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:
Oct. 16, 2007
Filed:
Apr. 08, 2003
Nigel Langford, Glasgow, GB;
Geoffrey Duxbury, Glasgow, GB;
Erwan Normand, Glasgow, GB;
Cascade Technologies Limited, Glasgow, GB;
Abstract
A method apparatus for sensing gases using a semiconductor diode laser spectrometer, the method comprising: introducing a sample gas into a non-resonant optical cell (); applying a step function electrical pulse () to a semiconductor diode laser () to cause the laser () to output a continuous wavelength chirp for injecting () into the optical cell (); injecting () the wavelength chirp into the optical cell (); using the wavelength variation provided by the wavelength chirp as a wavelength scan, and detecting () light emitted from the cell (), wherein a chirp rate is selected to substantially prevent light interference occurring in the optical cell ().