Optically end-pumped rubidium-vapor laser with 693 W output peak-power

Liu Xuchao; Cheng Hongling; Wang Zhimin; Peng Qinjun; Xu Zuyan

doi:10.3788/IRLA20200114

A rubidium-vapor laser pumped by a pulsed titanium sapphire laser was presented to investigate the dynamics of diode-pumped rubidium-vapor lasers. The vapor cell was filled with 70 kPa methane and 6 atm He at room temperature. The laser generated an average power of 208 mW, according to the conversion efficiency of 19% from absorbed 779.8 nm pump light to 795 nm laser. High peak power of 693 W rubidium-vapor laser was achieved with a 100 ns (FWHM) pulse width at a repetition rate of 3 kHz. Our experiments illustrate that the reabsorption of the Rb-He-CH₄ mixtures will be a significant limitation in DPALs with the high pump power intensity. It can be deduced that the pump power intensity threshold of the Rb-He-CH₄ system (6 atm He, 70 kPa CH₄ at room temperature) at 418 K should be >200.6 kW/cm² if LDs with a linewidth of 0.9 nm are adopted as the pump source.

Optically end-pumped rubidium-vapor laser with 693 W output peak-power

1. Key Laboratory of Solid-state Laser, Chinese Academy of Sciences, Beijing 100190, China;

2. Information Optoelectronics Research Institute, Harbin Institute of Technology at Weihai, Weihai 264209, China;

3. University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2020-04-11

Rev Recd Date: 2020-05-21

Publish Date: 2020-09-22

Key words:

Abstract: A rubidium-vapor laser pumped by a pulsed titanium sapphire laser was presented to investigate the dynamics of diode-pumped rubidium-vapor lasers. The vapor cell was filled with 70 kPa methane and 6 atm He at room temperature. The laser generated an average power of 208 mW, according to the conversion efficiency of 19% from absorbed 779.8 nm pump light to 795 nm laser. High peak power of 693 W rubidium-vapor laser was achieved with a 100 ns (FWHM) pulse width at a repetition rate of 3 kHz. Our experiments illustrate that the reabsorption of the Rb-He-CH₄ mixtures will be a significant limitation in DPALs with the high pump power intensity. It can be deduced that the pump power intensity threshold of the Rb-He-CH₄ system (6 atm He, 70 kPa CH₄ at room temperature) at 418 K should be >200.6 kW/cm² if LDs with a linewidth of 0.9 nm are adopted as the pump source.

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Optically end-pumped rubidium-vapor laser with 693 W output peak-power

doi: 10.3788/IRLA20200114

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