Showing papers on "Optical Transport Network published in 1983"
TL;DR: A new network scheme, D-Net, is disclosed which has the advantages of high efficiency, low bounded delay, simple protocol, and implementation flexibility.
Abstract: The development of optical fiber point-to-point communications systems has generated substantial interest in the application of optical fiber to local area networks. The feasibility of using guided wave optical technology for local area networks is explored. Various network schemes, including Fibernet, Express-Net, and C-Net, are examined. A new scheme, D-Net, is disclosed which has the advantages of high efficiency, low bounded delay, simple protocol, and implementation flexibility.
83 citations
TL;DR: One- and two-way 6.3 Mbit/s optical transmission systems employing wavelength-division-multiplexing (WDM) are designed for application to telephone networks, and good transmission quality is confirmed for the systems by experiments.
Abstract: One- and two-way 6.3 Mbit/s optical transmission systems employing wavelength-division-multiplexing (WDM) are designed for application to telephone networks. Multiplexing at two wavelengths, 1200 and 1300 nm, as well as that at 810 and 890 nm, is found to be effective after taking the application fields and present fabrication techniques for optical multiplexers into account. Requirements for optical multiplexers are clarified through SNR design in which crosstalk is dealt with effectively. Optical multiplexers composed of newly developed dielectric multilayer thin-film filters are designed to meet the systems' requirements, and good transmission quality is confirmed for the systems by experiments.
20 citations
TL;DR: Some of the system issues that impact the design of fiber optic components intended for use in local area networks and some of the key contributions of fiber optics in local network applications as well as areas for further contribution are presented.
Abstract: This paper discusses some of the system issues that impact the design of fiber optic components intended for use in local area networks. How fiber optics technology affects system level decisions such as topology and system synchronization is also discussed. Finally, some of the key contributions of fiber optics in local network applications as well as areas for further contribution are presented.
17 citations
01 Feb 1983
TL;DR: Optical data links have been developed for use in multiplex wiring harnesses The links consist of optical fiber cords, optical connectors, and optical transceiver modules They can be operated under severe environmental conditions in motor vehicles and, because they have wide dynamic range, sensitivity adjustment is not required.
Abstract: Optical data links have been developed for use in multiplex wiring harnesses The links consist of optical fiber cords, optical connectors, and optical transceiver modules They can be operated under severe environmental conditions in motor vehicles and, because they have wide dynamic range, sensitivity adjustment is not required A heat-resistant optical fiber cord made of plastic has been developed to enable use at temperatures up to 80 deg C Mass-producible, low cost optical connectors have also been developed In optical transceiver modules, custom designed hybrid ICs are adopted for size reduction These optical data links are already in use in the Toyota Century
5 citations
22 Mar 1983
TL;DR: In this paper, the authors proposed to use Heterodyne detection to increase receiver sensitivity and permit closer optical carrier spacing and thus increase information carrying capacity, which would be achieved by IF filtering with highly selective electrical networks.
Abstract: Optical guided wave transmission has provided both economic and technical advantages for an array of telecommunication applications. The advances in capability of optical transmission have been the result of dramatic improvements in fiber and other opto-electronic devices. What has not changed significantly is the technique of superimposing information onto the optical carrier. As a result, the information carrying capacity and also the repeater free operation of guided optical wave systems have not reached their full poten-tial. Coherent optical communications is an approach whereby information is carried by either the amplitude, frequency or phase of an optical carrier. Heterodyne detection would increase receiver sensitivity and permit closer optical carrier spacing and thus increase information carrying capacity. This would be achieved by IF filtering with highly selective electrical networks. There are several implementation difficulties that must be overcome to achieve the advantages of optical coherent communications.