US 12,068,779 B2
Fibre-optic measurement system, method of adaptation of the communication optical fibre into a measurement system, and fibre-optic measurement and communication system
Jakub Kaczorowski, Marki (PL); Krzystof Markiewicz, Warsaw (PL); Lukasz Szostkiewicz, Torun (PL); Alejandro Dominguez-Lopez, Granada (ES); Marek Napierala, Warsaw (PL); and Tomasz Nasilowski, Warsaw (PL)
Assigned to INPHOTECH SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA, Oltarzew (PL)
Filed by INPHOTECH SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA, Oltarzew (PL)
Filed on Dec. 23, 2021, as Appl. No. 17/561,372.
Application 17/561,372 is a continuation in part of application No. PCT/IB2020/056069, filed on Jun. 26, 2020.
Prior Publication US 2022/0123835 A1, Apr. 21, 2022
Int. Cl. H04B 10/079 (2013.01); H04B 10/25 (2013.01)
CPC H04B 10/07957 (2013.01) [H04B 10/07953 (2013.01); H04B 10/25 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fibre-optic measurement system, comprising:
a controlled light generation system coupled via a first optical path to an input of a directional device;
a receiving system connected via a second optical path to an output of the directional device;
a processing unit for receiving and processing a signal from the receiving system and for implementing an OFDR and/or COTDR measurement technique for measuring changes in an optical distance and processing them into at least one parameter;
a selective mode device for single mode detection of backscattered light coupled via a third optical path to the directional device;
wherein the first optical path, second optical path, and third optical path are all single mode fibres;
wherein the selective mode device is configured to be connected to a multi-mode fiber of a fibre-optic infrastructure; and
wherein the processing unit is configured to control the controlled light generation system, and the selective mode device is configured to selective excitation of a single mode in the multi-mode fibre of the fibre-optic infrastructure to determine an optical distance of the multi-mode fibre.