Nortel Networks Corporation

Ibionics Inc

Patrick, James Finlay

Michel Pigeon

Kexing Liu

Gino Totti

David Milton

Tomas Valis

Matthew D Brown

Chung Y Wu

Steven Prawer

Marc A Nadeau

James Moser

Anne Louise Bruneau

A system, device and method for wirelessly providing power and data to a remote device having a source apparatus generating a modulated collimated beam and a steerable optical element. A remote device with a receiver to convert the modulated collimated beam into an electrical signal which provides a power component for powering the device and a signal component. An uplink channel relays feedback data to position the collimated beam onto the receiver.

Transmission of energy and data using a collimated beam

A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.

WDM optical network with passive pass-through at each node

A system for recovering a clock signal from a data signal is described. The system uses an oscillator adapted to generate an oscillator output signal, a first detecting circuit for obtaining a coarse frequency-lock condition between the data signal and a recovered clock signal, a second detecting circuit for obtaining a phase-locked condition between the data signal and the recovered clock signal, a lock-detecting circuit responsive to the first detecting circuit for detecting an out-of-lock condition between the data signal and the recovered clock signal, and a control circuit responsive to the lock-detecting circuits and adapted to control the oscillator to generate an oscillator output signal on the basis of the first detecting circuit during an out-of-lock condition, and otherwise to generate the oscillator output signal on the basis of the second detecting circuit. The advantages include a much wider pull-in range for frequency acquisition, and an accurate and robust measure of a quality of received data.

Method and apparatus for clock recovery and data qualification

Technique for detecting noise on a data channel

WDM optical network and switching node with pilot tone communications

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Nepean, Canada

Michel Pigeon