OPTICAL TRANSMITTER FOR OPTICAL-RADIO FUSION COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an optical transmitter capable of inexpensively and easily configuring a radio subscriber terminal in an optical-radio fusion communication system.

SOLUTION: A first optical modulator 4 applies carrier wave suppression double sideband optical modulation to an output light from a single spectrum light source 3, using an electric carrier wave signal having a frequency equal to a half value of the frequency of a radio signal generated in a first electric oscillator 7. A second optical modulator 5 applies carrier wave suppression double sideband optical modulation to an output light from the first optical modulator 4, using an electric carrier wave signal having frequency equal to a half value of the frequency of an arbitrary intermediate frequency generated in a second electric oscillator 8. A third optical modulator 6 applies optical intensity modulation to an output light from the second optical modulator 5, using the inputted electric digital signal.

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