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:
Jun. 02, 1992
Filed:
Feb. 04, 1991
Applicant:
Inventor:
James D Farina, Tolland, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250205 ; 21912165 ;
Abstract
The present invention can be utilized for altering the optical characteristics (e.g. refractive index) of selected regions of planar and channel waveguide structures fabricated by the Proton Exchange (PE) process from materials such as LiNbO.sub.3 or LiTaO.sub.3. The present invention employs localized surface heating from the absorption of optical radiation in an annealing process. Simultaneous alteration and monitoring of the optical characteristics of optical waveguide structures in these integrated optical devices is also provided, thereby allowing closed loop or active trimming of waveguide parameters