Abstract
A simple method is reported for transformation of a uniform fiber grating into a linear chirped grating and realization of independent tuning of grating's linear chirp degree and central wavelength. This method involves embedding a uniform grating into a textile laminated beam and creating an odd- symmetrical linear strain distribution along the grating versus its center with a three-point-bending and stretching setup. The grating's central wavelength and chirp degree can be tuned by adjusting the horizontal stretching range and vertical bending displacement on the beam independently. A simulated experiment for compensating the dispersion of a standard single-mode fiber over 100km for 10Gbit/s signal at 1550nm window is successfully demonstrated using such a tunable chirped grating with 10 cm in length.
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