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Numerical analysis of supercontinuum generation in highly nonlinear photonic crystal fibers with ultrashort pulses

Hyoung-Gyu Choi1,2, Chul-Sik Kee1, Hae Yong Park2 and Jae-Eun Kim2

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We have numerically investigated supercontinuum generation in photonic crystal fibers with zero-dispersion wavelengths in the vicinity of 800 nm by using an input pulse with a peak power of about 20 kW and a width of about 10 fs. The effects of fiber dispersion and the input pulse parameters on the generated optical spectra are quantitatively analyzed. The propagation length necessary for the generation of a soliton in the anomalous dispersion region is found to depend on the zero-dispersion wavelength of a fiber. For the generation of a sufficiently broad spectrum, the photonic crystal fiber should be longer than the soliton-generation length. In addition, a spectral recoil effect appears when a solitary wave splits the dispersive wave into two parts.


PACS

42.81.Dp Propagation, scattering, and losses; solitons

42.70.Qs Photonic bandgap materials

42.65.Re Ultrafast processes; optical pulse generation and pulse compression

42.65.Tg Optical solitons; nonlinear guided waves

Subjects

Optics, quantum optics and lasers

Dates

Issue 12 (December 2009)

Received 2 July 2009, accepted for publication 3 September 2009

Published 22 September 2009



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