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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 5 — Mar. 1, 2014
  • pp: 1105–1108

Few-cycle solitons and supercontinuum generation with cascaded quadratic nonlinearities in unpoled lithium niobate ridge waveguides

Hairun Guo, Xianglong Zeng, Binbin Zhou, and Morten Bache  »View Author Affiliations


Optics Letters, Vol. 39, Issue 5, pp. 1105-1108 (2014)
http://dx.doi.org/10.1364/OL.39.001105


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Abstract

Formation and interaction of few-cycle solitons in a lithium niobate ridge waveguide are numerically investigated. The solitons are created through a cascaded phase-mismatched second-harmonic generation process, which induces a dominant self-defocusing Kerr-like nonlinearity on the pump pulse. The inherent material self-focusing Kerr nonlinearity is overcome over a wide wavelength range, and self-defocusing solitons are supported from 1100 to 1900 nm, covering the whole communication band. Single cycle self-compressed solitons and supercontinuum generation spanning 1.3 octaves are observed when pumped with femtosecond nanojoule pulses at 1550 nm. The waveguide is not periodically poled, as quasi-phase-matching would lead to detrimental nonlinear effects impeding few-cycle soliton formation.

© 2014 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(320.5520) Ultrafast optics : Pulse compression
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(320.6629) Ultrafast optics : Supercontinuum generation

ToC Category:
Ultrafast Optics

History
Original Manuscript: December 3, 2013
Revised Manuscript: January 16, 2014
Manuscript Accepted: January 16, 2014
Published: February 17, 2014

Citation
Hairun Guo, Xianglong Zeng, Binbin Zhou, and Morten Bache, "Few-cycle solitons and supercontinuum generation with cascaded quadratic nonlinearities in unpoled lithium niobate ridge waveguides," Opt. Lett. 39, 1105-1108 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-5-1105


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