Title :
Broad-band and extremely flat super-continuum generation via optical parametric gain extended spectrally by fourth-order dispersion in anomalous-dispersion-flattened fibers
Author :
Igarashi, Koji ; Saito, Satoshi ; Kishi, Masato ; Tsuchiya, Masahiro
Author_Institution :
Dept. of Electron. Eng., Tokyo Univ., Japan
Abstract :
Broad-band and extremely flat super-continuum (SC) generation phenomenon was found out in propagation of sub-100 fs and pJ optical pulse along very short anomalous-dispersion-flattened fibers (0.6~3.4 m). In contrast to the usual SC cases, fiber-optic anomalous-dispersion characteristics are essential. Results of numerical and experimental analyzes suggest that its origin stays in the broad-band optical parametric gain generation whose spectrum is extended by fourth-order dispersion characteristics. The remarkable features of SC spectra are (1) excellent static flatness of ±1 dB over 150 nm (or ±0.5 dB over 100 nm) and (2) asymmetric spectral expansion toward the shorter wavelength side overwhelming S-band
Keywords :
optical fibre dispersion; optical parametric devices; optical pulse generation; 0.6 to 3.4 m; 100 fs; S-band; anomalous-dispersion-flattened fibers; asymmetric spectral expansion; broad-band optical parametric gain generation; broad-band super-continuum generation; experimental analysis; extremely flat super-continuum generation; fiber-optic anomalous-dispersion characteristics; fourth-order dispersion; fourth-order dispersion characteristics; numerical analysis; optical parametric gain; optical pulse propagation; static flatness; very short anomalous-dispersion-flattened fibers; Fiber nonlinear optics; Nonlinear optics; Optical fiber communication; Optical fiber dispersion; Optical pulse compression; Optical pulse generation; Optical pulses; Optical solitons; Ultrafast optics; Ultraviolet sources;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2002.1016355
