Abstract

A novel photonic crystal fiber featured by concentric cores is proposed to induce dispersion controllability by photosensitivity. Chromatic dispersion can be changed from 1827 to 72psnmkm with refractive index modulation of 4×104 produced in Ge-doped regions in the fiber. Effective mode area of inner mode is as small as 6.4μm2. The proposed fiber enables to achieve quasi-phase-matched nonlinear parametric interaction in a single piece of photonic crystal fiber, by periodically alternating dispersion and compensating for phase mismatching caused by the dispersion.

© 2007 Optical Society of America

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