Dual optical frequency comb light-emitting device
A dual optical frequency comb light-emitting device includes a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length, a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length, and an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator. The first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside. The second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside.
1. A dual optical frequency comb light-emitting device comprising:
a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length;
a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length; and
an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator,
a first output port,
a second output port,
wherein the first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside via the first output port, and
wherein the second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside via the second output port, and
the second portion of the first optical-frequency-comb laser light output to the outside via the first output port is not input into the second laser resonator.
2. A dual optical frequency comb light-emitting device comprising:
a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length;
a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length; and
an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator,
wherein the first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside,
wherein the second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside,
wherein the optical coupler includes a filter that allows light in a certain frequency band to pass through, and
wherein the optical coupler causes the first portion of the first optical-frequency-comb laser light to enter the second laser resonator via the filter.
3. The dual optical frequency comb light-emitting device according to claim 2 ,
wherein the frequency band includes a resonance frequency of the second laser resonator.
4. A dual optical frequency comb light-emitting device comprising:
a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length;
a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length; and
an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator,
wherein the first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside,
wherein the second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside, and
wherein the first laser resonator includes a pair of first mirrors and a first gain medium positioned between the pair of first mirrors.
5. The dual optical frequency comb light-emitting device according to claim 4 ,
wherein the first portion of the first optical-frequency-comb laser light is output from a first one of the pair of first mirrors, and
wherein the second portion of the first optical-frequency-comb laser light is output from a second one of the pair of first mirrors.
6. The dual optical frequency comb light-emitting device according to claim 5 ,
wherein the first one of the pair of first mirrors has higher reflectivity than the second one.
7. The dual optical frequency comb light-emitting device according to claim 4 ,
wherein the first portion and the second portion of the first optical-frequency-comb laser light are output from a first one of the pair of first mirrors.
8. The dual optical frequency comb light-emitting device according to claim 7 ,
wherein the first one of the pair of first mirrors has lower reflectivity than a second one of the pair of first mirrors.
9. The dual optical frequency comb light-emitting device according to claim 4 ,
wherein the first laser resonator further includes a first refractive-index modulator that modulates a refractive index of at least a part of an optical path between the pair of first mirrors.
10. The dual optical frequency comb light-emitting device according to claim 1 ,
wherein the second laser resonator includes a pair of second mirrors and a second gain medium positioned between the pair of second mirrors.
11. The dual optical frequency comb light-emitting device according to claim 10 ,
wherein the second laser resonator further includes a second refractive-index modulator that modulates a refractive index of at least a part of an optical path between the pair of second mirrors.
12. The dual optical frequency comb light-emitting device according to claim 1 ,
wherein the second laser resonator includes a ring resonator composed of a nonlinear optical material.
13. The dual optical frequency comb light-emitting device according to claim 1 , further comprising:
a substrate,
wherein the first optical-frequency-comb laser source, the second optical-frequency-comb laser source, and the optical coupler are integrated in a surface of the substrate.