Effect of dip in the referctive index on the cut-off frequency of a single-mode fibre

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Effect of dip in the referctive index on the cut-off frequency of a single-mode fibre

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© The Institution of Electrical Engineers
Published

The normalised frequency for single-mode cut-off in an optical fibre has been calculated as a function of the dip in the refractive index at the centre of the core. For a particular class of profiles, dip width up to 40% have a negligible effect on the propagation characteristics.

Inspec keywords: refractive index; optical fibres

Other keywords: dip effect; single mode fibre; cut off frequency; refractive index; dip widths; optical fibre; propagation characteristics

Subjects: Fibre optics; Fibre optics and fibre waveguides

References

    1. 1)
      • H. Matsumra . , Cut-off normalized frequency in radially inhomogeneous single-mode fibre.
    2. 2)
      • W.A. Gambling , D.N. Payne , C.R. Hammond , S.R. Norman . Optical fibres based on phosphosilicate glass. Proc. IEE , 6 , 570 - 576
    3. 3)
      • W.A. Gambling , D.N. Payne , H. Matsumura . Determination of core diameter and refractive-index difference of single-mode fibres by observation of the far-field pattern. MOA , 13 - 17
    4. 4)
      • R.H. Stolen . Modes in fibre optical waveguides with ring index profile. Appl. Opt. , 1533 - 1537
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