Showing papers on "10G-PON published in 1990"

Linear lightwave networks: how far can they go?

Abstract: A novel type of lightwave network architecture that is based on establishing controllable, optically transparent paths among network users is described. The objective is to provide optical connections on demand. These connections would support a high degree of flexibility, including user-chosen modulation formats and bit rates, for large numbers of user stations (e.g., 100000) using mesh-type topologies that are spread over geographical areas that may extend to diameters of several thousand kilometers. The networks in question perform only linear operations on optical signals, essentially operating as a dynamically controlled 'ether' within which light beams are selectively directed between prescribed source-destination pairs. Because these linear lightwave networks are controllable, they are capable of being reconfigured in response to changing load conditions or component failures. >

The design of a TDMA system for passive optical networks

Abstract: The authors describe the design methodology and implementation details of a time-division multiple access (TDMA) system which has been developed to allow point to multipoint operation of passive optical networks. This TDMA bit transport system transparently handles the multiplexing and control functions required for passive splitting optical networks. The system is generic and, with relatively simple interfacing, applicable to switching systems worldwide. The design has been implemented in ASIC (application-specific integrated circuit) technology for a forthcoming UK field trial of fiber in the subscriber loop. >

A B-ISDN local distribution system based on a passive optical network

Abstract: An experimental system that transports ATM (asynchronous transfer mode) cells through a passive optical local network (APON) is described. It distributes a 155.52 Mb/s ATM stream from an ATM node to 64 customer ends, synchronizing return cells to interleave at the exchange. A variant of the Orwell protocol is used for bandwidth control. Key features demonstrated are clock phase alignment and an exchange optical receiver design to realize a practical system. APON provides dialog service to those smaller customers that cannot be economically served using dedicated point-to-point links, permitting early economic deployment of ATM to smaller, or start up customers. >

Future fiber access needs and systems

Abstract: BellSouth's Superhome/Superoffice fiber optic concept is the focus of this discussion of evolving communication needs and services. Existing and planned optical fiber deployment in Southern Bell's four-state area is described. The broadband services to be offered include high-speed data and full-motion video services (such as high-speed facsimile) and wide-area networks interconnection. Some of the other benefits of the Superhome/Superoffice are improved security and improved health and medical support. Ways to finance home information systems are considered. >

The Use Of Optical Interconnection Architectures In The Telephone Exchange Environment

Abstract: To meet the challenges of the future telecommunications networks will consist predominately of single-mode optical fibre systems. Playing a leading role in realizing the full potential of this developing network will be the central switching nodes including trunk and local exchanges. However, to date there has been little general investigation into the interconnection medium to be used within the exchange environments and therefore there is the possibility that the full benefits of the external optical networks and current equipment modernization will not be fully effective due to the restrictions of the copper pair and coaxial interconnection architectures used. The most evident limitations of copper interconnections are: physical size and weight, small bandwidth (when compared with fibre), restricted transmission distances, EMI and EMC problems, limited networking opportunities, inflexible termination technology, and crosstalk between adjacent connectors and cables etc.

Fibre to the home—The passive way

Abstract: Passive optical networks are an attractive alternative to copper for basic POTS delivery in the near term. Since PONs provide a direct photonic path between the exchange and the customer they offer the maximum opportunities for network evolution by allowing services to evolve naturally and independently in the market place.

Optical amplifiers for video distribution

Abstract: The promise of a broadband fibre communications network has attracted the interest of CATV and Telco concerns. Various networks and topologies have been discussed. Cost is a drawback in some of the proposed networks, particularly those networks which require switching. This paper discusses a low cost broadcast tree and branch network which uses optical amplifiers to extend the network penetration. Recent work in the development of optical amplifiers suggests that the Erbium fibre amplifier may be compatible with VSB-AM. The characteristics of such an amplifier will be discussed. This scenario allows an orderly transition from the present-day AM backbone system to the tree and branch fibre architecture. Once the broadband fibre plant is in place new services can be implemented that exploit the broadband nature of fibre.

FOCON/34-fiber optical network for voice and data

Abstract: A family of fiber-optic local area networks (LANs) intended to meet future requirements for naval and land-based applications was developed. High-speed transmission, flexibility, the ability to transmit data, voice and narrowband video and an excellent survivability were the main aims envisaged. The first product of this family was FOCON/8 (fiber optical communication network-8 Mb/s) which has been installed on the new M-frigates of the Royal Dutch Navy. Based on the experience gained from FOCON/8, an even more sophisticated system, FOCON/34 (fiber optical communication network-34 Mb/s) is under development. >

The role for wavelength routed optical networks in telecommunications and computing applications

Abstract: The authors outline the aspects of wavelength routing in the context of both telecommunications and computer networks. Experimental results on network range and the use of both semiconductor and fibre based optical amplifiers to extend both the range and splitting capability are presented. Finally the use of active optical devices, for example amplifiers, to provide network switching functions are discussed. >

Passive Star Based Optical Network For Automotive Applications

Abstract: Fiber optic networks in the telecommunications and Local Area Network (LAN) applications are typically active networks (point to point fiber optic links interconnected using active devices). Short distance automotive networks have a sufficient flux budget to allow passive optical distribution. This paper reviews the differences between Telecommunications, LAN, and automotive network applications. The benefits of a passive star architecture will be described and a passive star implementation, based on large diameter plastic fibers, will be described.

Australian Passive Optical Network Developments for Subscriber Loop Applications

Abstract: An experimental shared fibre access system for subscriber loop application is described. The system known as MACNET, involves the use of a passive optical coupler located in the street near the cluster of customers served by the network. The experimental system was designed primarily for the delivery of narrowband telecommunication services but the overlay of distributive video has also been demonstrated. The successful development and the experience gained from the experimental system has led to detailed studies for a trial system based on the provision of a fixed access capacity. A particular implementation of this trial system is discussed, as well as an overlay for bi-directional video transmission.