Title :
A Tunable Photonic Microwave Filter With a Complex Coefficient Using an Optical RF Phase Shifter
Author :
Yan, Yu ; Yao, Jianping
Author_Institution :
Univ. of Ottawa, Ottawa
Abstract :
A novel tunable photonic microwave filter with complex coefficients is proposed and experimentally demonstrated. The complex coefficient is generated using a wideband tunable optical RF phase shifter that consists of two electrooptic intensity modulators. The phase of the RF signal is shifted by simply adjusting the bias voltages applied to the two electrooptic intensity modulators, and the phase shift remains constant over the microwave spectral region of interest. A two-tap photonic microwave filter with one tunable complex coefficient, with a wide and continuous tuning range, is experimentally demonstrated.
Keywords :
electro-optical modulation; microwave photonics; optical filters; optical phase shifters; intensity modulators; microwave spectral region; tunable photonic microwave filter; two-tap photonic microwave filter; wideband tunable optical RF phase shifter; Electrooptic modulators; Intensity modulation; Microwave filters; Optical filters; Optical modulation; Phase modulation; Phase shifters; Radio frequency; Voltage; Wideband; Microwave photonics; optical RF phase shifter; photonic microwave filter; radio over fiber (RoF);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.903753
