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IEEE LCS

Issue 4 • Nov. 1990

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Displaying Results 1 - 7 of 7
  • SONET: a network management viewpoint

    Publication Year: 1990, Page(s):4 - 13
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    SONET network management features are described, covering the layered overhead structure, performance monitoring, maintenance signals, orderwire channels, user channels, and data communication channels (DCCs). Basic deployment and network management concerns are examined. These concerns relate to midspan meet management, intraoffice DCC connectivity, and integration of SONET elements in existing m... View full abstract»

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  • Terabit-per second throughput switches for broadband central offices: an overview

    Publication Year: 1990, Page(s):20 - 27
    Cited by:  Papers (4)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB)

    The design of a broadband central office (CO) switch based on the SONET standard and the asynchronous transfer mode (ATM) protocol is addressed. An overview is given of the next generation switch (NGS), which has been proposed as a functional architecture for broadband networks and switching systems. The NGS consists of a number of different functional modules (interface, control, operations, serv... View full abstract»

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  • Heterodyne lightwave systems: moving towards commercial use

    Publication Year: 1990, Page(s):28 - 35
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (606 KB)

    The advantages of heterodyne detection are reviewed, and a historical summary aimed at showing that this technology is on track toward increasing commercialization over the next five to ten years is given. Solutions to many important problems are described, and the remaining problems are examined. Heterodyne detection is briefly compared with an alternative technique using direct detection, and a ... View full abstract»

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  • Direct detection lightwave systems: why pay more?

    Publication Year: 1990, Page(s):36 - 38
    Cited by:  Papers (18)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (753 KB)

    Requirements on detection technology are examined from the system and economic perspectives. The two possible detection approaches, direct and coherent, are described, and their theoretical detectability limits are considered. Examples of both types of networks that have been demonstrated are presented. Direct detection networks are then considered, and examples of demonstrated networks are presen... View full abstract»

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  • Photonic integrated circuits: research curiosity or packaging common sense?

    Publication Year: 1990, Page(s):50 - 56
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (474 KB)

    The potential of photonic integrated circuits (PICs) for meeting the requirements of high-connectivity optical communication architectures (where there is a variety of cascaded, interconnected optical devices at each station) at a reasonable cost is discussed. PICs refer to the monolithic (single-substrate) integration of optically interconnected guided-wave devices. PIC technology replaces the se... View full abstract»

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  • Optical amplifiers in future optical communication systems

    Publication Year: 1990, Page(s):57 - 62
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (366 KB)

    Recent research into optical amplifiers and their future applications is described, focusing on the erbium-doped fiber amplifier. The characteristics of the amplifiers are briefly described, and their use in long-haul transmission systems, undersea transmission systems, optical frequency-division-multiplexed systems, subscriber loops, and functional circuits is examined. Their potential role in br... View full abstract»

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  • Erbium doped fiber amplifiers for future undersea transmission systems

    Publication Year: 1990, Page(s):63 - 66
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (203 KB)

    Results obtained with analytical models of erbium-doped fiber amplifiers (EDFAs), which have potential as repeaters in lightwave transmission system, are summarized. The results pertain to the dispersion and noise characteristics of the amplifiers. Experimental results that verify some of the analysis are examined. The results show that EDFA systems are promising for undersea applications. Large d... View full abstract»

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This Magazine ceased production in 1991. The current retitled publication is IEEE LTS.

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