16 W output power by high-efficient spectral beam combining of DBR-tapered diode lasers

André Müller, Deepak Vijayakumar, Ole Bjarlin Jensen, Karl-Heinz Hasler, Bernd Sumpf, Götz Erbert, Peter E. Andersen, Paul Michael Petersen

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Abstract

Up to 16 W output power has been obtained using spectral beam combining of two 1063 nm DBR-tapered diode lasers. Using a reflecting volume Bragg grating, a combining efficiency as high as 93.7% is achieved, resulting in a single beam with high spatial coherence. The result represents the highest output power achieved by spectral beam combining of two single element tapered diode lasers. Since spectral beam combining does not affect beam propagation parameters, M2-values of 1.8 (fast axis) and 3.3 (slow axis) match the M2- values of the laser with lowest spatial coherence. The principle of spectral beam combining used in our experiments can be expanded to combine more than two tapered diode lasers and hence it is expected that the output power may be increased even further in the future.
Original languageEnglish
JournalOptics Express
Volume19
Issue number2
Pages (from-to)1228-1235
ISSN1094-4087
DOIs
Publication statusPublished - 2011

Keywords

  • Laser beam combining
  • Diode lasers

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