Bias control circuit and bias control method
US-10823989-B2 · Nov 3, 2020 · US
Control of dual phase tuners
US11061260B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11061260-B2 |
| Application number | US-201916238191-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 2, 2019 |
| Priority date | Jan 2, 2019 |
| Publication date | Jul 13, 2021 |
| Grant date | Jul 13, 2021 |
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Abstract
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Techniques that facilitate control of dual phase tuners are provided. In one example, a system includes a first phase tuner and a second phase tuner. The first phase tuner is driven to a first phase bias that is different than a desired phase bias for an interferometer. The second phase tuner is driven to a second phase bias. A combination of the first phase bias and the second phase bias corresponds to the desired phase bias.
First claim
Opening claim text (preview).
What is claimed is: 1. A system, comprising: a first phase tuner that is driven to a first phase bias that is different than a defined phase bias for an interferometer; and a second phase tuner that is driven to a second phase bias, wherein a combination of the first phase bias and the second phase bias corresponds to the defined phase bias, wherein the first phase tuner is driven to a third phase bias equal to zero in response to a determination that a phase shift value associated with the first phase tuner is above 180 degrees, and wherein the first phase tuner is driven to the third phase bias after the first phase tuner is driven to the first phase bias. 2. The system of claim 1 , wherein the first phase tuner is coupled to a first digital-to-analog converter that comprises a first resolution associated with the first phase bias. 3. The system of claim 2 , wherein the second phase tuner is coupled to a second digital-to-analog converter that comprises a second resolution associated with the second phase bias, and wherein the second resolution is higher than the first resolution. 4. The system of claim 3 , wherein the first digital-to-analog converter and the second digital-to-analog converter comprise a corresponding structure. 5. The system of claim 1 , wherein the first phase tuner is located in a first arm of the interferometer and the second phase tuner is located in a second arm of the interferometer. 6. The system of claim 1 , wherein the second phase tuner is driven to the second phase bias in response to a determination that a phase shift value associated with the first phase tuner is below 180 degrees. 7. The system of claim 1 , wherein the second phase tuner is driven to a fourth phase bias in response to a determination that the first phase tuner is driven to the third phase bias. 8. The system of claim 7 , wherein the first phase tuner is driven to a fifth phase bias in response to a determination that the second phase tuner is driven to the fourth phase bias. 9. The system of claim 1 , wherein the first phase tuner is a first thermo-optic phase shifter, and wherein the second phase tuner is a second thermo-optic phase shifter. 10. The system of claim 1 , wherein the interferometer is a Mach Zehnder interferometer, a ring resonator enhanced Mach Zehnder interferometer, or a Michelson interferometer. 11. The system of claim 1 , wherein the first phase tuner and the second phase tuner facilitate reduced power consumption for the interferometer.
Assignees
Inventors
Classifications
- G02F1/0147Primary
based on thermo-optic effects (G02F1/132 takes precedence) · CPC title
Phase-only modulation · CPC title
Mach-Zehnder type · CPC title
Michelson type · CPC title
Operation of devices; Circuit arrangements, not otherwise provided for in this subclass · CPC title
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- What does patent US11061260B2 cover?
- Techniques that facilitate control of dual phase tuners are provided. In one example, a system includes a first phase tuner and a second phase tuner. The first phase tuner is driven to a first phase bias that is different than a desired phase bias for an interferometer. The second phase tuner is driven to a second phase bias. A combination of the first phase bias and the second phase bias corre…
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification G02F1/0147. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 13 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).