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Proceedings Paper

High brightness diodes and 600W 62% efficient low SWaP fiber-coupled package
Author(s): M. Kanskar; C. Bai; L. Bao; Z. Chen; C. Chiong; M. DeFranza; K. Fortier; M. Hemenway; S. Li; E. Martin; J. Small; B. Tomakian; W. Urbanek; B. Wilkins; J. Zhang
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Paper Abstract

In this paper, we show results of further brightness improvement and power-scaling enabled by both the rise in chip brightness/power and the increase in number of chips coupled into a given numerical aperture. We report a new chip technology using new extra Reduced-mode (x-REM) diode design providing a record ~363 W output from a 2×12 nLIGHT element® in 105 μm diameter fiber. There is also an increasing demand for low size, weight and power-consumption (SWaP) fiber-coupled diodes for compact High Energy Laser (HEL) systems for defense and industrial applications. Using thirty single emitters that were geometricallyand polarization-combined, we have demonstrated 600 watts and 62% efficiency at in 225 μm/0.22 NA fiber resulting in specific mass and volume of 0.44 kg/kW and of 0.5 cm3/W respectively. Furthermore, we have increased the number of chips to forty and increased the output power to 1kW and 52% in the same fiber diameter and numerical aperture. This results in a fiber-coupled package with specific mass and volume of <0.18 kg/kW and <0.27 cm3/W, respectively.

Paper Details

Date Published: 2 March 2020
PDF: 6 pages
Proc. SPIE 11262, High-Power Diode Laser Technology XVIII, 112620A (2 March 2020); doi: 10.1117/12.2547538
Show Author Affiliations
M. Kanskar, nLIGHT, Inc. (United States)
C. Bai, nLIGHT, Inc. (United States)
L. Bao, nLIGHT, Inc. (United States)
Z. Chen, nLIGHT, Inc. (United States)
C. Chiong, nLIGHT, Inc. (United States)
M. DeFranza, nLIGHT, Inc. (United States)
K. Fortier, nLIGHT, Inc. (United States)
M. Hemenway, nLIGHT, Inc. (United States)
S. Li, nLIGHT, Inc. (United States)
E. Martin, nLIGHT, Inc. (United States)
J. Small, nLIGHT, Inc. (United States)
B. Tomakian, nLIGHT, Inc. (United States)
W. Urbanek, nLIGHT, Inc. (United States)
B. Wilkins, nLIGHT, Inc. (United States)
J. Zhang, nLIGHT, Inc. (United States)

Published in SPIE Proceedings Vol. 11262:
High-Power Diode Laser Technology XVIII
Mark S. Zediker, Editor(s)

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