Large scale high speed multiplexed optical fiber sensor network
US6492636B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Jan 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0294
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digital spatial and wavelength domain system for multiplexing fiber Bragg grating sensors comprises: a plurality of optical fibers, each including a plurality of fiber Bragg gratings therein, each fiber Bragg grating having a selective center wavelength that is variable in accordance with strain for reflecting or transmitting light at the corresponding center wavelength in accordance with the strain thereat; means for providing broad band illumination (110) for the fiber Bragg gratings; means for each optical fiber for carrying the light to a selected location; and a wavelength dispersion device (136) responsive to the light from each of the fibers for wavelength separating the light in each fiber into the center wavelengths in accordance with the location of each fiber so that the selected location of each fiber and the wavelength separated light provides spatially independent signals for each fiber Bragg grating in each optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.