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Interference filter all-fibre directional coupler for w.d.m.

Interference filter all-fibre directional coupler for w.d.m.

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© The Institution of Electrical Engineers
Published

Directional couplers for wavelength division multiplexing using l.e.d.s as transmitters have been realised without imaging elements. Their total insertion loss (MUX + DEMUX) is of the order of 4 dB; their crosstalk attenuation and near-end crosstalk attenuation are 30 dB and >60 dB, respectively.

Inspec keywords: directional couplers; optical fibres; optical communication equipment; optical couplers; multiplexing equipment

Other keywords: crosstalk attenuation; LED; WDM; directional coupler; interference filter; insertion loss; wavelength division multiplexing

Subjects: Fibre optics; Switching centres and equipment; Optical communication; Optical waveguides and couplers

References

    1. 1)
      • Ishio, H.: `Wavelength-division-multiplexing transmission technology', post deadline papers III/1–4, Proceedings Opt. Comm. Conf., September 1979, Amsterdam.
    2. 2)
      • H.F. Mahlein . Wavelength-selective beam splitters with minimum polarizing effects for wavelength-division multiplexing in optical communication systems. Opt. Acta
    3. 3)
      • A. Reichelt . Improved optical tapping elements for graded-index optical fibers. Siemens Forsch.-u. Entw.-Ber. , 130 - 135
    4. 4)
      • H.F. Mahlein . Designing of edge interference filters for wavelength-division multiplex transmission over multimode optical fibers. Siemens Forsch.-u. Entw.-Ber. , 142 - 150
    5. 5)
      • G. Winzer , A. Reichelt . Wavelength-division multiplex transmission over multimode optical fibers. Siemens Forsch.-u. Entw.-Ber.
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