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:
Aug. 11, 1992
Filed:
Jul. 24, 1991
Vincent C So, Ottawa, Ontario, CA;
Other;
Abstract
An OTDR includes an optical source, an optical detector, and two optical fiber connectors respectively for connection of a single mode fiber or a multi-mode fiber to be tested. Optical paths selectively couple either the source to the first connector and the first connector to the detector, or the source to the second connector and the second connector to the detector. The path from the source to the first connector consists of single-mode fiber, the path from the second connector to the detector consists of multi-mode fiber, and the paths from the first connector to the detector and from the source to the second connector each consist of single mode fiber followed by multi-mode fiber. The selective coupling is achieved using an optical switch and two optical couplers.