DPAL activities in Japan

Masamori Endo; Fumio Wani

doi:10.1117/12.2065083

3 February 2015 DPAL activities in Japan

Masamori Endo, Fumio Wani

Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92551S (2015) https://doi.org/10.1117/12.2065083
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

Activities on diode pumped alkali laser (DPAL) in Japan is reviewed. We have started alkali laser works in 2011, and currently, we are the only players in Japan. Our interests are application oriented, and it is not only defense but also industrial. DPAL is a good candidate as a source of remote laser machining, thanks to its scalability and extremely good beam quality. We are studying on scientific and engineering problems of Cs DPAL with a small-scale apparatus. A commercial diode laser with volume Bragg grating outcoupler is used to pump the gain cell longitudinally. A 6.5 W continuous-wave output with optical to optical efficiency of 56% (based on the absorbed power) has been achieved. Numerical simulation codes are developed to understand the physics of DPAL and to help future developments.

Citation Download Citation

Masamori Endo and Fumio Wani "DPAL activities in Japan", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92551S (3 February 2015); https://doi.org/10.1117/12.2065083

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