Method and system for multiple resonance interferometer
A multiple resonance interferometer structure includes an input port and a first arm coupled to the input port and including a first resonant structure. The multiple resonance interferometer also includes a second arm coupled to the input port and including a second resonant structure and an output port coupled to the first arm and the second arm.
1. A method of modulating a signal, the method comprising:
receiving an optical signal at an input port;
splitting the optical signal into a first arm signal and a second arm signal;
adjusting a DC bias phase of the first arm signal or the second arm signal using a first phase control element;
introducing a first predetermined phase delay in the first arm signal using a first resonance structure, wherein:
the first predetermined phase delay is equal to +/−φ;
the first predetermined phase delay is introduced using a second phase control element; and
the first resonance structure is a ring structure;
introducing a second predetermined phase delay in the second arm signal using a second resonance structure, wherein:
the second predetermined phase delay is equal to −/+φ;
the second predetermined phase delay is introduced using a third phase control element; and
the second resonant structure is a ring structure;
combining the phase delayed first arm signal and the phase delayed second arm signal to provide a modulated signal; and
transmitting the modulated signal at an output port.
2. The method of claim 1 , wherein the first phase control element is added to the first resonant structure.
3. The method of claim 1 wherein splitting the optical signal comprises passing the optical signal through a Y-branch optical coupler.
4. The method of claim 1 wherein introducing the first predetermined phase delay comprises coupling the first arm signal into a first resonant structure and introducing the second predetermined phase delay comprises coupling the second arm signal into a second resonant structure.
5. The method of claim 4 wherein the first phase control element is a thermal phase control element and the second phase control element is a diode.
6. The method of claim 1 wherein introducing the first predetermined phase delay comprises coupling the first arm signal into a first resonant cavity and introducing the second predetermined phase delay comprises coupling the second arm signal into a second resonant cavity.
7. A method of modulating a signal, the method comprising:
receiving an optical signal at an input port;
splitting the optical signal into a first arm signal and a second arm signal;
adjusting a DC bias phase of the first arm signal or the second arm signal using a first phase control element;
introducing a first predetermined phase delay in the first arm signal using a first resonance structure, wherein:
introducing the first predetermined phase delay in the first arm signal comprises differentially driving the first predetermined phase delay by +φ and −ψ;
the first predetermined phase delay is introduced using a second phase control element; and
the first resonance structure is a ring structure;
introducing a second predetermined phase delay in the second arm signal using a second resonance structure, wherein:
introducing the second predetermined phase delay in the second arm signal comprises differentially driving the second predetermined phase delay by −ψ and +φ;
the second predetermined phase delay is introduced using a third phase control element; and
the second resonant structure is a ring structure;
combining the phase delayed first arm signal and the phase delayed second arm signal to provide a modulated signal; and
transmitting the modulated signal at an output port.
8. A method of modulating a signal, the method comprising:
receiving an optical signal at an input port;
splitting the optical signal into a first arm signal and a second arm signal;
adjusting a DC bias phase of the first arm signal or the second arm signal using a first phase control element;
introducing a first predetermined phase delay in the first arm signal using a first resonance structure, wherein:
introducing the first predetermined phase delay in the first arm signal comprises differentially driving the phase delay by equal to Nπ+/−φ:
the first predetermined phase delay is introduced using a second phase control element; and
the first resonance structure is a ring structure;
introducing a second predetermined phase delay in the second arm signal using a second resonance structure, wherein:
introducing the second predetermined phase delay in the second arm signal comprises differentially driving the phase delay by (1+N)π−/+φ;
the second predetermined phase delay is introduced using a third phase control element; and
the second resonant structure is a ring structure;
combining the phase delayed first arm signal and the phase delayed second arm signal to provide a modulated signal; and
transmitting the modulated signal at an output port.
9. The method of claim 1 wherein the first predetermined phase delay is associated with a first 3 dB point of a transmission function.
10. The method of claim 9 wherein the first 3 dB point is on a first side of a transmission resonance.
11. The method of claim 10 wherein the second predetermined phase delay is associated with a second 3 dB point of the transmission function on a second side of the transmission resonance.
12. The method of claim 7 , wherein the first phase control element is added to the second resonant structure.
13. The method of claim 7 wherein splitting the optical signal comprises passing the optical signal through a Y-branch optical coupler.
14. The method of claim 7 wherein introducing the first predetermined phase delay comprises coupling the first arm signal into a first resonant structure and introducing the second predetermined phase delay comprises coupling the second arm signal into a second resonant structure.
15. The method of claim 14 wherein the first resonant structure comprises a first resonant ring and the second resonant structure comprises a second resonant ring.
16. The method of claim 7 wherein introducing the first predetermined phase delay comprises coupling the first arm signal into a first resonant cavity and introducing the second predetermined phase delay comprises coupling the second arm signal into a second resonant cavity.
17. The method of claim 7 wherein the first predetermined phase delay is associated with a first 3 dB point of a transmission function.
18. The method of claim 17 wherein the first 3 dB point is on a first side of a transmission resonance.
19. The method of claim 18 wherein the second predetermined phase delay is associated with a second 3 dB point of the transmission function on a second side of the transmission resonance.
20. The method of claim 8 , wherein the first phase control element is added to the first resonant structure.