O'Callaghan, JR,Houlihan, J,Voignier, V,Wu, GH,O'Neill, E,McInerney, JG,Huyet, G;

2004

January

IEEE Journal of Quantum Electronics

Spatial coherence and thermal lensing in broad-area semiconductor lasers

Validated

()

gain tailoring high power semiconductor laser thermal lensing INTERNAL TEMPERATURE DISTRIBUTION QUANTUM-WELL LASERS LATERAL-MODES FIELD

40

1

9

Injection profiled broad-area edge-emitting semiconductor lasers demonstrate single transverse mode operation and near-diffraction-limited beam output when driven by pulsed pump current. Thermal effects arising from CW operation induce filamentary dynamics, thus degrading the beam. Transition from the stable nonthermal to the unstable CW regime is analyzed experimentally and numerically, and techniques to improve beam quality in the thermal regime, based on feedback or thermal profiling, are proposed.

DOI 10.1109/JQE.2003.820832