Abstract
In this paper, the reflection spectra of a raised cosine sampled chirped Bragg grating (SCBG) is obtained by optimizing its grating period chirp. By combining the transfer matrix method for calculating the reflection spectrum of fiber Bragg grating and a genetic algorithm, we obtain a promising method for synthesis. The reconstructed grating period chirp presents non linear distribution at each section of the sampled fiber. To reduce side lobes and ripples, a raised-cosine apodization is applied. Numerical results show that one centimeter of a SCBG presents four channels, the bandwidth of each channel is about 0.6 nm and the wavelength spacing between two neighboring channels is 0.8 nm.
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