Title :
A novel digitally tunable microwave-photonic notch filter using differential group-delay module
Author :
Chen, J.X. ; Wu, Y. ; Hodiak, J. ; Yu, P.K.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
We demonstrate a digitally tunable microwave-photonic notch filter based on a differential group-delay module which produces a relative delay between two orthogonal polarizations. A maximum rejection level greater than 60 dB is obtained. The tunability of the filter is achieved through real-time electronic control of the relative delay time.
Keywords :
delays; frequency response; microwave filters; microwave photonics; notch filters; optical fibre filters; optical fibre polarisation; optical tuning; differential group-delay module; digitally tunable microwave-photonic notch filter; filter tunability; frequency response; maximum rejection level; orthogonal polarizations; real-time electronic control; relative delay; relative delay time; Delay effects; Digital filters; Distributed feedback devices; Microwave filters; Optical fiber polarization; Optical filters; Optical noise; Optical polarization; Optical signal processing; Transversal filters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.806854
