Simulations and analysis of beam quality improvement in spatially modulated broad area edge-emitting devices

Mindaugas Radziunas; Ramon Herrero; Muriel Botey; Kestutis Staliunas

doi:10.1117/12.2051909

2 May 2014 Simulations and analysis of beam quality improvement in spatially modulated broad area edge-emitting devices

Mindaugas Radziunas, Ramon Herrero, Muriel Botey, Kestutis Staliunas

Proceedings Volume 9134, Semiconductor Lasers and Laser Dynamics VI; 91340Q (2014) https://doi.org/10.1117/12.2051909
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

Abstract

We simulate and analyze how beam quality improves while being amplified in edge emitting broad area semiconductor amplifiers with a periodic structuring of the electrical contacts, in both longitudinal and lateral directions. A spatio-temporal traveling wave model is used for simulations of the dynamics and nonlinear interactions of the optical fields, induced polarizations and carrier density. In the case of small beam amplification, the optical field can be expanded into few Bloch modes, so that the system is described by a set of ODEs for the evolution of the mode amplitudes. The analysis of such model provides a deep understanding of the impact of the different parameters on amplification and on spatial (angular) filtering of the beam. It is shown that under realistic parameters the two-dimensional modulation of the current can lead not only to a significant reduction of the emission divergence, but also to an additional amplification of the emitted field.

Citation Download Citation

Mindaugas Radziunas, Ramon Herrero, Muriel Botey, and Kestutis Staliunas "Simulations and analysis of beam quality improvement in spatially modulated broad area edge-emitting devices", Proc. SPIE 9134, Semiconductor Lasers and Laser Dynamics VI, 91340Q (2 May 2014); https://doi.org/10.1117/12.2051909

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