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 70 fs pulses at 800 nm. Geometry-induced anomalous dispersion across the resonance allows a compensation of 15% chirp preinduced on Fourier transform limited 70 fs pulses. (c) 2006 American Institute of Physics.
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