A Novel Digitally Tunable Microwave-Photonic Notch Filter Using Differential Group-Delay Module
Published Web Locationhttp://ieeexplore.ieee.org/iel5/68/26377/01174147.pdf?isnumber=26377&prod=JNL&arnumber=1174147&arSt=+284&ared=+286&arAuthor=Chen%2C+J.X.%3B+Wu%2C+Y.%3B+Hodiak%2C+J.%3B+Yu%2C+P.K.L.
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 tenability of the filter is achieved through real-time electronic control of the relative delay time.