Optoelectronic device for generation a frequency comb

An optoelectronic device for generating a frequency comb, comprising:

• a laser source adapted to emit a pump optical signal, continuous and monochromatic, of a time-constant pump wavelength;
• a ring optical microresonator, comprising:
• a coupling waveguide, comprising an input optically coupled to the laser source, and an output intended to supply the generated frequency comb;
• a first ring waveguide, called resonant ring, coupled optically to the coupling waveguide to generate an optical mode in the resonant ring at a resonance wavelength, and formed in a third order optically non-linear material which exhibits a refractive index and transverse dimensions such that the resonant ring exhibits an abnormal dispersion regime associated with said optical mode;
• a spectral tuning device adapted to tune the resonance wavelength relative to the pump wavelength to form at least one dissipative temporal soliton in the resonant ring, comprising:
• a second ring waveguide, called junction guide, arranged facing the resonant ring so as to be longitudinally coupled optically to the latter, formed in a material whose refractive index exhibits a deviation with respect to that of the core material of the resonant ring allowing the modal coupling between the two waveguides, and comprising a semiconductor junction extending parallel to the resonant ring;
• electrical biasing means adapted to apply a semiconductor junction biasing voltage;
• a control unit, connected to the biasing means and coupled optically to the output, adapted to modify the value of the voltage to cause a modification of an effective index of the optical mode and therefore of the resonance wavelength, until at least one dissipative temporal soliton is formed in the resonant ring.