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Analysis of spatial emission structures in vertical-cavity surface-emitting lasers with feedback from a volume Bragg grating

Noblet, Y. and Ackemann, T. (2012) Analysis of spatial emission structures in vertical-cavity surface-emitting lasers with feedback from a volume Bragg grating. Physical Review A, 85 (5). ISSN 1094-1622

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Abstract

We investigate the spatial and spectral properties of broad-area vertical-cavity surface-emitting lasers with frequency-selective feedback by a volume Bragg grating. We demonstrate wavelength locking similar to the case of edge emitters but the spatial mode selection is different from the latter. On-axis spatial solitons obtained at threshold give way to off-axis extended lasing states beyond threshold. The investigations focus on a self-imaging external cavity. We analyze how deviations from the self-imaging condition affect the pattern formation and a certain robustness of the phenomena is demonstrated.