Cselt-Centro Studi E Laboratori Telecomunicazioni S.p.a.

Agilent Technologies, Inc.

Luca Pesando

Bruno Bostica

Franco Delpiano

Marco Burzio

Paolo Pellegrino

Method of and a device for coupling optical fibers and opto-electronic components

A circuit source has bias and modulation current generators for both p-type and n-type optical sources, and a pair of sources of control voltages for the bias and modulation current generators, which obtain pairs of control voltages from an adjustable driving current. An external signal allows selecting, by means of a control logic and CMOS gates, the generators required by the source. The circuit is made by using three pads of an integrated circuit, one for each control voltage source and the third comprising the current generators, the CMOS gates and the control logic.

Circuit in CMOS technology for high speed driving of optical sources

Transmitter module for optical interconnections, comprising a metal container housing an optical emitting device, an integrated circuit containing the driving circuit of the emitting device and an optical fibre extending outside the container, the emitting device being mounted on a metallic ground area realized on the integrated circuit. The cathode is electrically connected to the ground area and the anode is connected to a second metal area, connected with the output of the driving circuit. The module uses a type of assembly which minimises problems due to the length of the connecting wires, to parasitic effects and to the effects of signal reflections due to impedance mismatching. It also requires reduced power for its operation and it is provided with a structure facilitating dissipation.

Transmitter module for optical interconnections

Growing community of inventors

Bussoleno, Italy

Luca Pesando