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Supercontinuum Generation and Pulse Compression in Short Fibers for Optical Pulses Generated by 1.5 µm Optical Parametric Oscillator

Supercontinuum (SC) optical pulses in the 1.5 µm region with a spectral width of approximately 300 nm are generated by a normal group velocity dispersion fiber of 1 m length using an optical parametric oscillator. The SC generations are accurately reproduced by analysis of a nonlinear Schrödinger equation including the optical Kerr effect and second-order dispersion. The compensation of the up-chirp of the SC pulses effectively compresses the pulsewidth to 60 fs in an anomalous group velocity dispersion fiber of 50 cm length. The ultrashort optical pulses generated by this technique will become a useful source for the characterization of materials and devices operating at fiber telecommunication wavelength.