Multiple vertical mode high power 975 nm diode lasers restricted to single vertical mode operation through use of optical facet coatings
P. Crump, H. Wenzel, P. Ressel, G. Erbert and G. Tränkle
Published in:
Electron. Lett., vol. 45, no. 1, pp. 51-53 (2009).
Abstract:
A new design approach has been developed for facet coating of high power diode lasers, that is shown to preferentially suppress higherorder guided optical modes, without any degradation in device performance. Repeated optical coating of reference lasers is found to controllably transform the vertical far field from a three-peaked higher-order mode to a single-peaked fundamental mode, in good agreement with simulations. 975 nm devices with such coatings reach power conversion efficiency of 65%.
Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
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