US 12,264,984 B2
Dual-end loopback-based multi-fiber cable measurement
Jerome Laferriere, St. Etienne (FR); Andre Champavere, Saint-Bonnet les Oules (FR); and Luis Fillipe Couto De Araujo Pereira, Miramar, FL (US)
Assigned to VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed by VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed on Jul. 26, 2022, as Appl. No. 17/873,303.
Claims priority of application No. 22305388 (EP), filed on Mar. 28, 2022.
Prior Publication US 2023/0304892 A1, Sep. 28, 2023
Int. Cl. G01M 11/00 (2006.01)
CPC G01M 11/3109 (2013.01) 19 Claims
OG exemplary drawing
 
1. A dual-end loopback-based multi-fiber cable measurement apparatus comprising:
a fiber optic reflectometer; and
at least two multi-fiber loopback devices respectively connected to a near end and a far end of a multi-fiber cable to connect all fibers of the multi-fiber cable in series, the at least two multi-fiber loopback devices including:
a near-end multi-fiber loopback device connected to the fiber optic reflectometer and to the near end of the multi-fiber cable to connect together every two near-end fibers of the multi-fiber cable; and
a far-end multi-fiber loopback device connected to the far end of the multi-fiber cable to connect together every two far-end fibers of the multi-fiber cable, wherein the connections of every two near-end fibers and every two far-end fibers cause all of the fibers of the multi-fiber cable to link together in series and enable the fiber optic reflectometer to simultaneously measure all of the fibers of the multi-fiber cable.