Theoretical and experimental analysis of the lateral modes of high-power broad-area lasers
H. Wenzel1, P. Crump1, H. Ekhteraei1, C. Schultz1, J. Pomplun2, S. Burger3, L. Zschiedrich2, F. Schmidt3 and G. Erbert1
Published in:
11th Int. Conf. on Numerical Simulation of Optoelectronic Devices (NUSOD 2011), Rom, Italy, Sep. 5-8 (2011).
Abstract:
For maximum fiber-coupled power, broad-area (BA) diode lasers must operate with small lateral far field angles. However, these structures are laterally multi-moded, with low beam quality and wide emission angles. We use a combination of device simulation and diagnostic measurements to determine the physical factors limiting the lateral far field angle in state of the art BA lasers emitting at 975 nm. Two-dimensional simulations of the optical field enable the dominant lateral waveguiding mechanisms to be diagnosed. Spectrally resolved near and far field measurements will allow us to determine the nature of the lateral modes.
1 Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
2 JCMwave GmbH, Bolivarallee 22, 14050 Berlin, Germany
3 Zuse-Institut Berlin, Takustr. 7, 14195 Berlin, Germany
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