at the averaging time of 200 s, and the wavelength fluctuation of 8-hours free operation is $pm$0.1 pm. Besides, the Voigt laser has greater immunity to diode current than the Faraday laser, with a wavelength fluctuation of $pm$0.5 pm in the current range from 73 mA to 150 mA. Finally, the Voigt laser frequency can be controlled by the cell temperature of the Voigt optical filter, which is expected to achieve a frequency detuning of 20 GHz. Consequently, the Voigt laser, whose frequency could correspond to the atomic transition frequency by tuning the cell temperature, obtains good robustness to the current and temperature fluctuation of laser diode, and could realize a compact optical standard for precise measurement once stabilized by modulation transfer spectroscopy.
Source arXiv, 2301.01614
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