Patents
US 12529623 B2: Method for determining distributed birefringence variations in a polarization-maintaining optical fiber
- Granted
- 2026-01-20
- Filed
- 2023-07-31 application 18362145
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
System and method for determining distributed birefringence variations in a polarization-maintaining optical fiber (PM fiber). The method includes causing a pump signal to be sent into the PM fiber to generate a Brillouin dynamic grating (BDG) therein, causing a first chirped probe optical pulse to be sent into the PM fiber, receiving a first reflected signal, the first reflected signal being a first portion of the first chirped probe optical pulse reflected by the BDG, receiving a second reflected signal, the second reflected signal being a second portion of the first chirped probe optical pulse reflected by the BDG, and determining a variation of birefringence of the PM fiber indicative of a variation of physical disturbance of the PM fiber between times of reflections on the BDG of the first and second reflected signals.
Source: PTBLXML, file of 2026-01-20 (ipgb20260120.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| HUAWEI TECHNOLOGIES CANADA CO., LTD. 115 patents | Foreign company or organization | Kanata, CA | PTBLXML, file of 2026-01-20 | |
| 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 | PTBLXML, file of 2026-01-20 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Xiaoyi Bao | Ottawa, CA | 9 | PTBLXML, file of 2026-01-20 | |
| Yuan Wang | Ottawa, CA | PTBLXML, file of 2026-01-20 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01M | Testing static or dynamic balance of machines or structures; testing of structures or apparatus, not otherwise provided for | G01M11/37 | PTBLXML, file of 2026-01-20 |
| G01K | Measuring temperature; measuring quantity of heat; thermally-sensitive elements not otherwise provided for | G01K11/322 | PTBLXML, file of 2026-01-20 |
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N2021/638 | PTBLXML, file of 2026-01-20 |
| G02B | Optical elements, systems or apparatus | G02B6/02109 | PTBLXML, file of 2026-01-20 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
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.