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与无线传输和有线传输相比,光纤传输起步较晚,但发展迅速。在1970年,世界上出现了第一根传输衰减为20dB/km的光纤,并制成了可在室温下连续工作的半导体激光器。这些使光纤传输系统的研究工作得以向纵深方向发展,并迅速地得到了开发利用。在短短的二十几年里,光纤传输已从最初的多模单光纤近距离试用,发展为单模多芯光缆
Compared with wireless transmission and wired transmission, optical fiber transmission started later, but the rapid development. In 1970, the world’s first fiber with a transmission loss of 20 dB / km appeared and made a semiconductor laser capable of operating continuously at room temperature. All of these make the research of optical fiber transmission system develop in the depth direction and have been rapidly developed and utilized. In just two decades, optical fiber transmission has been from the initial close trial of multimode single-fiber, the development of single-mode multi-core optical cable