Patent · US Expired

Refractometer with blazed bragg gratings

US7184135B2 · kind B2 · utility

4Cited by

7References

11Claims

0Family size

Assignee

COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

Guillaume Laffont · Meudon, FR
Pierre Ferdinand · Houilles, FR

Key dates

Filing date	Oct 2, 2001
Grant date	Feb 27, 2007
Priority date	—
Expiry date	Mar 2, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/02195
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A refractometer with blazed Bragg gratings. In order to measure the refractive index of a medium, for example a liquid or a gas, the refractometer includes a waveguide having a blazed Bragg grating, the spectral response of which depends on the refractive index of the medium and a light source in order to make this light interact with the grating. Further, spectral analysis of the light which has interacted with the grating is performed, the spectrum provided by the spectral analysis is recovered, and, from the recovered spectrum, the spectral response of the grating is correlated with one value of the refractive index of the medium.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.