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. 24, 1987
Filed:
Apr. 29, 1986
Vincent C So, Edmonton, CA;
Richard P Hughes, Edmonton, CA;
Paul J Vella, Edmonton, CA;
Jason B Lamont, Edmonton, CA;
Northern Telecom Limited, Montreal, CA;
Abstract
In the formation of a splice between two optical fibers, the splice loss is determined by locally supplying an optical signal to each fiber, in a direction towards the end to be spliced, and measuring the signal level at the end of the fiber before making the splice, and using a symmetric detector to measure in one of the fibers the signal level passing in one direction towards the splice and in the opposite direction after passing through the splice, the splice loss being calculated from differences between the measurements. Alternative forms of symmetric detector, which is substantially equally responsive to optical signals in either direction in a fiber, are also described.