各种光纤接入技术-毕业论文外文翻译

各种光纤接入技术-毕业论文外文翻译内容摘要：

routing to the packet work, voice trafficwill be transmitted to the PSTN, ISDN or other packet works. Cable modem in HFC work to provide highspeed data munications, it will be divided into upstream bandwidth coaxial cable channels and downlink c 10 hannels, which can provide VOCline entertainment, Inter access and other services, while also providing PSTN services. Fixed wireless access systems such as smart antennas and receiver uses many hightech, is an access technology in innovative ways, is currently the most uncertain access technology as a way of still practice in the future further exploration. The optical access system can provide enough bandwidth to support all currently foreseeable business, but there are still technical and economic problems need to be in the product development and technical innovation in order to make it a 21st century work access system mainstream technology. . Silicon Innovative optical working technology from the quartz optical fiber to a further need for pound semiconductor devices such as a set of ponents, including lasers, sensors, and modems. To meet such a wide range of functional requirements for electronic facilities have developed lowcost silicon technology. SIOB technology is a silicon chip, passive devices and lasers, and sensors can be integrated in the movable support shelf, above a variety of devices connected, for small modules, manufactured by SIOB technology has sufficient density optical integrated circuits . SIOB technology has been applied to lasers, photoelectric sensors, passive wave splitter, WDM filter, no light absorbing spherical optical lens attached body, rotating mirror, optical steering device, and the electrowinning metals. MEMS is a tiny solid mechanical ponents, its size is usually less than 1 mm. MEMS has the amazing featurerich, and can be plex chip integration, the current MEMS technology is still at the research stage, scientists tried to use silicon chips to create their own for the optical munications ponents with moving parts, the technology has broad development prospects of the application of this technology will produce a qualitative leap in optical works. Development and Innovation Optical Network quartz fiber need to plete pound semiconductor equipment ponents, and silicon technology is advancing the field of optoelectronics and innovation in this field has been formed Silicon Photonics, the interdisciplinary science, as the silica Optical technology has laid a theoretical foundation, has bee the driving force to promote the rapid development of optical works. Since the mid8039。 s silicon technology has been silicon film and processing technology has bee mature, because silicon has the people39。 s wish for many physical properties, as its refractive index stability, and easy to control, in a silicon chip, passive ponents and lasers and sensors can be integrated in the movable support shelf, with SioB technology manufacturing optical density of integrated circuits are adequate for singlechip processing can produce a large number of chips, a variety of functions have been integrated on the chip. SioB technology has been widely used in integrated lasers, photoelectric sensor, no light guide fiber splitter, WDM filter, no light optical fiber and ball lens attached body, rotating mirror, optical stee 11 ring devices and electrical product metals. From the mid90s, integrated photovoltaic technology started to apply munications work, such as Dragone router, a merger in the DWDM system and routing the optical wavelength channel IC has been developed from the 8channel 72channel, while the micro motor system (MEMS) is a small solid mechanical components, micromotor system can manufacture epitaxial growth, the pattern formation and etching processing, integrated circuit manufacturing technology in the substrate to plete, confident in the 21st century, the silicon microelectromechanical systems optical field of innovative technology, used in the near future, nextgeneration optical work. 2. Access Network The socalled access work is the exchange between the Bureau to the user terminal equipment, all machine lines (the physical location of the access work), in which the backbone system for traditional cable and fiber optic cable, usually several kilometers long。 wiring system may be cable and optical cable generally a few hundred meters in length。 the introduction of a few meters to tens of meters long lines often. ITUT requirements, access work refers to business contacts Interface (SNI) and the associated user work interface (UNI) a transfer between entities (such as the line facilities and transmission facilities) are formed to provide the necessary services for the transmission of data transmission capacity of the implementation of the system, it can be configured via the Q3 interface, and management. Transmission entities to provide the necessary carrying capacity of the transmission, signaling is transparent to users, no further treatment. It can be seen as nothing to do with business and application delivery work, mainly to plete crossconnect, multiplexing and transmission functions, usually without switching. The structure of work access methods, collectively known as work access technology, its work in connection with the user39。 s last mile work access part is the most promising part of a substantial increase in work performance. On the local loop work this is a bottleneck on the 100 million users worldwide access lines, its function is limited to impede the development of business users, while the other end with subscriber line highperformance equipment in sharp contrast. As electronic technology and the rapid development of optoelectronic technology, digital electronic system (from a personal puter to a work switch or。