Abstract.
A transition from a pure Laguerre–Gaussian (LG) mode to a pattern of optical vortex lattices in a large-Fresnel-number microchip laser is experimentally demonstrated by controlling the cavity Q-factor. The cooperative frequency locking of nearly degenerate modes is found to be a primary process for the generation of the optical vortex lattices in a class-B laser. When the cavity Q-factor is high enough, a LG-like mode and a structure of optical vortex lattices are found to coexist. Competition between coexisting transverse patterns of different symmetry gives rise to chaotic fluctuations.
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Received: 20 March 2002 / Revised version: 20 May 2002 / Published online: 25 October 2002
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Chen, Y., Lan, Y. Spontaneous transverse pattern formation in a microchip laser excited by a doughnut pump profile . Appl Phys B 75, 453–456 (2002). https://doi.org/10.1007/s00340-002-0999-0
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DOI: https://doi.org/10.1007/s00340-002-0999-0