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Near-field dynamics of broad area diode laser at very high pump levels

: Hempel, M.; Tomm, J.W.; Baeumler, M.; Konstanzer, H.; Mukherjee, J.

Postprint urn:nbn:de:0011-n-1929927 (695 KByte PDF)
MD5 Fingerprint: c1e0d689bec98da3a37052e6094bfcf2
Copyright AIP
Erstellt am: 2.2.2012

AIP Advances 1 (2011), Nr.4, Art. 042148, 6 S.
ISSN: 2158-3226
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IAF ()

Near-field properties of the emission of broad area semiconductor diode lasers under extremely high pumping of up to ~ 50 times the threshold are investigated. Atransition from a gain to thermally-induced index guiding is shown under operation with single pulses of 300 ns duration. At highest output powers, catastrophic optical damage is observed which is studied in conjunction with the evolution of time-averaged filamentary near-field properties. Dynamics of the process is resolved on a picosecond time scale.