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在近距离光缆传输系统的第一次现场试验中,提出了通用光缆传输系统作为传输试验系统之一。本系统的特点是用宽频带光缆和没有定时功能的2R 中继器,构成比特率可变的中继传输线路,无论是数字信号或脉冲频率调制的模拟信号都能够中继传输。本论文叙述了关于通用光缆传输系统的目的,系统设计,试制设备的构成,现场试验的结果等。传输特性的试验结果与设计理论值基本上一致,证实了设计方法的可行性。并且还通过实验证实了可用梯度型多模光纤和激光二极管构成中继距离7.5公里以上,传输距离为50公里的传输系统,得出了系统实用化的结论。
In the first field test of optical fiber cable transmission system in near distance, a universal optical cable transmission system was proposed as one of the transmission test systems. The system is characterized by wideband fiber optic cable and no timing function of the 2R repeaters constitute a variable bit rate relay transmission lines, whether it is digital signal or pulse frequency modulation of analog signals can relay transmission. This paper describes the purpose of the universal optical cable transmission system, system design, prototype equipment, field test results. The test results of the transmission characteristics are basically the same as the theoretical values of the design, which proves the feasibility of the design method. It is also confirmed experimentally that a transmission system with a relay distance of more than 7.5 km and a transmission distance of 50 km can be formed by using a gradient multimode optical fiber and a laser diode. The conclusion is put forward that the system is practical.