| 摘要 |
A multiplexed optical transmitter according to this invention comprises first spreader which code-spreads first data stream of electrical signal by first spreading-code, first frequency-converter which converts a frequency of the code-spread first data stream into first frequency, and first electrical-optical converter which converts the first data stream into first optical carrier of first optical signal having a predetermined optical wavelength. Furthermore, the multiplexed optical transmitter comprises second spreader which code-spreads second data stream of electrical signal by second spreading-code, second frequency-converter which converts a frequency of the code-spread second data stream into second frequency, and second electrical-optical converter which converts the second data stream into second optical carrier of second optical signal having the predetermined optical wavelength. Then, an optical coupler couples the first optical signal and the second optical signal for generating a multiplexed optical signal having the first optical carrier and the second optical carrier.
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