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:
Feb. 05, 1980
Filed:
Apr. 20, 1978
Gary C Bjorklund, West Windsor, NJ (US);
Ralph H Storz, Freehold, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
An apparatus is disclosed for servo-locking the angular orientation of a nonlinear crystal to the angle at which phasematching occurs for nonlinear optical frequency mixing processes. Two secondary beams are generated from a beam of radiation which is incident upon the crystal. They travel through the crystal at small angles with respect to the main beam and each generates a secondary output beam containing new frequency components produced by the nonlinear optical frequency mixing process in the crystal. A discrimination signal is created by subtracting the generated power at the new frequency component of one of the secondary output beams from the generated power of the other. This signal is sensitive to the angular misalignment of the crystal and is used to drive a servo system to maintain the proper angular orientation for phasematching.