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Biconical taper coaxial coupler filter

Biconical taper coaxial coupler filter

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© The Institution of Electrical Engineers
Published

The wavelength-dependent transmission characteristics of biconical tapers fabricated from single-mode fibres of depressed cladding are examined. The wavelength response is found to be oscillatory with large modulation depths. We describe here a simple fabrication technique which produces narrow passband filters of low loss and high extinction ratio (>30dB).

Inspec keywords: optical filters; optical fibres; band-pass filters; optical workshop techniques; optical couplers

Other keywords: narrow passband filters; coaxial coupler filter; wavelength-dependent transmission characteristics; optical fibres; fabrication technique; biconical tapers; large modulation depths; single-mode fibres; high extinction ratio; low loss; depressed cladding

Subjects: Optical fabrication, surface grinding; Fibre optics; Spectral and other filters; Optical coatings and filters; Fibre optics and fibre waveguides

References

    1. 1)
      • A.C. Boucouvalas , G. Georgiou . Biconical taper coaxial optical fibre coupler. Electron. Lett. , 864 - 865
    2. 2)
      • Boucouvalas, A.C.: `Coaxial optical fibres', 1982, Ph.D. thesis, Imperial College, Electrical Engineering Department, London.
    3. 3)
      • J.R. Cozens , A.C. Boucouvalas , A. Al-Assam , M.J. Lee , D.G. Morris . Optical coupling in coaxial fibres. Electron. Lett. , 679 - 681
    4. 4)
      • Boucouvalas, A.c., Georgiou, G.: `Tapering single mode optical fibres', To be presented at IOOC-ECOC '85, 1985, .
    5. 5)
      • A.W. Snyder , J.D. Love . (1983) Optical waveguide theory, Chapman & Hall.
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