OPTICAL CODE DIVISION MULTIPLEX TRANSMISSION ACCESS SYSTEM AND DEVICE

摘要

PROBLEM TO BE SOLVED: To provide the optical code division multiplex transmission access system and device of a high speed and a large capacity. SOLUTION: On a transmission side, optical pulses outputted from a pulse light source 202 are modulated in an optical modulator 203 based on payload data signals from a data generator 204, then encoded in an optical duo binary encoder 205 and transmitted through an optical multiplexer 206 and an optical fiber transmission line 207 to an optical demultiplexer 208 on a reception side. Then, demultiplexed light is decoded through an optical duo binary decoder 210 and converted to electric signals in a photodetector 211 and payload data are judged and detected in a threshold value element 212.