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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 3 — Feb. 5, 2007
  • pp: 1147–1154

Effect of frequency chirp on supercontinuum generation in photonic crystal fibers with two zero-dispersion wavelengths

Hua Zhang, Song Yu, Jie Zhang, and Wanyi Gu  »View Author Affiliations


Optics Express, Vol. 15, Issue 3, pp. 1147-1154 (2007)
http://dx.doi.org/10.1364/OE.15.001147


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Abstract

The effect of initial frequency chirp is investigated numerically to obtain efficient supercontinuum radiation in photonic crystal fibers (PCFs) with two closely spaced zero-dispersion wavelengths. The positive chirps,instead of zero or negative chirps, are recommended because self phase modulation and four-wave mixing can be facilitated by employing positive chirps. In contrast with the complicated and irregular spectrum generated by negative-chirped pulse, the spectrums generated by positive-chirped pulses are wider and much more regular. Moreover, the saturated length of the PCF,corresponding to the maximal spectrum width, can be shortened greatly and the efficiency of frequency conversion is also improved because of initial positive chirps. Nearly all the energy between the zero-dispersion wavelengths can be transferred to the normal dispersion region from the region within the two zero-dispersion wavelengths provided that the initial positive chirp is large enough.

© 2007 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(320.1590) Ultrafast optics : Chirping

ToC Category:
Nonlinear Optics

History
Original Manuscript: November 29, 2006
Revised Manuscript: January 17, 2007
Manuscript Accepted: January 18, 2007
Published: February 5, 2007

Citation
Hua Zhang, Song Yu, Jie Zhang, and Wanyi Gu, "Effect of frequency chirp on supercontinuum generation in photonic crystal fibers with two zero-dispersion wavelengths," Opt. Express 15, 1147-1154 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-3-1147


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References

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