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Title

Enhanced degree of temporal coherence through temporal and spatial phase coupling within a focused supercontinuum

Author(s)

Chick, Brendan J.;  Chon, James W. M.;  Gu, Min

Abstract

In the diffraction of a supercontinuum source, a redistribution of amplitude and phase at the focal region is incurred by the coupling between the supercontinuum and the spatial phase caused by the lens diffraction, making it extremely difficult to predict the focal behaviour. We show that the coupling between the temporal phase of a SC source and the spatial phase from the diffraction by a low numerical aperture (NA) lens causes dramatic alterations in the spectra and the temporal coherence near the focal region, and that this effect is maximized in points of singularity. Furthermore, we show that such an enhancement in temporal coherence can be controlled by the pulse evolution through the photonic crystal fiber, in which nonlinear and disperive effects such as the soliton fission process provides the key phase evolution necessary for dramatically changing the coherence time of the focused electromagnetic wave.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Optics Express, Vol. 17, no. 22 (Oct 2009), pp. 20140-20148

Publication year

2009

Keyword(s)

Electromagnetic waves;  Nonlinear optics;  Phase coupling;  Physical optics

Publisher

Optical Society of America

ISSN

1094-4087

Publisher URL

http://dx.doi.org/10.1364/OE.17.020140

Copyright

Copyright © 2009 Optical Society of America. Published version of the paper reproduced here in accordance with the copyright policy of the publisher. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.17.020140. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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