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Broad-band and extremely flat super-continuum generation via optical parametric gain extended spectrally by fourth-order dispersion in anomalous-dispersion-flattened fibers

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4 Author(s)
K. Igarashi ; Dept. of Electron. Eng., Tokyo Univ., Japan ; S. Saito ; M. Kishi ; M. Tsuchiya

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

Published in:

IEEE Journal of Selected Topics in Quantum Electronics  (Volume:8 ,  Issue: 3 )