Patent · US Active

Optical communication reception system

US8649690B2 · kind B2 · utility

17Cited by

2References

20Claims

0Family size

Assignee

Cisco Technology, Inc. · US

Inventors

Soren Gehrke · Nuremberg, DE
Theodor Kupfer · Feucht, DE
James Whiteaway · Sawbridgeworth, GB

Key dates

Filing date	May 30, 2012
Grant date	Feb 11, 2014
Priority date	—
Expiry date	Jun 10, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04B10/61
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A system configured to maintain a consistent local-oscillator-power-to-primary-signal-power ratio (LO/SIG ratio). The system may be configured to: receive the voltages for a plurality of optical signal components split from a combined SIG and LO signal; determine individual factors for the plurality of optical signal components; average the individual factors; determine whether the averaged output is less than a minimum reference value for a variable optical attenuator; determine whether the averaged output is greater than a maximum reference value for the variable optical attenuator; change a value associated with the averaged output to the minimum reference value, due to determining that the averaged output is less than the minimum reference value; change a value associated with the averaged output to the maximum reference value, due to determining that the averaged output is greater than the maximum reference value; and change a new value associated with the averaged output to be transmitted to the variable optical attenuator.

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