An optoelectronic oscillator (OEO) comprising: a set of optical domain components ; a downconverter in communication with an output of the set of optical domain components ; and a set of radio frequency (RF) domain components in communication with an output of the downconverter , the set of RF domain components comprising: a tunable filter operating at a filter center frequency and having an output coupled to the set of optical domain components for communicating a mode selection result, the tunable filter including: a tuner ; a fixed frequency sub-filter operating at a sub-filter center frequency to provide mode selection and adjacent mode suppression with respect to the tunable filter center frequency, the sub-filter center frequency being lower than the tunable filter center frequency, and a ratio of the tunable filter center frequency to a bandwidth of the sub-filter being at least 1000:1; and a feedback corrector , the feedback corrector including: a phase modulator ; a first input coupled to the tuner ; a second input coupled to the tunable filter , and an output coupled to the set of optical domain components ; wherein the phase modulator couples the tunable filter to the set of optical domain components . a set of optical domain components ; a downconverter in communication with an output of the set of optical domain components ; and a set of radio frequency (RF) domain components in communication with an output of the downconverter , the set of RF domain components comprising: a tunable filter operating at a filter center frequency and having an output coupled to the set of optical domain components for communicating a mode selection result, the tunable filter including: a tuner ; a fixed frequency sub-filter operating at a sub-filter center frequency to provide mode selection and adjacent mode suppression with respect to the tunable filter center frequency, the sub-filter center frequency being lower than the tunable filter center frequency, and a ratio of the tunable filter center frequency to a bandwidth of the sub-filter being at least 1000:1; and a feedback corrector , the feedback corrector including: a phase modulator ; a first input coupled to the tuner ; a second input coupled to the tunable filter , and an output coupled to the set of optical domain components ; a tuner ; a fixed frequency sub-filter operating at a sub-filter center frequency to provide mode selection and adjacent mode suppression with respect to the tunable filter center frequency, the sub-filter center frequency being lower than the tunable filter center frequency, and a ratio of the tunable filter center frequency to a bandwidth of the sub-filter being at least 1000:1; and a feedback corrector , the feedback corrector including: a phase modulator ; a first input coupled to the tuner ; a second input coupled to the tunable filter , and an output coupled to the set of optical domain components ; a phase modulator ; a first input coupled to the tuner ; a second input coupled to the tunable filter , and an output coupled to the set of optical domain components ; wherein the phase modulator couples the tunable filter to the set of optical domain components . <EOS>