Dual modulation laser line-locking technique for wavelength modulation spectroscopy
US6351309B1 · kind B1 · utility
18Cited by
16References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1994 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/39
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are a method and apparatus for dual modulation of an optical spectroscopy laser. Demodulation is accomplished in a manner resulting in measurement of absorbance of a gas species, as well as stabilization of laser wavelength and baseline noise reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.