COMMUNICATIONS DEVICE

摘要

A communications device has an electrical input for an analogue radio-frequency electrical input from a host device, a lasing device with an optical output for coupling to an optical fibre and circuitry for applying current to the lasing device so that the laser light corresponds to the analogue electrical input. A releasable electrical connection allows plugged coupling to the host device and a releasable optical connection allows plugged coupling to the optical fibre. A similar optical-to-electrical device is also disclosed, so as to enable a distributed antenna system with pluggable elements to be formed.