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. 23, 2004
Filed:
Jan. 24, 2002
Ian J. Murgatroyd, Birmingham, GB;
Catherine A. Sugden, Birmingham, GB;
Abstract
An optical spectrum analyzer ( ), receiving a multi-channel optical signal ( ). The optical signal ( ) is passed through an optical isolator ( ) and a fiber coupler ( ) to a tunable optical filter. The tunable optical filter comprises one or more fiber Bragg gratings ( ) inscribed in a length of optical fiber. The optical fiber is mounted on a means operable to apply a variable strain to the fiber, to they tune the peak wavelength of the Bragg grating ( ) over a desired wavelength range, the tunable optical filter thereby reflecting each channel of the input signal ( ) in turn. The detector ( ) therefore detects a signal only if the input signal ( ) contains wavelengths corresponding to the reflection wavelength of a grating ( ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile