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Vector modes of six-port couplers

Vector modes of six-port couplers

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© The Institution of Electrical Engineers
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The polarisation patterns for the first six vector modes of six-port couplers with either ideal equilateral or nonideal isosceles cross-sections are determined using formal perturbation theory. They are shown to bear a close similarity with the corresponding modal patterns of a circularly symmetric fibre or an elliptical fibre, respectively.

Inspec keywords: optical couplers; fibre optics; optical waveguide theory

Other keywords: six-port fibre coupler; nonideal isosceles cross-sections; formal perturbation theory; polarisation patterns; evanescent coupling; first six vector modes; equilateral triangle; scalar modes; unbounded cladding

Subjects: Fibre optics; Waveguide and cavity theory; Fibre optics and fibre waveguides

References

    1. 1)
      • S.K. Sheem . Optical fiber interferometers with [3 × 3] directional couplers: analysis. J. Appl. Phys. , 3865 - 3872
    2. 2)
      • A.W. Snyder , J.D. Love . (1983) , Optical waveguide theory.
    3. 3)
      • R.J. Black , L. Gagnon , R.C. Youngquist , R.H. Wentworth . Modes of evanescent 3×3 couplers and three-core fibres. Electron. Lett. , 1311 - 1313
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