US 12,261,646 B2
Fiber cut/fault localization using digital subcarriers
Magnus Olson, Järfälla (SE); Amir Rashidinejad, Kanata (CA); and Jia Ge, San Jose, CA (US)
Assigned to Infinera Corporation, San Jose, CA (US)
Filed by Infinera Corporation, San Jose, CA (US)
Filed on Aug. 3, 2022, as Appl. No. 17/817,234.
Prior Publication US 2024/0048245 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 10/63 (2013.01); H04B 10/40 (2013.01); H04W 72/0453 (2023.01)
CPC H04B 10/63 (2013.01) [H04B 10/40 (2013.01); H04W 72/0453 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A coherent transceiver, comprising:
a coherent transmitter operable to transmit a first optical signal;
a coherent receiver comprising a processor executing processor-executable code that when executed causes the processor to:
receive a second optical signal, the second optical signal being a reflection of the first optical signal;
analyze the second optical signal to determine a first parameter indicative of a chromatic dispersion of the second optical signal; and
determine a second parameter based on the first parameter, the second parameter indicative of a distance travelled by the first optical signal and the second optical signal through one or more fiber optic link having a known first location,
wherein the coherent transmitter has a known first location, and wherein the processor-executable code when executed further causes the processor to:
determine a second location of a fault in the one or more fiber optic link by correlating the second parameter with the known first location; and
generate a message indicative of the second location.