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Near field analysis of broad-area high-power laser diode using nonlinear bidirectional beam propagation method

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Near field analysis of broad-area high-power laser diode using nonlinear bidirectional beam propagation method

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  • Author: A. Maina, C. Coriasso
A modelling tool based on a nonlinear finite-difference bidirectional Beam Propagation Method (BPM) was developed to study the optical filamentation of the near field in high-power broad-area laser diodes. The near-field pattern, resulting from the multimode laser waveguide in the slow-axis direction, can show strong peaks whose optical density could exceed the Catastrophic Optical Mirror Damage (COMD) threshold. A control of the optical filamentation at the design stage is thus of utmost relevance to fabricate highly reliable high-power semiconductor lasers.

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