Abstract
The sensitivity of optical performance monitoring with optical
preamplification is analyzed. It is found that the requirement of noise performance
for the preamplifier is much more stringent in monitoring cases than that in
optically preamplified receiver cases. The gain requirements for the two cases,
however, are similar. With sufficient gain, the sensitivity is roughly that of the
corresponding shot-noise limit plus the penalty of the noise figure of the optical
preamplifier. The noise specification of the preamplifier that allows for the
preamplified schemes to outperform non-pre-amplified schemes is also
provided.
© 2002 Optical Society of America
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