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Radio and Electronic Engineer

Issue 7.8 • July-August 1981

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Displaying Results 1 - 13 of 13
  • Optical fibre communications

    Publication Year: 1981, Page(s):303 - 304
    IEEE is not the copyright holder of this material | PDF file iconPDF (307 KB)
    Freely Available from IEEE
  • Optical fibre transmission lines

    Publication Year: 1981, Page(s):313 - 325
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1537 KB)

    Optical fibre transmission lines have many advantages over coaxial cables. The most widely used fabrication techniques involve chemical vapour deposition resulting in losses of well below 1 dB/km. Analysis of propagation follows well-defined principles and the results obtained are broadly comparable with those at microwave frequencies, although the wavelength of operation, ¿1 ¿m, is much shorter... View full abstract»

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  • Some recent optical fibre developments. Part 1

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (437 KB)
    Freely Available from IEEE
  • Optical fibre cables

    Publication Year: 1981, Page(s):327 - 332
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (766 KB)

    Optical fibre cables serve to protect the fibre sufficiently to allow installation of the cable without impairment of the transmission characteristics and to ensure fibre survival over the life of the cable. The degree of protection required is examined and some possible ways it may be achieved in practice discussed. View full abstract»

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  • Connectors for optical fibre systems

    Publication Year: 1981, Page(s):333 - 340
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (974 KB)

    This paper outlines the requirements of demountable connectors for optical fibres and cables used in data links and telecommunications applications. Problems associated with alignment and termination of the mating fibres are discussed. The various methods for overcoming or minimizing these problems are reviewed and specific examples of connector technology are highlighted. Some techniques for meas... View full abstract»

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  • Light-emitting diodes for optical fibre systems

    Publication Year: 1981, Page(s):341 - 348
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2273 KB)

    Light-emitting diodes are important fibre optic sources not only for short haul, low cost data links, but also in the long haul, high data rate telecommunications field. This paper discusses the range of applicability of l.e.d. sources, and the performance, design and optimization of such devices. Results are given for devices operating both in the low-loss 1.3¿m window and in the 0.8¿0.9 ¿m wi... View full abstract»

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  • Receivers for optical fibre communications

    Publication Year: 1981, Page(s):349 - 361
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1524 KB)

    This paper is a review of today's state-of-the-art in receivers for optical fibre communications, both in practice and in theory. The functions of an optical receiver are discussed, and a detailed description of unity-gain photodiodes is given. The problem of detection in the presence of noise is treated next, and the difference between optical and radio-frequency systems is highlighted. The theor... View full abstract»

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  • Semiconductor laser sources for optical communication

    Publication Year: 1981, Page(s):362 - 376
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2530 KB)

    The paper is a general review of double heterostructure GaAlAs and GaInAsP injection lasers and their application in long-distance optical communication systems. After briefly describing the physics of semiconductor laser operation, the performance of oxide stripe and advanced laser structures at 0.85, 1.3 and 1.55 ¿m wavelength is discussed. The parameters of greatest importance in optical commu... View full abstract»

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  • Systems applications of optical fibre transmission

    Publication Year: 1981, Page(s):377 - 384
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1051 KB)

    This paper describes a number of systems to demonstrate the wide application of fibre optic technology. It covers both undersea and landline trunk applications together with a discussion of power budgets and an indication of the benefits of long wavelength technology. Lower-speed digital systems for junction applications and avionics, military and industrial use are described as well as the transm... View full abstract»

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  • Characterization of single-mode optical fibres

    Publication Year: 1981, Page(s):385 - 391
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (878 KB)

    Experimental techniques for the measurement of total loss and absorption loss, chromatic and monochromatic bandwidth, mode cut-off and refractive index profile are reviewed and illustrated by the results obtained on a particular single-mode fibre. The relationship between theory and experiment is explored. View full abstract»

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  • Some recent optical developments. Part 2

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (735 KB)
    Freely Available from IEEE
  • Optical fibre transmission systemsߞthe problems of formulating optical radiation safety criteria

    Publication Year: 1981, Page(s):393 - 396
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (466 KB)

    Although national and international standards regarding laser safety either already exist or are in the course of preparation, they do not specifically cover the use of lasers in optical fibre transmission systems. It is necessary to relate the safety requirements for lasers as published in the national and international standards to optical sources as used in optical fibre transmission systems. T... View full abstract»

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  • Integrated optics: a tutorial review

    Publication Year: 1981, Page(s):397 - 413
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2302 KB)

    Integrated optics involves the use of thin transparent dielectric layers on planar substrates as optical waveguides. Various methods can be used to couple light into and out of the guiding layers, including butt and transverse coupling, prisms and diffraction gratings. Optical components are defined by photolithography, and may be passive (such as strip waveguides with bends, junctions and directi... View full abstract»

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