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Proceedings Paper

Quasi-CW performance and reliability of dual laser bars on a micro-channel cooler
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Paper Abstract

High power density as the critical performance of laser diode pumps significantly affects both efficiency and power of a solid state laser. In this report, we designed a new packaging structure that two laser bars bonded on the top and bottom of a MCC, respectively, to achieve higher power density at the same bias current or the same power density at a reduced bias current with respective to one laser bar on a MCC. We achieve 1KW output power at a lower bias current 450A with 2.3W/A slope efficiency from a dual-bar MCC at a duty cycle of 8% (200 μs/400 Hz). Other performances like spectral width broadening, wavelength shift and reliability about 1KW quasi-CW high power laser diodes and 5KW for one vertical stack with five dual-bar micro-channel coolers (MCCs) also are discussed. The reliability of dual-bar MCC packaging structure is also studied by life-time testing, and the output peak power of all devices degraded less than 5% after working for 1353 hours.

Paper Details

Date Published: 5 November 2018
PDF: 9 pages
Proc. SPIE 10811, High-Power Lasers and Applications IX, 108110F (5 November 2018); doi: 10.1117/12.2327073
Show Author Affiliations
Hongyou Zhang, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Li Chen, Focuslight Technologies, Inc. (China)
Sen Zhao, Focuslight Technologies, Inc. (China)
Boxue Wang, Focuslight Technologies, Inc. (China)
Chung-en Zah, Focuslight Technologies, Inc. (China)
Xingsheng Liu, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Focuslight Technologies, Inc. (China)

Published in SPIE Proceedings Vol. 10811:
High-Power Lasers and Applications IX
Ruxin Li; Upendra N. Singh, Editor(s)

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