Thermal lensing in high-power ridge-waveguide lasers
H. Wenzel , M. Dallmer, G. Erbert
Published in:
Int. Conf. on Numerical Simulation of Optoelectronic Devices (NUSOD 2007), Newark, DE, Sep. 24-28, pp. 13-14 (2007).
Abstract:
The lateral farfield characteristics of ridge-waveguide (RW) lasers emitting around 1064 nm an output power of 1.3 W at an injection current of 2 A were measured and modeled. Due to trenches with widths between 2.5 and 20 µm defining the narrow RW, radiation leaks out into the outer regions which suppresses higher-order modes, but which can also lead to a double-peaked lateral farfield of the fundamental mode. A simple model taking into account the thermal lensing effect explains well the lateral farfield behavior observed.
Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Strasse 4, 12489 Berlin, Germany
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