Photosensitivity-enabled dispersion controllability for quasi-phase-matching in photonic crystal fibers

Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA.
Optics Letters (Impact Factor: 3.29). 01/2008; 32(24):3498-500. DOI: 10.1364/OL.32.003498
Source: PubMed


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 72 ps/nm/km with refractive index modulation of 4 x 10(-4) produced in Ge-doped regions in the fiber. Effective mode area of inner mode is as small as 6.4 mum(2). 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.

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