Fibre-optic communication system, a communication apparatus for the same, and a vehicle

A vehicle comprising a communication apparatus for a fibre-optic communication system, the communication apparatus comprising:

• an optical coupler;
• an input port optically coupled to the optical coupler via a first waveguide, the input port being arranged to receive light;
• a modulator optically coupled to the optical coupler via a second waveguide, the modulator comprising a logic input and a fibre having a fibre Bragg grating (FBG) arranged to receive the light from the input port via the optical coupler, the modulator being operable to vary a strain force applied to the fibre according to a logic signal received at the logic input so as to modulate a wavelength of a modulated light signal reflected by the FBG back to the optical coupler;
• an output port optically coupled to the optical coupler via a third waveguide so as to receive the modulated light signal therefrom, the output port being operable to output the modulated light signal, and
• a transducer or mechanical actuator physically coupled to the fibre in the modulator and in communication with the logic input, and the transducer or the mechanical actuator is operable to generate the strain force based on the logic signal.