Orthogonal-mode laser gyroscope
US-2017307375-A1 · Oct 26, 2017 · US
Rotation sensor, rotation sensing method, and applications
US10415970B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10415970-B2 |
| Application number | US-201715799027-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 31, 2017 |
| Priority date | Nov 1, 2016 |
| Publication date | Sep 17, 2019 |
| Grant date | Sep 17, 2019 |
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Abstract
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A chip-scale ultrasensitive ring laser gyroscope that utilizes the physics of exceptional points. By exploiting the properties of such non-Hermitian degeneracies, the rotation-induced frequency splitting becomes proportional to the square root of the gyration speed (Ω 1/2 ), thus enhancing the sensitivity to low angular rotations by orders of magnitudes. At its maximum sensitivity limit, the measurable spectral splitting is independent of the radius of the cavity rings involved. Binary and ternary systems and associated methods are described.
First claim
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We claim: 1. A chip-scale parity-time (PT) symmetric optical rotation motion sensor, comprising: a semiconductor substrate including at least two coupled ring resonators of radius R having a coupling strength κ for exchanging energy; and a bus waveguide that is disposed on the semiconductor substrate operationally adjacent to either of the ring resonators for directing a lasing emission received from the ring resonators to a photodetector. 2. The chip-scale parity-time (PT) symmetric optical rotation motion sensor of claim 1 , wherein the ring resonators are coupled side-by-side. 3. The chip-scale parity-time (PT) symmetric optical rotation motion sensor of claim 1 , wherein the ring resonators are coupled vertically above/below the other, and the cross-section of the ring resonators is designed so as to support only the fundamental TE mode. 4. The chip-scale parity-time (PT) symmetric optical rotation motion sensor of claim 1 , wherein the ring resonators include an s-bend bypass to provide unidirectional light propagation. 5. The chip-scale parity-time (PT) symmetric optical rotation motion sensor of claim 1 , further comprising a heater operationally coupled to the ring resonators. 6. The chip-scale parity-time (PT) symmetric optical rotation motion sensor of claim 1 , wherein the photodetector comprises a photodiode disposed on the semiconductor substrate.
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Classifications
- G01C19/66Primary
Ring laser gyrometers · CPC title
- G01C19/722Primary
of the mechanical construction · CPC title
using a passive ring resonator · CPC title
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- What does patent US10415970B2 cover?
- A chip-scale ultrasensitive ring laser gyroscope that utilizes the physics of exceptional points. By exploiting the properties of such non-Hermitian degeneracies, the rotation-induced frequency splitting becomes proportional to the square root of the gyration speed (Ω 1/2 ), thus enhancing the sensitivity to low angular rotations by orders of magnitudes. At its maximum sensitivity limit, the me…
- Who is the assignee on this patent?
- Univ Central Florida Res Found Inc
- What technology area does this patent fall under?
- Primary CPC classification G01C19/66. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 17 2019 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).