Fig. 1: Visualization and concept of pulse and frequency comb generation.
From: Frequency comb generation via synchronous pumped χ(3) resonator on thin-film lithium niobate
a CW scheme in time and frequency domain; CW light is tuned to the resonant frequency of a microresonator and undergoes four-wave mixing process. The generated frequency comb pulse train has a repetition rate equal to the free spectral range of the microresonator; b Pulse generation and synchronous pumping scheme in time and frequency domain; a pulse train is formed through amplitude and phase modulation of CW light and compressed in a dispersive medium before resonantly driving the microresonator.
