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High-power 2.0 µm semiconductor disk laser-influence of lateral lasing

: Töpper, T.; Rattunde, Marcel; Kaspar, S.; Moser, R.; Manz, Christian; Köhler, Klaus; Wagner, Joachim


Applied Physics Letters 100 (2012), Nr.19, Art. 192107, 3 S.
ISSN: 0003-6951 (Print)
ISSN: 1077-3118
ISSN: 1931-9401 (online)
Fraunhofer IAF ()

The influence of lateral lasing on the high-power performance of 2 m GaSb-based optically pumped semiconductor disk laser (SDL) has been investigated. The maximum cw output power of the SDL exceeded 4.1 W at 20 °C heat sink temperature. The occurrence of lateral lasing was observed by recording the emission spectrum and the emitted optical power in the in-plane direction of the SDL chip. We investigated the conditions for which lateral lasing occurs and demonstrate an effective means to suppress this unwanted phenomenon even for small SDL chip sizes comparable to the pump spot diameter.