US 11,703,397 B2
Optical fiber identification and distance measurement
Andre Champavere, Saint-Bonnet les Oules (FR)
Assigned to Viavi Solutions France SAS, Plaisir (FR)
Filed by Viavi Solutions France SAS, Plaisir (FR)
Filed on Nov. 21, 2019, as Appl. No. 16/691,262.
Claims priority of application No. 19306401 (EP), filed on Oct. 28, 2019.
Prior Publication US 2021/0123817 A1, Apr. 29, 2021
Int. Cl. G01K 11/32 (2021.01); G01D 5/353 (2006.01); G01M 11/00 (2006.01); G01K 11/324 (2021.01)
CPC G01K 11/32 (2013.01) [G01D 5/35361 (2013.01); G01D 5/35364 (2013.01); G01M 11/3154 (2013.01); G01K 11/324 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a reflectometer and optical fiber connection device comprising:
a Rayleigh wavelength pass filter to pass, in one direction, a Rayleigh signal of an optical reflectometer signal to an optical fiber; and
a Raman wavelength pass filter to:
filter out, in another direction, Rayleigh backscattering from the optical reflectometer signal; and
pass, in the another direction, a Raman Anti-Stokes signal from the optical fiber,
wherein the Raman wavelength pass filter is different from the Rayleigh wavelength pass filter.