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Gain saturation and high-power pulsed operation of GaSb-based tapered diode lasers with separately contacted ridge and tapered section

Gewinnsättigung und Pulsbetrieb hoher Leistung von GaSb basierenden trapezförmigen Diodenlasern mit separat kontaktierten Ridge- und Trapezbereichen
 
: Pfahler, C.; Eichhorn, M.; Kelemen, M.T.; Kaufel, G.; Mikulla, M.; Schmitz, J.; Wagner, J.

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Applied Physics Letters 89 (2006), No.2, Art. 021107, 3 pp.
ISSN: 0003-6951
ISSN: 1077-3118
English
Journal Article
Fraunhofer IAF ()
GaSb; high-power diode laser; Hochleistungslaser; tapered laser; Trapezlaser; ridge laser; Ridgelaser; beam quality; Strahlqualität

Abstract
(AlGaIn)(AsSb) ridge-waveguide tapered diode lasers with separately contacted ridge and tapered sections, emitting at 1.93 µm, have been analyzed in pulsed mode with respect to their high-power capability and wavelength tunability. Operating the ridge section above saturation, a variation of the current through this section resulted in a change in lasing wavelength, while changing the current injected into the tapered section at a constant ridge current allowed to vary the output power at constant lasing wavelength. Furthermore, the optical power required to saturate the tapered amplifier section has been derived from a comparison of the experimental characteristics with beam propagation method calculations.

: http://publica.fraunhofer.de/documents/N-50240.html