Distributed feedback lasers in the 760 to 810nm range and epitaxial grating design

O. Brox, F. Bugge, A. Mogilatenko, E. Luvsandamdin, A. Wicht, H. Wenzel and G. Erbert

Published in:

Semicond. Sci. Technol., vol. 29, no. 095018 (2014).

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Abstract:

We present the results from distributed feedback (DFB) lasers with emission wavelengths ranging from 760 to 810 nm and focus on the optimization of Bragg gratings realized with a patterned GaAsP layer that is overgrown with an AlGaAs cladding layer. The impact of the thickness and material composition of the GaAsP grating lines on the DFB laser performance is theoretically and experimentally investigated. 767 nm ridge waveguide DFB lasers with optimized gratings show excellent optoelectronic characteristics in terms of slope efficiency (0.9WA-1) and linewidth (11 kHz).

Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany

Keywords:

semiconductor laser, integrated Bragg grating, small linewidth DFB