| 摘要 |
A free-space optical communication device includes a photodetector element, which receives a communication signal containing multiple infrared light signals respectively representing different information and converts the communication signal to an electrical signal by way of electro-optical conversion, and a signal selection unit, which receives the electrical signal from the photodetector element as input, extracts respective signals corresponding to the infrared light signals from this electrical signal, and individually outputs the electrical signal and the signals corresponding to the infrared light signals.
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