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In this work, the generation of dual optical frequency combs based on gain-switching and optical injection locking is experimentally examined. The study reveals that an effective process of optical injection can lead to optimized RF combs in terms of span and signal-to-noise ratio. The system also minimizes the overlap of lines and reduces the number of optical components involved, eliminating the need for any external modulator (electro-optic, acousto-optic). The validation of the system was performed as a dual-comb spectrometer, which allowed for determination of the absorption and dispersion profiles of the molecular transition of H-13CN at 1538.523 nm.
natural frequencies; optical materials; absorption and dispersion profile; external modulators; injection locked; molecular transitions; optical components; optical frequency combs; optical injection; optical injection locking; signal to noise ratio