Light-Emitting Materials, Devices, and Technologies

High power and high efficiency 1.8-kW pulsed diode laser bar

[+] Author Affiliations
Manoj Kanskar, Zhigang Chen, Weimin Dong, Xingguo Guan, Shiguo Zhang, Sandrio Elim, Ling Bao, Mike Grimshaw, Mark DeVito

nLIGHT Corp., Vancouver, Washington, United States

J. Photon. Energy. 7(1), 016003 (Mar 06, 2017). doi:10.1117/1.JPE.7.016003
History: Received November 11, 2016; Accepted February 20, 2017
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Abstract.  There is a great interest in the development of high-power, high-efficiency, and low-cost quasicontinuous wave (QCW) diode laser bars and arrays for pumping solid state lasers. We report on the development of kW-class 88x-nm diode laser bars that are based on a bipolar cascade design, in which multiple lasers are epitaxially grown in electrical series on a single substrate and separated by low-resistance tunnel junctions with resistance as low as 8.0×106  Ω-cm2. QCW power of 630 W was demonstrated in a 3-mm-wide minibar with 3-mm cavity length. Peak efficiency of 61% was measured with 200  μs and 14 Hz pulses, at 10°C. Further power scaling was demonstrated in a 1-cm-wide bar with 3-mm cavity length, where a record peak power of 1.8 kW was measured at 1-kA drive current. Ongoing work for further power scaling includes development of triple-junction diode laser bars.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Manoj Kanskar ; Zhigang Chen ; Weimin Dong ; Xingguo Guan ; Shiguo Zhang, et al.
"High power and high efficiency 1.8-kW pulsed diode laser bar", J. Photon. Energy. 7(1), 016003 (Mar 06, 2017). ; http://dx.doi.org/10.1117/1.JPE.7.016003


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