Patent · US Active

Method and device for determining the latency or length of an optical path, especially an optical fiber, of a fiber-optic transmission link

US10498439B2 · kind B2 · utility

1Cited by

0References

20Claims

0Family size

Assignee

ADVA Optical Networking SE · DE

Inventors

Pawel Brzozowski · Atlanta, US
Andreas Färbert · Munich, DE
Maciej Lipski · Gdynia, PL

Key dates

Filing date	May 30, 2018
Grant date	Dec 3, 2019
Priority date	—
Expiry date	May 30, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH04Q2011/0073
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A method for determining the latency or length of an optical path of a fiber-optic transmission link includes: starting a measurement cycle at a first point in time; stopping the measurement cycle at a second point in time after having received a last measurement bit or bit pattern at the first end; determining, at the first end, the total round-trip delay of the optical path by evaluating a time information available at the first end; and calculating the length of the optical path by using the total round-trip delay and the group velocity characterizing the signal propagation along the optical path.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.