System and method for optical strain measurement
US12196630B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 24, 2020 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Apr 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/06754
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position dependent strain measurement system detected strain as a function of position in an optical sensing fiber using an interferometer having an input coupled to the first end of the optical sensing fiber. An electronic phase measuring sub-system is coupled to an output of the interferometer. The electronic phase measuring sub-system defines a usable optical intensity range of input light of the interferometer, wherein the electronic phase measuring sub-system is capable of measuring the phase of the input light. An optically pumped optical fiber amplifier is coupled between the first end of the optical sensing fiber and the input of the interferometer in series with an electrically pumped semi-conductor optical amplifier. The electrically pumped semi-conductor optical amplifier having a non-linear intensity amplification range that overlaps with the usable optical intensity range. The optically pumped optical fiber amplifier is configured to amplify an intensity of backscattered light from the optical sensing fiber into the non-linear intensity amplification range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.