Nortel Networks Corporation

Rockstar Consortium US LP

Babu O Narayanan

Robert R Ward

Humair Raza

Ornan A Gerstel

Rajiv R Ramaswami

Osama S Aboul-Magd

John Duncan McNicol

Robert William Keys

Frederic J Simard

Vasant Sahay

David Park

Yong-Qin Chen

Rani Indaheng

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

Apparatus and methods are disclosed for alignment of an input mirror and an output mirror in a photonic cross-connect.

Alignment laser for use in cross-connects

A method for calibrating a preferred disposition for a moveable first mirror of an optical switch core of a photonic crossconnect device relative to a second mirror thereof, the method comprising the steps of determining approximate geometric coordinates of the first mirror relative to the second mirror, effecting a laser light crossconnection between the first and second mirrors to produce data from which to provide first order corrections to refine the geometric coordinates, and effecting a further laser light crossconnection between the first mirror and a third mirror, to produce data from which to provide second order corrections to further refine the geometric coordinates, whereby to calibrate the first mirror such that upon initiation of a laser light crossconnection involving the first mirror, a switching element detects deviation of the first mirror from the preferred disposition thereof and effects corrective changes.

Method for calibrating photonic crossconnect device

A photonic switching apparatus includes primary photonic switching logic to perform photonic pass-through and add/drop functions and secondary photonic switching logic to reduce the effective number of add/drop interfaces and/or switch optical signal channels to and from clients or client adaptation devices.

Photonic switching including photonic pass-through and add/drop capabilities

Growing community of inventors

San Jose, CA, United States of America

Babu O Narayanan