A novel electro-optic technique suitable for modulating broad-band sources

Unlike conventional modulation techniques which generally require strict conditions upon the wavelength of illumination, the proposed electro-optic technique allows the transmission of a message with a broadband source. The principle of coding is based on an electro-optic phase modulation of light. Feasibility of the technique is demonstrated experimentally in white light in the case of the simultaneous transmission of two TV channels. Future prospects deal with multiplex transmissions. The technique might allow benefit to be taken of the broad spectral bands of LEDS that are widely used in wavelength multiplex systems.