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:
Sep. 17, 2002
Filed:
Sep. 30, 2000
James S. Sirkis, Wallingford, CT (US);
CiDRA Corporation, Wallingford, CT (US);
Abstract
An athermal grating design has a Bragg grating unit and a lever arrangement. In operation, the Bragg grating unit responds to an optical signal, a change of temperature and a lever force for offsetting thermally-induced changes in the Bragg grating unit, for providing a grating signal that does not change in relation to change of temperature. The lever arrangement responds to a change of temperature, for providing the level force to the grating to compensate for the change in the temperature. The Bragg grating unit includes a large diameter waveguide cane structure. The lever arrangement may include a top plate, a bottom plate, a lever arm pivotally coupled between the top plate and the bottom plate, and a rod coupled between the top plate and the bottom plate on one side of the lever arm. The Bragg grating unit is arranged between the top plate and the bottom plate on another side of the lever arm. The level arm and the rod have different coefficients of expansion.