Photonic microwave oscillator based on monolithic DFB lasers with frequencyshifted feedback
01 January 2014
A photonic oscillator, locked to a master RF synthesiser, was built by using a monolithic dual-wavelength DFB semiconductor laser submitted to a frequency-shifted optical feedback. A [3; 10] GHz tuning range is reported, with a phase noise level lower than -70 dBrad2/Hz at a 10 Hz offset from the carrier.