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US 2018/0062603 A1Published application
Photonics based tunable multiband microwave filter
AssigneeUniversity of Georgia Research Foundation, Inc.
InventorsMABLE P. FOK, JIA GE
Life of this patent
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Abstract
Various examples are provided for tunable radio frequency (RF) filtering. In one example, a RF multiband filter includes a Lyot filter including a tunable birefringence loop including a circulator and a polarization controller (PC) and a phase modulator (PM). The Lyot filter can generate an optical comb based at least in part upon a received optical signal and a polarization rotation angle of the polarization controller. The phase modulator (PM) can generate a modulated tap signal by modulating the optical comb by a RF input signal.
Claims20
A radio frequency (RF) filter, comprising:
- a Lyot filter comprising a tunable birefringence loop comprising a circulator and a polarization controller (PC), the Lyot filter configured to generate an optical comb based at least in part upon a received optical signal and a polarization rotation angle of the polarization controller;
- and
- a phase modulator (PM) configured to generate a modulated tap signal by modulating the optical comb by a RF input signal.
Dependencies are inferred from the claim text.