Nortel Networks Corporation

Rockstar Consortium US LP

David Park

Osama S Aboul-Magd

Gerard Leo Swinkels

Ornan A Gerstel

Rajiv R Ramaswami

Vincent Handerek

Robert William Keys

Robert R Ward

Frederic J Simard

Humair Raza

Vasant Sahay

Babu O Narayanan

Lisa M Gaen

Christopher R S Fludger

Automatic discovery and verification of optical communication links as well as isolation of link failures in an optical communication system.

Link discovery, verification, and failure isolation in an optical communication system

A control system for an agile optical network uses constraint-based rules to minimize route validation computations required when the network is reconfigured. A hierarchical control structure facilitates admission control and insulates admission control from interaction with the physical layer of the network.

Control system for an agile optical network

A power supply for a pump laser in a distributed Raman amplifier is modulated with a small amount of amplitude modulation. This amplitude modulation transfers to the traffic wavelengths and is detected at a Raman amplifier control system. The Raman amplifier control system decodes the modulation and determines the amount of modulation transferred to the traffic. Given knowledge of the signal level of the modulation that was applied the gain of the distributed Raman amplifier may be determined. The Raman amplifier control system may then control the power supplied to the pump laser to result in a specific gain, thus providing closed loop control.

Amplitude modulation of a pump laser signal in a distributed raman amplifier

Growing community of inventors

Kanata, Canada

David Park