High power single mode 980 nm DBR tapered diode lasers with integrated sixth order surface gratings based on simplified fabrication process

Published in:
Proceedings SPIE, vol. 6184, "Semiconductor Lasers and Laser Dynamics II", p.1-7 (2006).
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Abstract:
We report on distributed Bragg reflector tapered lasers having 6^th order surface gratings and ridge waveguides simultaneously fabricated by wafer stepper lithography and reactive ion etching. Single longitudinal mode emission at 978 nm and a beam propagation ratio of M² = 1.1 at 4.4 W have been obtained in quasi-continuous wave operation. In CW operation, a maximal output power of 2.5 W with a side-mode suppression ratio of more than 20 dB and a beam propagation ratio of M² < 1.4 for the central lobe has been achieved.

Keywords:
high brightness, DBR laser, multisegment laser, tapered diode laser, high-power, diffraction limited radiation

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