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Proceedings Paper

Macro-channel cooled high power fiber coupled diode lasers exceeding 1.2kW of output power
Author(s): Tobias Koenning; Kim Alegria; Zuolan Wang; Armin Segref; Dean Stapleton; Wilhelm Faßbender; Marco Flament; Karsten Rotter; Axel Noeske; Jens Biesenbach
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Paper Abstract

We report on a new series of fiber coupled diode laser modules exceeding 1.2kW of single wavelength optical power from a 400um / 0.2NA fiber. The units are constructed from passively cooled laser bars as opposed to other comparably powered, commercially available modules that use micro-channel heat-sinks. Micro-channel heat sinks require cooling water to meet demanding specifications and are therefore prone to failures due to contamination and increase the overall cost to operate and maintain the laser. Dilas' new series of high power fiber coupled diode lasers are designed to eliminate micro channel coolers and their associated failure mechanisms. Low-smile soldering processes were developed to maximize the brightness available from each diode laser bar. The diode laser brightness is optimally conserved using Dilas' recently developed propriety laser bar stacking geometry and optics. A total of 24 bars are coupled into a single fiber core using a polarization multiplexing scheme. The modular design permits further power scaling through wavelength multiplexing. Other customer critical features such as industrial grade fibers, pilot beams, fiber interlocks and power monitoring are standard features on these modules. The optical design and the beam parameter calculations will be presented to explain the inherit design trade offs. Results for single and dual wavelengths modules will be presented.

Paper Details

Date Published: 21 February 2011
PDF: 8 pages
Proc. SPIE 7918, High-Power Diode Laser Technology and Applications IX, 79180E (21 February 2011); doi: 10.1117/12.875795
Show Author Affiliations
Tobias Koenning, DILAS Diode Laser, Inc. (United States)
Kim Alegria, DILAS Diode Laser, Inc. (United States)
Zuolan Wang, DILAS Diode Laser, Inc. (United States)
Armin Segref, DILAS Diode Laser, Inc. (United States)
Dean Stapleton, DILAS Diode Laser, Inc. (United States)
Wilhelm Faßbender, DILAS Diodenlaser GmbH (Germany)
Marco Flament, DILAS Diodenlaser GmbH (Germany)
Karsten Rotter, DILAS Diodenlaser GmbH (Germany)
Axel Noeske, DILAS Diodenlaser GmbH (Germany)
Jens Biesenbach, DILAS Diodenlaser GmbH (Germany)

Published in SPIE Proceedings Vol. 7918:
High-Power Diode Laser Technology and Applications IX
Mark S. Zediker, Editor(s)

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