Avago Technologies Fiber IP (Singapore) Pte. Ltd

Agilent Technologies, Inc.

Avago Technologies General IP (Singapore) Pte. Ltd.

Ian Mitchell

David Meadowcroft

Declan Reilly

Neil James Parkin

Christian Rookes

David Parkinson

Stephane Sicard

The present invention provides an optical transmitter comprising one control unit and a plurality of optical sources. Control signals are multiplexed and de-multiplexed as appropriate to enable control of all optical sources by the control unit.

Optical transmitter

An optical module and chassis incorporating 'keying' features that ensure the correct insertion of the module into a given chassis, thereby preventing damage to the module and/or the system to which the chassis is connected.

Keyed transceiver module

A module houses an optical transceiver device and provides a dedicated heat-transfer environment for the device. A fan draws in ambient air and blows it through a heat exchanger and out an exhaust. Heat transfer is by conduction from the device into the heat exchanger through an opening in an EMI shield of the device. In some embodiments the fan is a pluggable unit, allowing quick replacement if status LEDs indicate a fault.

Temperature control of heat-generating devices

A laser diode is matched to a laser driver IC by a microwave stub to take advantage of radio frequency/microwave effects of electrical conductors on high frequency signals. The microwave stub is a piece of microwave transmission line with a characteristic impedance defined by its physical dimensions and its material. A transmission line having a distributed set of capacitors and inductors is tuned over a range of frequencies by changing its operating length/width. A capacitor short circuits the microwave stub to ground. The capacitor position along the microwave stub determines the microwave transmission line operating length (and hence frequency). Therefore, a matching network is tuned by changing the capacitor position along the microwave stub instead of using several different valued capacitors.

Growing community of inventors

Ipswich, United Kingdom

Ian Mitchell