The relationship between group-delay ripple and the apodization
profile of chirped Bragg gratings is analyzed. Simple physical
explanations are given for departures from ideal linear group delay by
use of only the concepts of reflection at discontinuities and band gaps
and the optical path lengths of cavities. Quantitative expressions
are obtained for the amplitudes, phases, and periods of both the fast
and slow components of the ripple.
© 2000 Optical Society of America
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