Elliott Brothers (london) Limited

Trevor A Morgon

Edward L Lewis

Robin D Beasley

Trevor I Hall

A fibre optic terminal (1) for use with a bi-directional optic fibre (6) including an optical receiver (2) positioned in the path of light (8) emitted from an end (5) of the optical fibre to receive the light, and an optical emitter (4) arranged to emit light (7) from a position adjacent the optical receiver onto the end of the optical fibre, the position being in the path of light emitted from the end of the optical fibre so that substantially all of the light emitted from the optical emitter is incident on the end of the optical fibre, and the area from which the optical emitter emits light being small relative to the light receiving area of the optical receiver so that substantially all of the light emitted from the end of the optical fibre is received by the optical receiver.

Fibre optic terminals for use with bidirectional optical fibres

A modification of the hot crimp technique described in U.S. application Ser. No. 701,240 filed 30th June 1976. In that case a bundle of fibres was inserted into a glass sleeve and the sleeve and fibres were thrust into a hot conical bore to compress the sleeve and fibres to remove interstitial dead space. In an incidental feature of that technique, the compressed bundle is maintained concentric with the outer sleeve surface, and in fact, with the outer surface of a metal sleeve which may provide the conical bore. This feature is adapted for the present invention in which a single fibre is inserted into a close fitting glass sleeve through a tapered lead-in ferrule, the sleeve and ferrule are thrust through an outer metal sleeve having a conical end so that the glass sleeve and fibre are compressed concentrically. The assembly then provides an accurately concentric single fibre termination pin.

Optical fibre terminations

A multi-access fiber optic communication system in which each terminal of the system is directly connected with n other terminals of the system via point-to-point transmitting and receiving links and each terminal of the system includes regenerating means whereby a signal received by that terminal is re-transmitted to the other n terminals. The signals are pulse signals and the regenerating means are arranged to re-transmit a received pulse in response to the leading edge of a received pulse.

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Rainham, United Kingdom

Trevor A Morgon