摘要 |
In an optical communication method, an accurate common clock signal (GPS) is provided to a sender ( 10 ) and a receiver ( 20 ). In the sender, the common clock signal is received, a first clock signal (CLK 1 ) is generated on the basis of said common clock signal, a carrier wave with a predetermined carrier frequency (f) is generated using said clock signal as timing reference, the carrier wave is modulated with a data signal, and the modulated carrier wave is transmitted using a light beam ( 13 ). In the receiver, the common clock signal is received, a reference signal having the same frequency (f) as the carrier frequency is generated on the basis of said common clock signal, said optical beam ( 13 ) is received, a detection signal is derived from the optical beam, the receiver is tuned to the predetermined carrier frequency (f), and the data signal is derived from the detection signal.
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