US 11,942,986 B2
Optical time-domain reflectometer (OTDR) including channel checker
Vincent Lecoeuche, Tarentaise (FR)
Assigned to VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed by VIAVI SOLUTIONS INC., San Jose, CA (US)
Filed on May 4, 2022, as Appl. No. 17/736,273.
Claims priority of application No. 21306326 (EP), filed on Sep. 24, 2021.
Prior Publication US 2023/0100473 A1, Mar. 30, 2023
Int. Cl. H04B 10/07 (2013.01); H04B 10/071 (2013.01); H04B 10/2537 (2013.01); H04B 10/50 (2013.01); G01M 11/00 (2006.01)
CPC H04B 10/071 (2013.01) [H04B 10/2537 (2013.01); H04B 10/503 (2013.01); G01M 11/3109 (2013.01); H04B 10/07 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A channel checker optical time-domain reflectometer (OTDR) comprising:
a laser source to emit a laser beam;
an optical switch that is optically connected to the laser source to receive the laser beam and to selectively transmit the laser beam to a circulator that is optically connected to a device under test (DUT);
a first coupler that is optically connected to a first photodiode and to the circulator; and
a second coupler that is directly optically connected to the first coupler, the optical switch, and a second photodiode.