Femtosecond pulses chirping compensation by using one-dimensional compact multiple-defect photonic crystals

Abstract

Transmission properties of ultrashort pulses propagating through one-dimensional photonic crystals with multiple defects (cavities) were experimentally investigated. Coupling between multiple cavities is responsible for a wide resonance inside the photonic crystal gap suitable to distortion free propagation of 70fs pulses at 800nm. Geometry-induced anomalous dispersion across the resonance allows a compensation of 15% chirp preinduced on Fourier transform limited 70fs pulses.