Bit-rate and format insensitive all-optical circuit for reshaping, regeneration and retiming of optical pulse streams

US6636318B2 · kind B2 · utility

Assignee

• Alphion Corporation · US

Inventors

• Jithamithra Sarathy · Eatontown, US
• Bharat Dave · Howell, US
• Boris Stefanov · Gillette, US
• Ronald Simprini · Red Bank, US
• Tan Thai · Jackson, US
• Roman Antosik · Colts Neck Township, US
• Aleksandr Miglo · Waretown, US
• Olga Nedzhvetska · Eatontown, US
• Kwang Kim · Seoul, KR
• Doruk Engin · Red Bank, US

Key dates

• Filing date: Oct 5, 2001
• Grant date: Oct 21, 2003
• Expiry date: Oct 26, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L7/0075
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method and system for AO3R functionality is presented. The system includes an AO2R device followed by an AOCR clock recovery module and an AOR retiming device. The AOR retiming device takes as input a recovered clock signal extracted from the output of the AO2R by the AOCR clock recovery module. The output is the recovered clock signal gated by the regenerated and reshaped input signal, and a monitor circuit is used to set the optimum operations of the retiming device. In a first embodiment the output of the AOR retiming device is fed to an AOC code and wavelength conversion output stage, which returns the signal to the NRZ coding, on a service wavelength converted to match the fixed wavelength connection with the DWDM transmission system. In a second embodiment the code conversion is incorporated into the AOR retiming device, and wavelength conversion is accomplished in the AOCR clock recovery device.