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:
Jan. 10, 1995
Filed:
Feb. 01, 1993
Carl M Ferrar, East Hartford, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A simultaneous data communication and fiber perturbation detection system includes a narrow band optical data signal from a source 10 which is polarized by a polarizer 14 along a slow polarization axis of a polarization preserving birefringent optical fiber 28, and a broadband probe optical signal from a source 20 which is polarized along a fast polarization axis of the fiber 28. A perturbation 32 in the fiber 28 causes a portion of the probe signal to be coupled onto the orthogonal slow polarization. At the receiving end of the fiber 28, a beamsplitter 34 splits the signal along a path 36 which extracts the data signal to be received by a data receiver 44, and a path 38 which extracts the probe signal and employs an adjustable interferometer 58 to determine the location along the fiber 28 where the perturbation 32 exists. The central wavelengths .lambda.1,.lambda.2 of the data and probe optical signals may be the same or different.