一、技术背景数字化时代的信息传递如此高效,一部分得益于光纤通信技术的迅猛发展。光纤这种材料最初诞生只是应用于医疗上的内窥镜。由于当时技术有限,光在光纤中传输衰减非常大,所以当时的研究者并不看好光纤在通信上的应用。之后经过英籍华人高锟博士的潜心研究,并提出大胆假设,又重新燃起了研究者们对于光通信的热情。又经过数年的研究,激光器和低损耗光纤都有了重大突破,这才使光通信变为了可能。光纤最初广泛应用于广电行业,而同时期的安防行业还在使用同轴电缆作为主要传输介质。但随着安 I. Technical Background The efficient transmission of information in the digital age is partly due to the rapid development of optical fiber communication technology. Fiber was first born of this material is used in medical endoscopes. Due to limited technology at that time, the transmission attenuation of light in the optical fiber was very large, so researchers at that time were not optimistic about the application of optical fiber in communication. After the British Chinese Dr. Kao Kun’s painstaking research, and made bold assumptions, but also rekindled the researchers for optical communications enthusiasm. After several years of research, major breakthroughs have been made in lasers and low-loss fibers, which made optical communications possible. Optical fiber was originally widely used in the broadcasting industry, while the same period of the security industry is still using coaxial cable as the main transmission medium. But with Ann