Optical communications system

摘要

An optical communications system (300, 400, 500) comprising a first transmit unit (301, 401, 402) and a first receive unit (302, 401, 402). The first transmit unit comprises an electro-optical modulator (311) for modulating one or more radio channels bearing electrical signals with a total bandwidth B by a laser signal (310) with a laser frequency fL1, and the first transmit unit also comprises a transmit filter for outgoing signals from the electro-optical modulator. The first receive unit comprises an electro-optical demodulator (313) for demodulating the one or more electrical signals received from the first transmit unit by means of a Local Oscillator, LO (312), which produces an optical signal at a second frequency fL2, and B ranges from the lower of fL1 and fL2 to the higher of fL1 and fL2.

主权项

1. An optical communications system comprising a first transmit unit and a first receive unit, with the first transmit unit comprising an electro-optical modulator for modulating one or more data streams with a total bandwidth B into an optical signal by a laser signal with a laser frequency fL1, the first transmit unit also comprising a transmit filter for outgoing signals from the electro-optical modulator, the first receive unit comprising an electro-optical demodulator for demodulating the optical signal received from the first transmit unit using a Local Oscillator, LO, which produces an optical signal at a second frequency fL2, wherein the valves for fL1 and fL2 are set at opposite ends of B, which ranges from the lower of fL1 and fL2 to the higher of fL1 and fL2.