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High power vertical stacked and horizontal arrayed diode laser bar development based on insulation micro-channel cooling (IMCC) and hard solder bonding technology
Author(s): Boxue Wang; Yangtao Jia; Haoyu Zhang; Shiyin Jia; Jindou Liu; Weifeng Wang; Xingsheng Liu
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Paper Abstract

An insulation micro-channel cooling (IMCC) has been developed for packaging high power bar-based vertical stack and horizontal array diode lasers, which eliminates many issues caused in its congener packaged by commercial copper formed micro-channel cooler(MCC), such as coefficient of thermal expansion (CTE) mismatch between cooler and diode laser bar, high coolant quality requirement (DI water) and channel corrosion and electro-corrosion induced by DI water if the DI-water quality is not well maintained The IMCC cooler separates water flow route and electrical route, which allows tap-water as coolant without electro-corrosion and therefore prolongs cooler lifetime dramatically and escalated the reliability of these diode lasers. The thickness of ceramic and copper in an IMCC cooler is well designed to minimize the CTE mismatch between laser bar and cooler, consequently, a very low "SMILE" of the laser bar can be achieved for small fast axis divergence after collimation. In additional, gold-tin hard solder bonding technology was also developed to minimize the risk of solder electromigration at high current density and thermal fatigue under hard-pulse operation mode. Testing results of IMCC packaged diode lasers are presented in this report.

Paper Details

Date Published: 20 February 2018
PDF: 14 pages
Proc. SPIE 10513, Components and Packaging for Laser Systems IV, 105130Q (20 February 2018); doi: 10.1117/12.2289259
Show Author Affiliations
Boxue Wang, Focuslight Technologies, Inc. (China)
Yangtao Jia, Focuslight Technologies, Inc. (China)
Haoyu Zhang, Focuslight Technologies, Inc. (China)
Shiyin Jia, Focuslight Technologies, Inc. (China)
Jindou Liu, Focuslight Technologies, Inc. (China)
Weifeng Wang, Focuslight Technologies, Inc. (China)
Xingsheng Liu, Focuslight Technologies, Inc. (China)
Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 10513:
Components and Packaging for Laser Systems IV
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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