由于光纤传输是社会基础设施的组成部分,它的重要意义可能不是显而易见。但如果隔着大西洋或太平洋打国际电话,人们就可能体会到通讯是惊人的清楚,这是由于采用光学脉码调制(PCM)和光纤传输的结果。由于激光器发明的促进,60年代是光通讯 Since fiber optic transmission is an integral part of social infrastructure, its significance may not be obvious. But if you make an international call across the Atlantic or the Pacific, one might realize that the communication is astonishingly clear as a result of using optical pulse code modulation (PCM) and fiber optic transmission. The 1960s was a result of the invention of lasers, which were optical communications