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Proceedings Paper

Efficient concept generating 3.9 W of diffraction-limited green light with spectrally combined tapered diode lasers
Author(s): André Müller; Ole Bjarlin Jensen; Karl-Heinz Hasler; Bernd Sumpf; Götz Erbert; Peter E. Andersen; Paul Michael Petersen
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Paper Abstract

We propose an efficient concept increasing the power of diode laser systems in the visible spectral range. In comparison with second harmonic generation of single emitters, we show that spectral beam combining with subsequent sumfrequency generation enhances the available power significantly. Combining two 1060 nm distributed Bragg reflector tapered diode lasers (M2 ≤ 5.2), we achieve a 2.5-3.2 fold increase of green light with a maximum power of 3.9 Watts in a diffraction-limited beam (M2 ≤ 1.3). Without any further stabilization the obtained power stability is within ± 2.6 %. The electro-optical and nonlinear conversion efficiencies at maximum performance are 5.7 % and 2.6 %/W, respectively. Due to the intrinsic wavelength stabilization of the diodes we achieve single-mode emission with a sidemode suppression < 15 dB and a spectral width as narrow as 5 pm. These results increase the application potential of green diode laser systems, for example, within the biomedical field. In order to enhance the power even further, our proposed concept can be expanded combining multiple diode lasers.

Paper Details

Date Published: 12 March 2013
PDF: 9 pages
Proc. SPIE 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII, 860404 (12 March 2013); doi: 10.1117/12.2002032
Show Author Affiliations
André Müller, Technical Univ. of Denmark (Denmark)
Ole Bjarlin Jensen, Technical Univ. of Denmark (Denmark)
Karl-Heinz Hasler, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
Bernd Sumpf, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
Götz Erbert, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (Germany)
Peter E. Andersen, Technical Univ. of Denmark (Denmark)
Paul Michael Petersen, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 8604:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII
Konstantin L. Vodopyanov, Editor(s)

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