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

Paper Details

Date Published: 4 March 2019
PDF: 6 pages
Proc. SPIE 10900, High-Power Diode Laser Technology XVII, 109000F (4 March 2019); doi: 10.1117/12.2509184
Show Author Affiliations
Yoshikazu Kaifuchi, Fujikura Ltd. (Japan)
Kyohei Yoshida, Fujikura Ltd. (Japan)
Yuji Yamagata, Fujikura Ltd. (Japan)
Ryozaburo Nogawa, Fujikura Ltd. (Japan)
Yumi Yamada, OPTOENERGY Inc. (Japan)
Masayuki Yamaguchi, Fujikura Ltd. (Japan)

Published in SPIE Proceedings Vol. 10900:
High-Power Diode Laser Technology XVII
Mark S. Zediker, Editor(s)

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