Patent · US Expired

Modulation scheme and transmission system for NRZ signals with left and right side filtering

US7319823B2 · kind B2 · utility

1Cited by

6References

5Claims

0Family size

Assignee

ALCATEL · FR

Inventors

Sebastien Bigo · Palaiseau, FR
Yann Frignac · Paris, FR
Wilfried Idler · Asperg, DE
Eugen Lach · Erbach, DE

Key dates

Filing date	Jan 25, 2002
Grant date	Jan 15, 2008
Priority date	—
Expiry date	Jun 26, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH04J14/0224
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

The invention shows a transmission system with a transmitter function, a transmitting fiber and a receiver function where the transmitter function comprising lightsources (1), modulators (2) and a multiplexer (3), and the receiver comprising at least a demultiplexer (5), filters and electrical receivers where the channels for left side filtering are modulated with modulators with a negative chirp and for right side filtering with modulators with positive chirp.

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