| 摘要 |
An information transmission system utilizing laser beams with information superimposed thereon by means of pulse code modulation and which comprises a plurality of repeater stations each of which contains a receiver in the form of a photosensitive semiconductor diode which directly detects the received signal, semiconductor amplifier pulse processing devices controlled by the signal pulses decoded by the associated receiver, and a transmitter in the form of a semiconductor laser which is not externally cooled for retransmitting the processed pulses. The information transmission between the repeater stations is effected by light-wave fiber conductors. |
