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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 9 — May. 6, 2013
  • pp: 10764–10771

Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers

Jacob Ramsay, Sune Dupont, Mikkel Johansen, Lars Rishøj, Karsten Rottwitt, Peter Morten Moselund, and Søren Rud Keiding  »View Author Affiliations


Optics Express, Vol. 21, Issue 9, pp. 10764-10771 (2013)
http://dx.doi.org/10.1364/OE.21.010764


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Abstract

Using femtosecond upconversion we investigate the time and wavelength structure of infrared supercontinuum generation. It is shown that radiation is scattered into higher order spatial modes (HOMs) when generating a supercontinuum using fibers that are not single-moded, such as a step-index ZBLAN fiber. As a consequence of intermodal scattering and the difference in group velocity for the modes, the supercontinuum splits up spatially and temporally. Experimental results indicate that a significant part of the radiation propagates in HOMs. Conventional simulations of super-continuum generation do not include scattering into HOMs, and including this provides an extra degree of freedom for tailoring supercontinuum sources.

© 2013 OSA

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.7220) Nonlinear optics : Upconversion
(320.6629) Ultrafast optics : Supercontinuum generation

ToC Category:
Ultrafast Optics

History
Original Manuscript: January 30, 2013
Revised Manuscript: April 5, 2013
Manuscript Accepted: April 9, 2013
Published: April 25, 2013

Citation
Jacob Ramsay, Sune Dupont, Mikkel Johansen, Lars Rishøj, Karsten Rottwitt, Peter Morten Moselund, and Søren Rud Keiding, "Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers," Opt. Express 21, 10764-10771 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-9-10764


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