Enhanced power conversion efficiency in 900-nm range single emitter broad stripe laser diodes maintaining high power operability

Yoshikazu Kaifuchi; Kyohei Yoshida; Yuji Yamagata; Ryozaburo Nogawa; Yumi Yamada; Masayuki Yamaguchi

doi:10.1117/12.2509184

4 March 2019 Enhanced power conversion efficiency in 900-nm range single emitter broad stripe laser diodes maintaining high power operability

Yoshikazu Kaifuchi, Kyohei Yoshida, Yuji Yamagata, Ryozaburo Nogawa, Yumi Yamada, Masayuki Yamaguchi

Author Affiliations +

Proceedings Volume 10900, High-Power Diode Laser Technology XVII; 109000F (2019) https://doi.org/10.1117/12.2509184
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Design optimization of single emitter broad stripe 900-nm laser diodes was experimentally studied to achieve high power conversion efficiency (PCE) for a use in fiber laser systems. We chose two approaches for PCE improvement. The first is an optical confinement factor Γ_well optimization which affects threshold current and internal loss. The second is electric resistance minimization to suppress unwanted power consumption causing heat generation. As a result, the newly designed LD successfully demonstrates the high PCE of 72.5 % at middle power range and 66.7 % at practical high power of 20 W.

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Citation Download Citation

Yoshikazu Kaifuchi, Kyohei Yoshida, Yuji Yamagata, Ryozaburo Nogawa, Yumi Yamada, and Masayuki Yamaguchi "Enhanced power conversion efficiency in 900-nm range single emitter broad stripe laser diodes maintaining high power operability", Proc. SPIE 10900, High-Power Diode Laser Technology XVII, 109000F (4 March 2019); https://doi.org/10.1117/12.2509184

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