Frequency agile microwave photonic notch filter with anomalously-high stopband rejection

摘要

We report a novel class microwave photonic (MWP) notch filter with a verynarrow isolation bandwidth (10 MHz), an ultrahigh stopband rejection (> 60 dB),a wide frequency tuning (1-30 GHz), and flexible bandwidth reconfigurability(10-65 MHz). This record performance is enabled by a new concept of sidebandsamplitude and phase controls using an electro-optic modulator and an opticalfilter. This new concept enables energy efficient operation in active MWP notchfilters, and opens up the pathway to enable low-power nanophotonic devices ashigh performance RF filters.