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Proceedings Paper

Fiber-coupled modules producing >300W and >600W from a 225 micron fiber, with <0.7 kg/kW weight-power ratio
Author(s): Chris Ebert; David Irwin; Tina Guiney; Dean Stapleton; Steve Patterson
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Paper Abstract

Specifically optimized for both high efficiency and low SWaP, DILAS Diode Laser, Inc. continues to improve and optimize high-brightness fiber-laser pump modules. Starting with a <53% electrical-optical efficient 330W module in full production, power-scaled versions capable of 625 W and 900 W will also be covered. Utilizing a 225um/0.22 NA fiber output, these pumps enable single-mode kW-class fiber amplifiers ranging from 1 kW to 3kW. Designed for low SWaP, these modules are produced using mounted diode laser bars from a standard manufacturing line and commercial, off-theshelf optics. Cooling is accomplished through macro channel coolers that eliminate the need for micro-channels and the associated coolant issues. This innovative macro channel cooler is specifically designed to reduce both weight and thermal resistance, and also provides an ideal substrate for power-scaling the diode module while maintaining efficiency. Utilizing AuSn hard solder on CTE matched substrates eliminates the problems associated with Indium-based diode solder joints and permits hard pulsing of the laser diodes with any pulse width/duty cycle parameter set. Optional VBG stabilization is available on all versions for applications requiring wavelength stability over a wide temperature range.

Paper Details

Date Published: 13 May 2016
PDF: 9 pages
Proc. SPIE 9834, Laser Technology for Defense and Security XII, 98340I (13 May 2016);
Show Author Affiliations
Chris Ebert, DILAS Diode Laser, Inc. (United States)
David Irwin, DILAS Diode Laser, Inc. (United States)
Tina Guiney, DILAS Diode Laser, Inc. (United States)
Dean Stapleton, DILAS Diode Laser, Inc. (United States)
Steve Patterson, DILAS Diode Laser, Inc. (United States)

Published in SPIE Proceedings Vol. 9834:
Laser Technology for Defense and Security XII
Mark Dubinskii; Stephen G. Post, Editor(s)

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