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US 2022/0137484 A1Published application
Generation of nested frequency combs in a topological source
AssigneeUniversity of Maryland, College Park
InventorsSunil MITTAL, Mohammad HAFEZI
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Abstract
Examples of the present disclosure include the use of a topological system including an array of coupled ring resonators that exhibits topological edge states to generate frequency combs and temporal dissipative Kerr solitons. The topological edge states constitute a travelling-wave super-ring resonator causing generation of at least coherent nested optical frequency combs, and self-formation of nested temporal solitons that are robust against defects in the array at a mode efficiency exceeding 50%.
Claims20
A method comprising:
- receiving, at at least one input port of a multidimensional array of evanescently coupled constituent ring resonators, pump radiation from at least one radiative pump system,
- wherein the array includes the at least one input port, and at least one output port, and
- wherein the array has a transmission spectrum that comprises:
- a repetition of a group of transmission bands that includes a first transmission edge band between first and second respectively corresponding transmission bulk bands, and
- wherein successive groups from said repetition are separated from one another by a first frequency range;
- and
- producing, at the at least one output port, a first radiative output by circulating the pump radiation in an edge state around a peripheral region of the array that is configured as a closed-loop waveguide resonator,
- wherein, for a chosen first power and a first frequency of said pump radiation, said first radiative output includes a series of groups of pulses of radiation,
- wherein pulses of radiation within each of the groups of pulses of radiation are delayed with respect to one another by a first delay time substantially equal to a round-trip time of propagation of the pump radiation through a constituent ring resonator, and
- wherein the groups of pulses of radiation are delayed with respect to one another by a second delay time substantially equal to the round-trip time of propagation of the pump radiation in the edge state around the peripheral region of the array.
7 more elements
A source radiation comprising:
- at least one radiative pump system;
- a multidimensional array of evanescently coupled constituent ring resonators, the array including at least one input port radiatively coupled with the at least one radiative pump system, and at least one output port,
- the array being configured
- (19A) to have a transmission spectrum that comprises:
- a repetition of a group of transmission bands that includes a first transmission edge band between first and second respectively corresponding transmission bulk bands, and
- wherein successive groups from said repetition are separated from one another by a first frequency range;
- and
- (19B) to produce, at the at least one output port, a first radiative output by circulating pump radiation, received through the at least one input port, in an edge state around a peripheral region of the array that is configured as a closed-loop waveguide resonator,
- wherein, for a chosen first power and a first frequency of said pump radiation, said first radiative output includes a series of groups of pulses of radiation,
- wherein pulses of radiation within each of the groups of pulses of radiation are delayed with respect to one another by a first delay time substantially equal to a round-trip time of propagation of the pump radiation through a constituent ring resonator, and
- wherein the groups of pulses of radiation are delayed with respect to one another by a second delay time substantially equal to the round-trip time of propagation of the pump radiation in the edge state around a peripheral region of the array.
8 more elements
Dependencies are inferred from the claim text.