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光缆的出现为信息传输开创了新的局面七十年代以来,尽管西方一些主要工业发达国家一直处于经济衰退之中,可是新兴的信息技术却发展较快,其中光纤通信的崛起与发展十分令人注目。经过十三年的研究、实验、现场试验和并网试用等四个阶段,光纤通信已在美国、日本、英国、加拿大等国进入商用推广阶段,现已在电信、广播电视和闭路电视、电子计算机数据通信、铁路、电力、交通、工业等领域得到了多方面的推广应用。
Since the 1970s, although some of the major industrialized countries in the West have been in a recession, the emerging information technology has developed rapidly. The rise and development of optical fiber communications is very impressive Attention. After thirteen years of research, experiment, field test and grid trial, optical fiber communication has entered the stage of commercial promotion in the United States, Japan, the United Kingdom, Canada and other countries. Now it has been used in telecommunication, radio and television and closed-circuit television, Computer data communications, railways, power, transportation, industrial and other fields have been many aspects of the promotion and application.