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:
Apr. 01, 1997
Filed:
Dec. 04, 1995
Theodore D Fay, Mission Viejo, CA (US);
PHI, Applied Physical Sciences International, Mission Viejo, CA (US);
Abstract
A compact laser diode monitor for measuring concentrations of individual atomic and molecular species in both gaseous and semitransparent fluids, includes a first diode laser having an output for resonantly exciting a first selected electronic transition of a specific atomic or molecular species of a sample, and a second diode laser having an output for resonantly exciting a second selected electronic transition of said specific atomic or molecular species of said sample. A difference between said first and second frequency outputs is equal to a vibrational energy level difference of the specific atomic or molecular species. Further said first and second frequency outputs are simultaneously directed into said sample, with selected momentum vectors in order to cause the selected atomic or molecular species to emit a coherent photon signal in a selected direction having a frequency equal to twice the first frequency output minus the second frequency output. A detector is provided for receiving the emitted coherent photon signal and spectrally analyzing the emitted coherent photon signal.