Abstract
The performance of filtered analog photonic links, useful
in signal processing applications, is analyzed along
with techniques for compensation of distortion. We
analyze the attributes of various link configurations
and compare the performance of filtered
coherent-detection links with
intensity-modulated-direct-detection links. Experimental
results on the dynamic range and the compensation of
nonlinearities using predistortion compensation are
presented for a filtered coherent link. We demonstrate
suppression of third-order nonlinearity by 20 dB. In
addition to supporting signal processing operations such
as filtering and arbitrary intermediate frequency
downconversion, at the same detected power, we find
filtered coherent links to have up to 9 dB noise figure
advantage over unfiltered direct-detection links,
dependent on the limits of the operating optical power
in the link.
© 2011 IEEE
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