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:
Jan. 09, 1996
Filed:
May. 11, 1994
Bernadette Johnson, Hollis, NH (US);
John J Zayhowski, Pepperell, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A sensing system for high sensitivity spectroscopic measurements is described. An optically pumped passively Q-switched laser emits laser light of a first frequency at a sensing site. Frequency-converting crystals coupled to the laser convert the laser output to light of a second frequency which illuminates the sensing site and produces a return radiation that is characteristic of the material at the site. A pump source coupled to the laser by an optical fiber pumps the laser with light of a third frequency that is efficiently propagated over the fiber. A sensor senses the radiation returning from the sensing site. The sensor is either an optical detector located at the site or an optical fiber having one end located at the site and the other end coupled to a remote optical detector.