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Chromatic Dispersion Monitoring Scheme Using Mach-Zender Interferometer and Q-factor Calculation

Ribeiro, V. M. C. ; Costa, Costa, L. N. ; Teixeira, A. ; Nogueira, R.N. ; Lima, M. J. N.

Journal of Optical Communications and Networking Vol. 2, Nº 1, pp. 10 - 19, January, 2010.

ISSN (print): 1943-0620
ISSN (online): 1943-0620

Journal Impact Factor: 1,128 (in 2010)

Digital Object Identifier: 10.1364/JOCN.2.000010

Abstract
In this paper we propose what we believe
to be a novel method for monitoring chromatic dis-
persion (CD). We use radio-frequency (RF) power
monitoring and Q-factor monitoring. We use a method
for capturing opened eye diagrams with high-speed
electro-optical sampling. This allows the calculation
of the Q factor, here used to signal the correct CD.
Simulation results show that with this method it is
possible to have monitoring windows up to 2040
psÕnm at 40 GbitsÕs, using the return-to-zero (RZ) and
carrier-suppressed return-to-zero (CSRZ) modulation
formats. For that to happen we just need to increase
the number of iterations and the monitoring window
of the variable dispersion compensator (VDC) algo-
rithm explained further. With this method we obtain
a high monitoring sensitivity of 0.3363 dBÕ(psÕnm).