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IEE Proceedings J - Optoelectronics

Issue 5 • Date Oct. 1993

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Displaying Results 1 - 9 of 9
  • Architecture for large dilated optical TDM switching networks

    Publication Year: 1993, Page(s):337 - 343
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (583 KB)

    A novel architecture for optical TDM switching is introduced, comprising 2*2 optical switches integrated onto large substrates, and fibre delay lines. The performance of the architecture is characterised in terms of switch count, crosstalk, frame delay, attenuation and control complexity. It is shown that in the near future a system with 16 inputs and outputs, handling a total of 4096 TDM channels... View full abstract»

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  • All-optical clock extraction using two-contact devices

    Publication Year: 1993, Page(s):325 - 336
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1100 KB)

    A comprehensive summary of the operation of two-contact semiconductor self-pulsating laser diode (SP-LD) in both return-to-zero (RZ) and non-return-to-zero (NRZ) optical transmission systems is presented. Results demonstrate that this type of device has great potential as the basis for all-optical clock recovery circuits at multi-Gbits rates for switching applications. Results describe the basic d... View full abstract»

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  • Carrier-induced MESFET optical switches for photonic integration

    Publication Year: 1993, Page(s):317 - 324
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (464 KB)

    A study is made of the reverse-biased optical switches in a MESFET geometry. Carriers are controlled in the switching region by the gate voltage which can enhance the feasibility of carrier-induced devices in high-speed data communication, optical computing and photonic switching. A waveguide optical switch in a conventional MESFET geometry is proposed which gives an extinction ratio better than 8... View full abstract»

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  • Properties of optical switching networks with passive or active space switches

    Publication Year: 1993, Page(s):309 - 315
    Cited by:  Papers (11)  |  Patents (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (605 KB)

    Fibre optical communications switching networks with optical nodes containing optically passive (lithium niobate) or active (indium phosphide) space switches as well as erbium-doped fibre amplifiers are analysed numerically from a power budget point of view. Calculations include spectral gain characteristics and gain saturation in the optical amplifiers caused by accumulated amplified spontaneous ... View full abstract»

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  • InP digital optical switch: key element for guided-wave photonic switching

    Publication Year: 1993, Page(s):301 - 307
    Cited by:  Papers (4)  |  Patents (19)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (562 KB)

    The InP digital optical switch presented is compared with other types of switch. In addition to reverse- and forward-bias operation, its push-pull mode of operation is demonstrated for the first time, as well as its high-speed behaviour. The high potential of the digital optical switch and switching matrix fabrication are described. The results show that the InP-based digital optical switch has to... View full abstract»

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  • Optical switching in the twin-guide travelling-wave laser amplifier

    Publication Year: 1993, Page(s):296 - 300
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (365 KB)

    Detailed calculations have been made of the optical switching behaviour in twin-guide travelling-wave laser amplifiers driven with equal current in each guide. For typical device parameters, appropriate to 1.55 mu m InGaAsP devices, the analysis indicates that the switching occurs at about one quarter of the saturated power, which in practice means at about 1 mW for an unsaturated gain of 26 dB. T... View full abstract»

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  • Novel approaches to polarisation-independent switches

    Publication Year: 1993, Page(s):291 - 295
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (422 KB)

    Two new contributions on the subject of polarisation-independent switches are presented. The first concerns experimental results on a polarisation-independent directional coupler with extremely relaxed fabrication tolerances, and the second is a proposal for a digital optical switch in unconventional orientation.<> View full abstract»

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  • Soliton ultrafast all-optical mesh networks

    Publication Year: 1993, Page(s):285 - 290
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (519 KB)

    Channel transmission error arguments show how the size of an all-optical multihop network employing deflection routing is limited for a given optical bit rate. These limits are quantified for nonregenerative all-optical mesh networks such as Manhattan Street network and ShuffleNet employing solitons. It is found that the node-to-node fibre span cannot exceed a few kilometres for network sizes up t... View full abstract»

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  • Spectral characteristics of coupled-waveguide Bragg-reflection tunable optical filter

    Publication Year: 1993, Page(s):275 - 284
    Cited by:  Papers (4)  |  Patents (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (760 KB)

    The transmission and reflection spectrum of the coupled-waveguide Bragg-reflection filter are computed by a new method. The filter is based on the use of a Bragg grating to obtain contradirectional coupling between two dissimilar waveguides. The analysis shows that the tuning range should be similar to that of a simple Bragg grating filter, but with the advantage of having the output separated fro... View full abstract»

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