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:
Feb. 17, 2026
Filed:
Apr. 28, 2022
Optasense Holdings Limited, Surrey, GB;
Roger Crickmore, Farnborough, GB;
Optasense Holdings Limited, Surrey, GB;
Abstract
This application relates to methods and apparatus for distributed fibre optic sensing. A sensing apparatus includes an optical arrangement which repeatedly interrogates a sensing optical fibre by launching coherent interrogating optical radiation into the sensing optical fibre. A detector detects Rayleigh backscatter from within the sensing fibre and a processor processes the detected backscatter to determine a measurement signal for each of a plurality of channels of the sensing optical fibre. The wavelength of the coherent interrogating optical radiation is modulated so as to vary between successive interrogations according to a modulation characteristic. The processor is operable to identify, for a given channel, an induced signal component corresponding to the modulation characteristic and determine an amplitude of the induced signal component so as to determine a compensation to be applied to the measurement signal for that channel to compensate for any variation in effective gauge length.