Method and system for establishing at least two bidirectional communication links using coherent detection

US10313048B1 · kind B1 · utility

Assignee

• ADVA Optical Networking SE · DE

Inventors

• Cornelius Fürst · Fürstenfeldbruck, DE
• Thomas Richter · Erlangen, DE
• Sorin Tibuleac · Johns Creek, US

Key dates

• Filing date: Nov 17, 2017
• Grant date: Jun 4, 2019
• Expiry date: Nov 17, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2011/0081
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method for establishing bidirectional communication links includes: supplying, to at least two optical transceiver modules at each side of at least two optical paths, a multiplexed optical CW signal comprising at least two optical CW signals having the same differing wavelengths, and modulating the multiplexed optical CW signal according to modulation signals; creating, at each side of the optical paths, at least two first and second optical transmit signals by optically filtering the modulated optical signals so that only a single wavelength remains, and routing pairs of a first and second optical transmit signal to the optical paths, wherein the optical transmit signals of each pair have differing wavelengths and wherein the optical transmit signals transmitted in the same direction over the same optical paths have differing wavelengths; receiving each optical transmit signals at a dedicated optical transceiver module by mixing it with the multiplexed optical CW signal.