Spontaneous improvement of spatial coherence and frequency locking in high-pump-power multimode lasers
Spontaneous improvement of spatial coherence and frequency locking in high-pump-power multimode lasers
By using the time average of amplitude products we are able to identify changes in the dynamical complexity and the spatial coherence of a multimode laser. We find that there are cases in which as the pump increases, the dynamical complexity decreases and the spatial coherence improves. In some limiting cases the complexity is reduced to zero and the beam is completely coherent spatially. We show that these phenomena are caused by phase synchronization of the mode amplitudes and that they can be observed using slow detectors.
light coherence, laser beams, synchronisation, laser modes, nonlinear optics, spatiotemporal phenomena, laser mode locking
0638051-[8pp]
Papoff, F.
1c4e9e0a-8210-49b3-86e2-1d0323b21268
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
10 December 2004
Papoff, F.
1c4e9e0a-8210-49b3-86e2-1d0323b21268
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
Papoff, F. and D'Alessandro, G.
(2004)
Spontaneous improvement of spatial coherence and frequency locking in high-pump-power multimode lasers.
Physical Review A, 70 (6), .
(doi:10.1103/PhysRevA.70.063805).
Abstract
By using the time average of amplitude products we are able to identify changes in the dynamical complexity and the spatial coherence of a multimode laser. We find that there are cases in which as the pump increases, the dynamical complexity decreases and the spatial coherence improves. In some limiting cases the complexity is reduced to zero and the beam is completely coherent spatially. We show that these phenomena are caused by phase synchronization of the mode amplitudes and that they can be observed using slow detectors.
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Published date: 10 December 2004
Keywords:
light coherence, laser beams, synchronisation, laser modes, nonlinear optics, spatiotemporal phenomena, laser mode locking
Identifiers
Local EPrints ID: 29309
URI: http://eprints.soton.ac.uk/id/eprint/29309
ISSN: 1050-2947
PURE UUID: 6760c440-e3b0-4726-b62d-bb648de06bbf
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Date deposited: 12 May 2006
Last modified: 16 Mar 2024 02:48
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Author:
F. Papoff
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