Abstract
An in-fiber wavelength-selective optical intensity modulator has been
developed to superimpose low-rate overhead (OH) data on the transit
high-speed payload signals. The tunable fiber Bragg grating, as the heart of
a wavelength-selective modulator (WSM), is designed and properly biased to
implement the desired modulation specification. Potential performance
limitations of WSM are investigated and described in terms of eye opening
penalty and crosstalk between wavelength-division-multiplexing channels. A
simple OH/label erasing technique is also provided and used for modifying
the labels through cascaded WSMs. The performance of such cascaded systems
is calculated both with and without considering the optical loss
compensation. The results confirm the ability of WSMs for low-speed
applications such as QoS management and service level agreement for
differentiated services.
© 2009 IEEE
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