Abstract
A new microwave photonic filter structure that realizes both
a multitap, flat-top radio-frequency bandpass filter and bipolar taps, while
also exhibiting low-noise operation, is presented. It is based on using a
phase-modulated laser signal propagating through a novel sinusoidal group
delay grating, which induces tailored phase shifts to the carrier and sidebands.
The filter integrates tap weighting and delays simultaneously in one unit,
which enables multiple-tap low-noise signal processing together with negative
coefficients. Experimental results demonstrate the realization of a flat-top
bandpass filter response with 7.8-GHz free spectral range and more than 45-dB
rejection ratio. Extensions to this concept by connecting additional sinusoidal
group delay gratings in cascade, to provide enhanced signal processing functions,
are also described.
© 2008 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription