Spectroscopic apparatus using spectrum narrowed and stabilized laser with Bragg grating
US7245369B2 · kind B2 · utility
33Cited by
10References
48Claims
0Family size
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Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jun 23, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4012
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring properties of physical matters by means of Raman spectroscopy including a laser element, a wavelength dispersion element, an array or single element detector, and a control and data processing unit. The laser element, which is used to excite Raman scattering, is spectrum narrowed and stabilized by attachment of a Bragg grating device. The grating can be either a volume Bragg grating (VBG) written inside a glass substrate or a fiber Bragg grating (FBG) written inside an optical fiber. A laser element can be provided with a wavelength modulation capability for fluorescence background suppression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.