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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
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
1050-2947
0638051-[8pp]
Papoff, F.
1c4e9e0a-8210-49b3-86e2-1d0323b21268
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
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), 0638051-[8pp]. (doi:10.1103/PhysRevA.70.063805).

Record type: Article

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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More information

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
ORCID for G. D'Alessandro: ORCID iD orcid.org/0000-0001-9166-9356

Catalogue record

Date deposited: 12 May 2006
Last modified: 09 Jan 2022 02:47

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Contributors

Author: F. Papoff
Author: G. D'Alessandro ORCID iD

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