Abstract

A continuous phase-only sampling scheme enabling one to create an ultrahigh-channel-count fiber Bragg grating (FBG) with excellent channel uniformity and high in-band energy efficiency is proposed that is based on the simultaneous utilization of two phase-only sampling functions. With this method, a linearly chirped 135-channel FBG with a length of $10\mathrm{cm}$, a dispersion of $1360\mathrm{ps}∕\mathrm{nm}$, channel spacing of $0.8\mathrm{nm}$, and grating strength of $10\mathrm{dB}$ is theoretically demonstrated, and the maximum refractive index change required is less than ${10}^{-3}$.

© 2009 Optical Society of America

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