今天,世界上几个大型电话系统已采用由玻璃纤维传送光脉冲的技术,光学纤维将电线彻底逐出信息传输领域的一天即将到来。这一变革的根本原因是光脉冲对信息的传送比电脉冲更快更准确。用单束光导纤维传送信息就象在一间没有混响的屋子里谈话,传出的声音快速、清晰、误差少。但单束 Today, several large telephone systems in the world have adopted the technology of transmitting optical pulses through fiberglass, and the day is coming when optical fiber will completely erase wires from the field of information transmission. The fundamental reason for this change is that light pulses send information faster and more accurately than electricity pulses. Transmitting information with a single bundle of optical fibers is like talking in a room without reverberation, making the sound fast, clear, and error-free. But a single bundle