Abstract
Several publications (see e.g. [1–4]) address the problem of understanding of the group delay ripple (GDR) of chirped fiber Bragg gratings (CFBGs). Along with the intrinsic interest, this problem becomes important for the practical use of these gratings, which are emerging as potential candidates for per-channel tunable dispersion compensation devices.5 In this paper we study the GDR generated in reflection from apodized CFBGs when the principal contribution to GDR is spatial ripple or noise of grating parameters (for example, grating period). We show that spatial noise with frequencies exceeding a certain threshold is cut off and does not appear in the GDR spectrum. Consequently, the frequency of the observed GDR cannot exceed a certain threshold magnitude.
© 2002 Optical Society of America
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