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:
Sep. 19, 2000
Filed:
Jun. 19, 1998
Applicant:
Inventors:
Olivier Gautheron, Voisin le Bretonneux, FR;
Vincent Letellier, Paris, FR;
Assignee:
Alcatel, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356 731 ; 385 24 ;
Abstract
A process for locating a fault on an optical transmission link using a coherent detection reflectometer at a terminal sends over the transmission link measuring pulses and a loading signal interleaved between the measuring pulses. The loading signal is chosen to have the same optical wavelength as the measuring pulses with which it is combined and an extended bandwidth such that the power that it develops in the narrow measuring band of the reflectometer is negligible compared to that developed by the measuring pulses.