High-brightness emission from stripe-array broad area diode lasers operated in off-axis external cavities

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Title High-brightness emission from stripe-array broad area diode lasers operated in off-axis external cavities
Author Jechow, Andreas; Skoczowsky, Danilo; Lichtner, Mark; Radziunas, Mindaugas; Menzel, Ralf
Publication Title Proceedings of Conference on High-Power Diode Laser Technology and Applications VIII
Editor M.S. Zediker
Year Published 2010
Place of publication USA
Publisher SPIE
Abstract Phase-coupled stripe-array diode lasers show a strong double-lobed far-field because adjacent stripes tend to operate in the anti-phase supermode. One way to achieve a stable phase relationship and global coupling of the emitters of such a stripe-array is off-axis feedback. In this work several off-axis external cavity designs are discussed. A 400 μm wide emitter stripe array consisting of 40 stripes with a pitch of 10 μm was investigated. By operating this device in a Littrow type off-axis external cavity, more than 2 W of output power of near diffraction-limited, single longitudinal mode emission with a brightness as high as 87MW/cm²-str could be achieved. The technique of off-axis feedback was also adapted to realize spectral beam combining of 25 emitters of a laser bar. The experimental data are compared with numerical simulations using a new theoretical model including feedback.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1117/12.843047
Copyright Statement Copyright 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
ISBN 0277-786X
Conference name Photonics West 2010
Location San Francisco
Date From 2010-01-23
Date To 2010-01-28
URI http://hdl.handle.net/10072/37757
Date Accessioned 2011-03-14
Language en_US
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Lasers and Quantum Electronics
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1x

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