Patent · US Active

Optical link and coherent receiver noise characterization

US11489590B1 · kind B1 · utility

2Cited by

15References

20Claims

0Family size

Assignee

Cisco Technology, Inc. · US

Inventors

Jörg Leykauf · Heroldsbach, DE
Sonja Schneider · Lehrberg, DE
Israa Slim · Munich, DE
Yi Tang · San Diego, US

Key dates

Filing date	May 10, 2021
Grant date	Nov 1, 2022
Priority date	—
Expiry date	May 10, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04B10/616
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Optical signal to noise ratios that more accurately characterize optical link noise are determined. As noise induced by an optical receiver does not generally vary with an input optical signal power, a power of an incoming optical signal is varied at the receiver. A resulting variation in noise measure represents a variation in link noise and does not include any variation caused by receiver noise, as receiver noise does not generally vary with optical signal power. Thus, the contribution of optical link noise can be discerned from other noise induced by the receiver itself. A more accurate characterization of optical link performance is thus provided.

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