Patent · US Active

Dual-etalon cavity ring-down frequency-comb spectroscopy with broad band light source

US8693004B2 · kind B2 · utility

8Cited by
4References
21Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 17, 2011
Grant dateApr 8, 2014
Priority date—
Expiry dateNov 1, 2032

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N21/45
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

In an embodiment, a dual-etalon cavity-ring-down frequency-comb spectrometer system is described. A broad band light source is split into two beams. One beam travels through a first etalon and a sample under test, while the other beam travels through a second etalon, and the two beams are recombined onto a single detector. If the free spectral ranges (“FSR”) of the two etalons are not identical, the interference pattern at the detector will consist of a series of beat frequencies. By monitoring these beat frequencies, optical frequencies where light is absorbed may be determined.

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