3 February 2015 420nm alkali blue laser based on two-photon absorption
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Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92552R (2015) https://doi.org/10.1117/12.2065373
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China
Based on two-photon absorption, a 420nm blue laser of alkali Rb vapor was demonstrated, and a dye laser was used as the pumping laser. Utilizing the energy level structure of Rb atom, lasering mechanism and two-photon absorption process are analyzed. Absorbing two 778.1nm photons, Rb atoms were excited from 52 S1/2 to 52 D5/2, then relaxed to 62 P3/2 with mid infrared photon radiation. 420nm blue laser was achieved by the transition 62 P3/2→52 S1/2. To improve efficiency of the blue laser, two-photon resonant excitation pumped alkali vapor blue lasers are proposed, which will be good beam quality, high efficiency and scalable blue lasers. The development of diode pumped alkali vapor blue laser is expected.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yan-nan Tan, Yan-nan Tan, Yi-min Li, Yi-min Li, Tong Liu, Tong Liu, Fa-quan Gong, Fa-quan Gong, Chun-yan Jia, Chun-yan Jia, Shu Hu, Shu Hu, Bao-dong Gai, Bao-dong Gai, Jing-wei Guo, Jing-wei Guo, Wan-fa Liu, Wan-fa Liu, "420nm alkali blue laser based on two-photon absorption", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92552R (3 February 2015); doi: 10.1117/12.2065373; https://doi.org/10.1117/12.2065373

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