Patents
US 12313470 B2: Method and apparatus for operating optical wavemeter and wavemeter comprising same
- Granted
- 2025-05-27
- Filed
- 2021-12-23 application 17560901
- Type
- Utility · 22 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
There is provided a method, apparatus and system for calibrating and operating an optical wavemeter. In calibration, training optical signals with known wavelengths are input to a wavemeter, and corresponding photodetector measurements are obtained. Optical parameters of the wavemeter are then estimated based on the measurements. The optical parameters are indicative of a length difference ΔL between two unequal-length waveguides in an optical delay line of the wavemeter; and scattering parameters of a multi-mode interferometer (MMI) coupler of the wavemeter. The estimation process involves a (e.g. golden-section) search to determine one or more output values for at least one of the optical parameters, based on an objective function which indicates a difference expected and actual measurements. The expected measurements are generated based on a numerical model incorporating candidate values for the optical parameters.
Source: PVGPATDIS, file of 2026-04-10 (ipg250527.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| HUAWEI TECHNOLOGIES CANADA CO., LTD. 115 patents | Foreign company or organization | Carp, CA | PVGPATDIS, file of 2026-04-10 | |
| University of Ottawa 100 patents | Foreign company or organization | Ottawa, CA | University of Ottawa College or university EXACT medium confidence: identical full name, one of each nationally UNIVERSITY OF OTTAWA Nonprofit EXACT medium confidence: identical full name, one of each nationally | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Trevor Hall | Manotick, CA | 8 | PVGPATDIS, file of 2026-04-10 | |
| Mohammad Mehdi Mansouri Rad | Carp, CA | 25 | PVGPATDIS, file of 2026-04-10 | |
| Gazi Mahamud Hasan | Ottawa, CA | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01J | Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light; colorimetry; radiation pyrometry | G01J9/0246 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2022-01-12 | Assignment Assignment of assignor's interest | HALL, TREVOR JAMES signed 2022-01-01 HASAN, GAZI MAHAMUD signed 2022-01-10 | THE UNIVERSITY OF OTTAWA OTTAWA | 58633/132 | ECORSEXC, file of 2026-09-25 |
| 2022-01-12 | Assignment Assignment of assignor's interest | MANSOURI RAD, MOHAMMAD MEHDI signed 2021-12-24 | HUAWEI TECHNOLOGIES CANADA CO., LTD. KANATA | 58632/938 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.