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Observation of laser vortex solitons in a self-focusing semiconductor laser

Jimenez Garcia, Jesus and Noblet, Yoann and Paulau, P.V. and Gomila, Damia and Ackemann, Thorsten (2013) Observation of laser vortex solitons in a self-focusing semiconductor laser. Journal of Optics, 15 (4). ISSN 0972-8821

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We report the observation of single and multiple vortex solitons in a self-focusing dissipative system, a broad-area vertical-cavity surface-emitting laser (VCSEL) with frequency-selective feedback by a volume Bragg grating. They are bistable and the transitions between different soliton structures are analysed. The observations qualitatively verify theoretical predictions based on simplified models for a semiconductor laser with frequency-selective feedback.