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. 14, 2016
Filed:
May. 29, 2015
Wojtek J. Bock, Ottawa, CA;
Saurabh Mani Tripathi, Kanpur, IN;
Predrag Mikulic, Ottawa, CA;
Other;
Abstract
An optical sensor having dual resonant long period gratings (DRLPGs) separated by an inter-grating fiber spacing IGS of a length and material to provide temperature insensitivity over a wide wavelength range. The materials of the IGS and DRLPGs are such that the difference between the dn/dT of the core and the dn/dT of the cladding in the IGS is opposite in sign to that of the DRLPGs. The DRLPGs and the IGS are also composed of materials and have dimensions such that the turn-around points λ, as well as the general functional form of the respective spectral variation of their propagation constant difference Δβ versus wavelength are substantially similar.