Patent ID: 11862924
Assignee: nan
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 14:
15. A device comprising:
first, second, third, fourth, fifth, sixth, seventh and eight elements that are optically coupled;
a first element comprising an optical gain structure and one laser cavity mirror structure;
a second element and a third element, each comprising a phase tuner;
a fourth element and a fifth element, each comprising a frequency-selective filter;
a sixth element comprising a first optical resonator with first and second coupler/splitter structures;
a seventh element comprising a second optical resonator with third and fourth coupler/splitter structures; and
an eighth element, comprising a structure providing photodetector functionality, the eighth element being optically coupled to first and second resonators through the second and fourth coupler/splitter structures;
wherein first, second, fourth and sixth elements cooperate to form a first laser cavity, and light coupled into the first optical resonator through the first coupler/splitter structure is injected back into the optical gain structure of the first element through the fourth and second elements;
wherein first, third, fifth and seventh elements cooperate to form a second laser cavity, and light coupled into the second optical resonator through the third coupler/splitter structure is injected back into the optical gain structure of the first element through the fifth and third elements;
wherein a first optical signal outputted from the first laser cavity through the second coupler/splitter structure and a second optical signal output from the second laser cavity through the fourth coupler/splitter structure are optically mixed and down-converted to lower frequencies at the eighth element; and
wherein characteristic of the first, second, third and fourth coupler/splitter structures and the first and second optical resonators are selected such that the light injected back into the optical gain structure suppresses noise in the first and second optical signals.