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:
Nov. 14, 2000
Filed:
Feb. 13, 1998
Paul Joseph Lemaire, Madison, NJ (US);
Lloyd Shepherd, Madison, NJ (US);
John David Weld, Succasunna, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A compact temperature compensating device for an optical fiber grating includes an inner expansion member disposed concentrically within and in a substantially parallel relationship with an outer expansion member. The outer expansion member has a coefficient of thermal expansion greater than that of the inner expansion member. The device further includes a base member and a pivoting lever. The base member is fixedly attached to a distal end of the outer and inner expansion members and to a distal end of the fiber grating disposed concentrically within the inner expansion member. The lever is connected to a proximal end of the inner and outer expansion members and to a proximal end of the fiber grating through joints that are flexurally deformable so that, as the expansion members expand and contract differentially within an expected temperature range, the lever pivots about the inner expansion member and imparts a desired amount of axial strain in the fiber grating to maintain the grating wavelength substantially constant.