Patent · US Active

Chirp modulation-based detection of chirped laser molecular dispersion spectra

US9025163B2 · kind B2 · utility

3Cited by
4References
20Claims
0Family size

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Key dates

Filing dateApr 23, 2012
Grant dateMay 5, 2015
Priority date—
Expiry dateDec 30, 2032

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N2021/451
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

An apparatus and method for detecting refractive index variations in a sample is disclosed. The apparatus includes a multi frequency laser source configured to generate a mixed laser beam having at least two optical frequencies. A sinusoidal function generator is configured to modulate the optical frequencies to generate a chirp-modulated mixed laser beam. The chirp-modulated mixed laser beam being configured to pass through the sample. A detector is configured to detect the chirp-modulated mixed beam. A signal processer is configured to process the detected chirp-modulated mixed beam to measure refractive index variations in the sample.

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