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Proceedings Article

Infrared, visible, and ultraviolet broadband coherent supercontinuum generation in all-normal dispersion fibers

[+] Author Affiliations
Alexander M. Heidt

Stellenbosch Univ. (South Africa) and IPHT Jena (Germany)

Alexander Hartung, Hartmut Bartelt

IPHT Jena (Germany)

Erich G. Rohwer

Stellenbosch Univ. (South Africa)

Proc. SPIE 7839, 2nd Workshop on Specialty Optical Fibers and Their Applications (WSOF-2), 78390X (October 14, 2010); doi:10.1117/12.867101
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From Conference Volume 7839

  • 2nd Workshop on Specialty Optical Fibers and Their Applications (WSOF-2)
  • Juan Hernández-Cordero; Ismael Torres-Gómez; Alexis Méndez
  • Oaxaca, Mexico | October 13, 2010

abstract

We numerically investigate supercontinuum (SC) generation in fibers with all-normal group velocity dispersion (GVD) under femtosecond pumping, including photonic crystal fibers (PCF), optical nanofibers and suspended core PCF. It is shown that all-normal dispersion (ANDi) fibers are ideally suited to generate extremely flat and more than octave spanning SC spectra which are highly coherent over the entire bandwidth. Due to the suppression of soliton fission in the normal GVD regime, the SC spectra are mainly generated by self-phase modulation and optical wave breaking dynamics, resulting in smooth spectral profiles without significant fine structure. A single pulse is maintained in the time domain, which can be externally compressed to the few-cycle regime. We present specific design examples of ANDi PCF for pumping at 1080 nm and extend the concept to optical nanofibers for deep ultraviolet (UV) SC generation at 400 nm pump wavelength as well as tapered suspended core PCF for visible and near UV SC generation at 465 nm and 530 nm pump wavelength. First "proof of principle" experiments confirm the basic findings of the numerical simulations and show the feasibility of the proposed SC generation scheme.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Alexander M. Heidt ; Alexander Hartung ; Erich G. Rohwer and Hartmut Bartelt
"Infrared, visible, and ultraviolet broadband coherent supercontinuum generation in all-normal dispersion fibers", Proc. SPIE 7839, 2nd Workshop on Specialty Optical Fibers and Their Applications (WSOF-2), 78390X (October 14, 2010); doi:10.1117/12.867101; http://dx.doi.org/10.1117/12.867101


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