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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 22 — Oct. 26, 2009
  • pp: 20140–20148

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

Brendan J. Chick, James W.M. Chon, and Min Gu  »View Author Affiliations

Optics Express, Vol. 17, Issue 22, pp. 20140-20148 (2009)

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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.

© 2009 Optical Society of America

OCIS Codes
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(050.0050) Diffraction and gratings : Diffraction and gratings
(190.0190) Nonlinear optics : Nonlinear optics
(260.0260) Physical optics : Physical optics

ToC Category:
Coherence and Statistical Optics

Original Manuscript: September 25, 2009
Revised Manuscript: October 19, 2009
Manuscript Accepted: October 19, 2009
Published: October 20, 2009

Brendan J. Chick, James W. M. Chon, and Min Gu, "Enhanced degree of temporal coherence through temporal and spatial phase coupling within a focused supercontinuum," Opt. Express 17, 20140-20148 (2009)

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