A stopband and passband switchable microwave photonic filter based on integrated dual ring coupled Mach-Zehnder interferometer

Huimin Yang, Jing Li, Pengfei Zheng, Guohua Hu, Yun Binfeng, Yiping Cui
2019 IEEE Photonics Journal  
A stopband and passband switchable microwave photonic filter based on the integrated tunable dual ring coupled Mach-Zehnder interferometer has been demonstrated. By using the optical single sideband modulation, the switchable stopband and passband optical responses of the optical filter are one-to-one mapping to the RF spectra. The center frequency and bandwidth of the switchable microwave photonic filter are both reconfigurable. A frequency tuning range of 4-25 GHz is obtained, and the
more » ... ed, and the bandwidth tuning ranges of the passband and stopband MPFs are 4.54-9.72 GHz and 3.65-6.35 GHz, respectively. In addition, a RF rejection ratio about 20 dB is achieved. Compared with the switchable MPFs implemented by nonintegrated devices, the proposed switchable MPF provides a simple and low cost method to process radiofrequency signals. Index Terms: Microwave photonic filter, microring resonator, Mach-Zehnder interferometer, silicon nitride.
doi:10.1109/jphot.2019.2928834 fatcat:xt5a3snkavdczjs7qz4cjs7dye