Apparatus and method for generating optical frequency combs and solitons

A method of operating an apparatus for generating frequency combs and solitons, the method comprising:

• controlling a relative threshold power of a first nonlinear phenomenon at a first wavelength related to a Q-factor and a second nonlinear phenomenon at a second wavelength by adjusting a degree of coupling between a resonator and a waveguide;
• and
• generating frequency combs generated by different nonlinear phenomena in the resonator while detuning a pump frequency inputted to the resonator when the resonator is adjusted to have a particular degree of coupling,
• wherein the second wavelength is longer than the first wavelength.