System and method for generating optical frequency combs using an optical waveguide including chirped Bragg gratings

A method of generating an optical frequency comb comprising:

• providing an optical resonator comprising:
• a uniform optical waveguide portion having a uniform waveguide width;
• a first chirped Bragg grating comprising at least first and second periodic variations disposed at a first end of the uniform optical waveguide portion, the first periodic variation having a first refractive index and the second periodic variation having a second refractive index;
• and
• a second chirped Bragg grating disposed at a second end of the uniform optical waveguide portion, the second chirped Bragg grating including the at least first and second periodic variations, wherein a first cavity associated with a first resonant frequency extends between the first periodic variation of the first chirped Bragg grating and the first periodic variation of the second chirped Bragg grating and a second cavity associated with a second resonant frequency extends between the second periodic variation of the first chirped Bragg grating and the second periodic variation of the second chirped Bragg grating;
• receiving a first light beam having a first wavelength at the first chirped Bragg grating, the first wavelength corresponding to the first resonant frequency associated with the first cavity;
• and
• generating an optical frequency comb at the second chirped Bragg grating, the optical frequency comb comprising at least the first light beam having the first wavelength and a second light beam having a second wavelength corresponding to the second resonant frequency of the second cavity.