With the development of the fiber communication , very high speed fiber optic backbone has being closed to the customer , but few customers has connected to fiber backbone directly . on the other hand , many customers are running some high speed network within their lan , such as fast ethernet ( 100mbps ) , or gigabit ethernet ( 1 . 0gbps ) 随着光纤通信技术的发展， 2 . 5g - 10gbps的光纤干线正在不断的向用户延伸，但由于成本和光纤敷设工程上的难道，只有很少的用户直接和光纤干线相连，通常光纤只延伸到了路边、小区；另一方面，许多用户内部的局域网也具有很高的传输速率，一般为100mbps甚至1gbps的以太网。
Optical code division multiplex access ( ocdma ) is a novel kind of technologies which combines with the features of wireless cdma and optical fiber communications and has strongly technical advantages and widely applied perspectives . it is one of the possible resolutions for future all optical communication network , which is a hot topic in optical communication research 光码分多址( opticalcodedivisionmultiplexaccess , ocdma ) ,是将无线cdma技术与光纤通信技术相结合的一种新技术,结合了两种通信方式的特点,具有很强的技术优势和广阔的应用前景,成为未来高速全光通信网络的备选方案之一,是目前光通信研究领域的热点。
With the rapid development of optical fiber communication technology , low - cost and high quality near inferred laser and light emitted diode working at room temperature become widely available . the emit wavelength from these light resource is not only consistent with the three low - decay windows of fiber optics , but also with many wide - frequency or recombination absorption spectrum of environmental and industrial gases 光纤通信技术的发展使相对低价、工作于常温、高质量的近红外激光和发光二极管可广泛获得，这些发光光源的发射波长与光纤的三个低损耗窗口相一致，也与许多环境和工业气体的泛频或复合吸收谱线相一致。
With the fast development of technology of network and optical fiber communication , particularly , the dense wavelength division multiplexing fiber communication system commercialized in recent years , the scope of network system grows more and more great and complex . so the maintenance of network management is required of high quality 随着网络技术、以及光纤通信技术的快速发展，特别是近年来密集波分复用光纤通信系统的商用化，使网络系统的规模越来越大，复杂性越来越高，这对网络管理维护提出了更高的要求。
Shenzhen guohao communication technology co . , ltd , a professional hi - tech electronic manufacturer , which specilizes in manufautring media converter , pdh optical multiplexer , protocol converter , fiber modem , multi - service multiplexer , passive optical components , optical distribution system , two - way radios etc 。 深圳市国昊通信技术有限公司是集科技开发、生产制造、销售代理、工程施工于一体的高新技术型企业，以光纤通信技术为基础，以无线通讯设备为导向，为众多行业用户提供系列光纤通信产品，数据通信产品以及对讲机通讯产品。
The first generation uses the shortwave ( 0 . 8 m - 0 . 9 m ) and multimode fiber , and the second generation uses long wave ( 1 . 3 m , 1 . 5 m ) and singlemode fiber . and now the third generation uses dwdm fiber - communicating technic . sichuan wide band transmission net optical fiber system is an important project of sichuan telecom 宽带传输网从采用短波长( 0 . 8 - 0 . 9 m )和多模光纤的第一代光纤通信技术到采用长波长( 1 . 3 m 、 1 . 55 m )和单模光纤的第二代光纤通信技术发展到了今天采用dwdm ( densewavelengthdivisionmultiplexing )的第三代光纤通信技术。
