Abstract
A promising technology for chromatic dispersion compensation
in fiber communication networks are modules based on chirped Bragg gratings
(DCM). Imperfections in the Bragg grating, however, give rise to a noise-like
ripple in the phase characteristics of the DCM, which causes extra system
penalty. In this paper, we derive an analytic formula that calculates an upper
bound of the eye-opening penalty (EOP) caused by a DCM in a transmission link with no optical amplifiers
and with a chirp free NRZ optical signal. The primary use of this formula
is as a quickly calculated quality measure (figure-of-merit) of the phase
ripple characteristics of DCMs. It is shown that the difference in EOP as given by the formula
and obtained from simulation calculations is considerable smaller than given
by other formulas found in the literature.
© 2008 IEEE
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