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Summary form only given. Photonic band gap (PBG) crystals have been the object of intense investigation regarding the electromagnetic wave propagation phenomena at optical frequencies. Many practical applications of these structures have been suggested, at least in one dimension, for linear and nonlinear systems. We mention the photonic band edge laser, a nonlinear optical limiter and diode, an efficient nonlinear frequency converter, as well as linear optical delay lines and transparent metals. These devices are based on the physics of the band edge, where a fundamental enhancement of the electromagnetic density of modes (DOM), field localization, group velocity reduction, and the availability of exact phase-matching conditions make these devices extremely promising for both lines and nonlinear optical applications. In this work, we numerically study the modification of the reflective and transmissive properties of a one-dimensional (1D) PBG doped with a /spl chi//sup (2)/ material, as pulses at the fundamental (FF) and second-harmonic (SH) frequencies interact under suitable phase-matching conditions near the band edge.