The application discloses an
optical frequency comb automatic
recovery device and method, and belongs to the field of
silicon-based
nonlinear optical photoelectric modulation. The application comprises a
laser, an IQ modulator, an acousto-optic modulator, a
fiber amplifier, a
polarization controller, a micro-ring
resonator, a phase-locked loop, an
arbitrary waveform generator, a photoelectric
detector, a PID module and an upper computer.
Transmission loss of an
optical frequency comb debugging
system is tested, which comprises
fiber loss before
laser enters a microcavity and
transmission loss after the
laser enters the microcavity; the output frequency range of the phase-locked loop is adjusted, and frequency scanning is performed on the microcavity; laser
wavelength is entered from blue detuning, the output power of the laser is gradually reduced through the acousto-optic modulator, and the
wavelength is kept unchanged; when the PID detects a power rise, the laser power is quickly raised until the PID detects a rising step; the
laser frequency is slowly increased and the power is kept unchanged until a single
soliton optical frequency comb is observed; when the single
soliton disappears, the control steps after the laser
wavelength is entered from blue detuning are repeated, and the optical
frequency comb is automatically recovered.