Optical spectrometer with improved geometry and data processing for monitoring fiber optic bragg gratings
US6233373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2932
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An aspect of the present invention is an optical spectrometer for detecting a spectral signature of a input optical signal, including: (a) a collimating lens having an optical axis and focal plane, for collimating the input optical signal; (b) an input optical system, for directing the input optical signal to the collimating lens; (c) a diffraction grating, for scattering the collimated input optical signal, positioned in the path of collimated light from the collimating lens, oriented to reflect a majority of the scattered light through the collimating lens; and (d) a detector, in a focal plane of the collimating lens. Another aspect of the invention is a fiber-based sensing system using the optical spectrometer of the invention. Such a system will include (a) an optical fiber having an array of fiber Bragg gratings, where each of the gratings is reflective at a selected wavelength; (b) a light source, for radiating light at each of the selected wavelengths, optically coupled to the optical fiber; and (c) the optical spectrometer of the invention, optically coupled to the optical fiber, for detecting a spectral signature of reflected light from the fiber Bragg gratings. Typically,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.