US 12,270,723 B2
Fiber optic cable location system and method
Andre Champavere, Saint-Bonnet les Oules (FR)
Assigned to VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed by Viavi Solutions France SAS, Plaisir (FR)
Filed on Nov. 3, 2023, as Appl. No. 18/501,442.
Application 18/501,442 is a continuation of application No. 17/513,649, filed on Oct. 28, 2021, granted, now 11,846,563.
Application 17/513,649 is a continuation of application No. 16/388,536, filed on Apr. 18, 2019, granted, now 11,187,617, issued on Nov. 30, 2021.
Claims priority of application No. 19305402 (EP), filed on Mar. 28, 2019.
Prior Publication US 2024/0060852 A1, Feb. 22, 2024
Int. Cl. G01M 11/00 (2006.01); G01D 5/353 (2006.01); G01H 9/00 (2006.01); G01V 1/22 (2006.01); G02B 6/46 (2006.01)
CPC G01M 11/3145 (2013.01) [G01D 5/35361 (2013.01); G01H 9/004 (2013.01); G01M 11/3109 (2013.01); G01M 11/3154 (2013.01); G01V 1/226 (2013.01); G02B 6/562 (2023.05)] 20 Claims
OG exemplary drawing
 
1. A fiber optic cable location system, comprising:
a mobile signal generator configured to:
generate a plurality of vibrational signals directed towards an area where a location of a section of a fiber optic cable is to be determined;
receive an indication of noise variation over time of intensity of reflected light resulting from a coherent laser pulse transmitted into the fiber optic cable and caused by the generated plurality of vibrational signals directed towards the area where the location of the section of the fiber optic cable is to be determined,
wherein the noise variation over time is determined based on a sampling of the reflected light at a sampling frequency, and the sampling frequency depends on a length of the fiber optic cable; and
determine, based on the indication of noise variation over time of intensity of reflected light, the location of the section of the fiber optic cable to be determined.