ИСТИНА

A method for generating an optical frequency comb in an optoelectronic oscillator is proposed and investigated. It is based on the modulation expansion of a laser line using large modulation indices. For this case, a double-microwave-input amplitude modulator is used in a single-loop optoelectronic oscillator instead of a usual amplitude modulator, and an optical output is arranged after it. The determination of parameters of the optical comb and microwave oscillation is carried out using numerical modeling, which allows us to investigate highly nonlinear and multimode regimes. The advantage of the scheme is an easy control of all parameters of the optical comb by changing the frequency of the laser, the average frequency of the microwave filter, and the amplitudes of the modulating signals supplied to the modulator arms.