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Effectively nonreciprocal evanescent-wave optical-fibre directional coupler

Effectively nonreciprocal evanescent-wave optical-fibre directional coupler

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© The Institution of Electrical Engineers
Published

An effectively nonreciprocal directional coupler has been demonstrated using evanescent coupling between a single-mode and a multimode optical fibre. At least 17 dB difference in coupling efficiency between transmit and receive branches has been measured. The near-field mode patterns show coupling between the single-mode fibre and a few high-order modes of the multimode fibre.

Inspec keywords: optical couplers; optical fibres

Other keywords: single-mode fibre; multimode optical fibre; nonreciprocal directional coupler; near-field mode patterns; coupling efficiency; evanescent coupling

Subjects: Fibre optics and fibre waveguides; Fibre optics

References

    1. 1)
      • M.J.F. Digonnet , H.J. Shaw . Analysis of a tunable single-mode optical fiber coupler. IEEE J. Quantum Electron. , 746 - 754
    2. 2)
      • M.J.F. Digonnet , H.J. Shaw . Wavelength multiplexing in single-mode fiber couplers. Appl. Opt. , 484 - 491
    3. 3)
      • M.R. Finley . Optical fibers in local area networks. IEEE Commun. , 22 - 35
    4. 4)
      • R.A. Bergh , G. Kotler , H.J. Shaw . Single-mode fibre optic directional coupler. Electron. Lett. , 260 - 261
    5. 5)
      • T.H. Wood . Increased power injection in multimode optical fiber busses through mode-selective coupling. J. Lightwave Technol.
    6. 6)
      • R. Levy , L. Young . (1966) Directional couplers, Advances in microwaves Vol. 1.
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