All-optical microwave bandpass filter with negative coefficients based on a phase modulator and linearly chirped fiber Bragg gratings.
A novel all-optical microwave bandpass filter with negative coefficients is presented. Positive and negative coefficients are obtained through conversion from phase modulation to intensity modulation by passing the phase-modulated optical carriers through chirped fiber Bragg gratings having group-delay responses with positive and negative slopes. A two-tap transversal microwave filter with one negative coefficient is experimentally implemented.
Zeng
Fei
F
Microwave Photonics Research Laboratory, School of Information Technology and Engineering, University of Ottawa, Ottawa, Ontario, Canada.
Wang
Jun
J
Yao
Jianping
J