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:
Aug. 28, 2001
Filed:
Apr. 07, 1999
Applicant:
Inventors:
Wilbur Dexter Johnston, Jr., Mendham Township, Morris County, NJ (US);
William James Minford, Lehigh Township, Northampton County, PA (US);
John William Osenbach, Kutztown, PA (US);
Assignee:
Agere Systems Optoelectronics Guardian Corp., Orlando, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 1/00 ; G02B 6/10 ; B29D 1/100 ;
U.S. Cl.
CPC ...
G02B 1/00 ; G02B 6/10 ; B29D 1/100 ;
Abstract
The invention is an optical waveguide device and a method for forming the device which provides enhanced stability. The device includes a pyroelectric substrate such as lithium niobate where the bulk resistivity of at least a portion of the substrate is reduced to 10,ohm cm or less by heating the substrate in a reducing atmosphere. This causes the substrate to be less susceptible to temperature variants which can otherwise result in dc bias drift and variation.