The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2007
Filed:
May. 05, 2004
Stefan Lundqvist, Askim, SE;
Per-arne Thorsén, Öjersjö, SE;
Stefan Lundqvist, Askim, SE;
Per-Arne Thorsén, Öjersjö, SE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a wavelength modulation spectroscopy method and system the wavelength of a light source is modulated with a frequency f. The light of the light source is passed to a sample for interacting and thereafter detected and demodulated at a higher harmonic Nf. To suppress non-linearities in the modulation of the wavelength of the light source a portion of the light () of the light source () is passed to a monitor detector (). The monitor detector output is demodulated at said higher harmonic Nf, and the modulation of the light source () is predistorted at said higher harmonic Nfin dependence on said demodulated monitor detector output.