# IEE Colloquium on Fibre Optic LANS and Techniques for the Local Loop

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Displaying Results 1 - 15 of 15
• ### Optimum design of subcarrier optical networks for local loop applications

Publication Year: 1989, Page(s):12/1 - 12/4
Cited by:  Papers (3)
| |PDF (168 KB)

Reviews the performance limitations of SCM broadcast LANs. Absolute limits to CNR have been established which are determined by the laser RIN and third order intermodulation distortion and hence are independent of receiver noise characteristics. This allows the maximum number of nodes and the modulation scheme to be determined at the planning stage. It appears that AM broadcast SCM television dist... View full abstract»

• ### Optical feedthrough' transmission systems for the local loop

Publication Year: 1989, Page(s):11/1 - 11/6
Cited by:  Patents (3)
| |PDF (224 KB)

In order to obtain bidirectional working, additional splitters or WDM multiplexers need to be installed on the fibre, either by splicing or by the use of optical connectors. The authors describe a novel transceiver design in which the separation of send and receive signals is performed after the incoming signal has passed through the send' laser. This technique, optical feedthrough', enables bid... View full abstract»

• ### Wavelength multiplexing in the local loop

Publication Year: 1989, Page(s):10/1 - 10/7
| |PDF (364 KB)

Single mode optical fibre will be installed within the local loop to reduce network operating costs for the provision of basic telephone services. The resulting passive optical network can then be used to support future demand for high rate services via the use of optical multichannel techniques. The authors briefly consider one way of providing telephony services and then describe some of the way... View full abstract»

• ### IEE Colloquium on Fibre Optic LANS and Techniques for the Local Loop' (Digest No.44)

Publication Year: 1989
| |PDF (24 KB)

The following topics were dealt with: FDDI; LAN; fibre optic backbone network; WDM; optical signal processing; optical switches; passive branched fibre network; HDTV; local loops; optical feedthrough techniques; blown fibre networks; and clip-on optical fibre power measurements View full abstract»

• ### High definition television transmission on single mode fibre for the local loop

Publication Year: 1989, Page(s):9/1 - 9/6
| |PDF (272 KB)

An experimental digital system for HDTV transmission is demonstrated to provide high performance transmission of a single HDTV channel over single mode fibre. The full NHK format signal necessitates a digital transmission rate of 864 Mbit/s which is comfortably within the constraints of current component technology. However, the time division multiplexing of several such HDTV channels (without com... View full abstract»

• ### Wavelength division multiple access in fibre optic LANs

Publication Year: 1989, Page(s):5/1 - 5/4
Cited by:  Papers (1)
| |PDF (220 KB)

Concerns optical fibre local area networks (LANs) which have a multichannel transmission capability provided by WDM. To obtain the usual connectivity and functionality associated with LANs, it is desirable that multiple access is provided to all WDM channels within the network. Hence it is necessary to consider the architecture for the multichannel optical fibre LAN in this context. A novel token ... View full abstract»

• ### CBN: a fibre optic backbone network

Publication Year: 1989, Page(s):3/1 - 3/5
| |PDF (220 KB)

The Cambridge Backbone Network (CBN) is a ring based backbone network implemented with fibre optics. It is being developed under a collaborative project between Olivetti Research Lab and the University of Cambridge, Computer Laboratory. The aim is to design and build a ring communication network for integrated computer data, voice and real-time video applications. The network will primarily provid... View full abstract»

• ### Prediction for the optical performance of a novel passive branched fibre network

Publication Year: 1989, Page(s):8/1 - 8/4
| |PDF (160 KB)

Describes a theoretical model for the transmission characteristics of a passive branched fibre network based on the statistical performance distribution of the components required for this network. The authors describe results for the throughput loss at a particular wavelength and for the complete spectrum. Both worst and best case network performance figures are evaluated and the predicted perfor... View full abstract»

• ### The installation of blown fibre networks within buildings

Publication Year: 1989, Page(s):13/1 - 13/4
| |PDF (192 KB)

Discusses the planning and quick installation of an optical fibre network within a commercial building, using the blown fibre technique. Completion of this trial installation demonstrated the inherent flexibility of the blown fibre system View full abstract»

• ### Use of FDDI in real time military systems

Publication Year: 1989, Page(s):1/1 - 1/5
| |PDF (208 KB)

The modern military system architecture is based upon distributed nodes connected by a local area network (LAN). Each node will perform a subset of the overall systems function. To act fast, in real time, it is necessary that all the processing has been completed on one unit of data before the next one becomes available. Most systems have the task of receiving data, correlating the received data, ... View full abstract»

• ### Spread spectrum communication network using optical signal processing

Publication Year: 1989, Page(s):6/1 - 6/3
| |PDF (128 KB)

A novel implementation of an all-optical signal processor is proposed for local area networks. The scheme based on a bipolar tap implementation incorporating a nonlinear component, and utilising a spread spectrum technique, allows multiple access to local area networks. Recently a spread spectrum technique, referred to as code division multiple access (CDMA), has been described for local area netw... View full abstract»

• ### The physical layer of a prototype Gbit/s multi-service network

Publication Year: 1989, Page(s):4/1 - 4/4
| |PDF (176 KB)

Networks such as FDDI that transfer information at rates up to 100 Mbit/s are just emerging. These will find application initially as backbones for 802.3 networks and as direct connections for high performance workstations. However, in many applications, e.g. remote simulation on supercomputers or high quality digital video transmission, these bandwidths are already insufficient. With the increasi... View full abstract»

• ### Clip-on' optical fibre power measurements

Publication Year: 1989, Page(s):14/1 - 14/8
| |PDF (184 KB)

Discusses a novel optical power meter which does not require access to the end of the fibre but instead measures power through the fibre coating. Typically the devices may be used either as a commissioning tool during installation or as a maintenance aid for fault location. A further improvement in measurement accuracy could be gained by reducing the size of the fibre specification box'. This wil... View full abstract»

• ### A comparison of the FDDI fibre optic network with the emerging IEEE 802.6 metropolitan area network

Publication Year: 1989, Page(s):2/1 - 2/6
| |PDF (228 KB)

By simulating both networks with the same physical layer data rate it has been shown that the maximum throughput of both networks is adversely affected by the presence of a high proportion of short packets in the traffic and that this effect is greater in the IEEE 802.6 network. It has also been demonstrated that the access delay of an IEEE 802.6 network is not significantly changed by an increase... View full abstract»

• ### The uses of optical switches in fibre optic local area networks

Publication Year: 1989, Page(s):7/1 - 7/4
Cited by:  Patents (13)
| |PDF (196 KB)

Lithium niobate optical switches show great promise for use in communications, principally because they can be used in systems where the data rate is much higher than would otherwise be possible. The local area networks that have been built using optical switches are reviewed. An obvious application of optical switches is as a node bypass in a ring network View full abstract»