M. Uebernickel, B. Eppich, C. Fiebig, K. Paschke, G. Erbert

Published in:

Proc. SPIE, vol. 7918, no. 79180C (2011).

Abstract:

In this paper, we utilize the concept of the Wigner distribution function (WDF) on distributed-Bragg-reflector taper lasers (DBR-TPL). The WDF allows the derivation of the phase and the intensity distribution just as well as the spatial coherence properties of the laser beam. For a given single-mode fiber the coupling efficiency for a given beam and optical system can be obtained by means of a simple overlap integral. Simultaneously, this approach delivers the corresponding beam forming requirements to meet the optimum coupling condition. We found a good agreement between the measured coupling efficiencies of the DBR-TPL into a single-mode fiber under varying coupling conditions and the corresponding efficiencies derived from the measured WDF by simulating the same coupling conditions.

Keywords:

high power diode lasers, beam propagation factor, Wigner distribution function, coupling efficiency.

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