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:
Jul. 12, 2005
Filed:
May. 31, 2001
Ian John Murgatroyd, Birmingham, GB;
Catherine Anne Sugden, Birmingham, GB;
Karen Elizabeth Chisholm, Birmingham, GB;
Ian John Murgatroyd, Birmingham, GB;
Catherine Anne Sugden, Birmingham, GB;
Karen Elizabeth Chisholm, Birmingham, GB;
Aston University, Birmingham, GB;
Abstract
Apparatus () for interrogating an optical signal (not shown) propagating in an optical waveguide, such as an optical fiber, having an input section () and a second section () through which light entering from the input section () will subsequently propagate. The second section () includes a grating portion, such as a tilted chirped fiber Bragg grating (). The grating () causes at least part of the optical signal to be coupled out of the optical fiber, through the fiber cladding. A photodetector () is provided generally alongside the grating (). The photodetector () is arranged to collect and detect substantially all of the outcoupled optical signal. The relationship between the optical power outcoupled by the grating () and the wavelength of the optical signal is known, allowing a measurement of the outcoupled optical power to be used to determine the wavelength of the optical signal propagating through the grating ().