Robust evanescent fused tapered couplers

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Robust evanescent fused tapered couplers

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In the ubiquitous fused tapered coupler the two processes of fusing and tapering are achieved in a single processing step. This leads to a longitudinal variation in the coupler cross-section, from a figure-of-eight at the extremities to anything between this figure-of-eight and a full circle at the middle of the taper waist. Through separation of the fusing and tapering processes, a new coupler type is reported. This coupler has a predominantly evanescent mode of coupling being shorter and fatter (more robust) than its conventional tapered counterpart.

Inspec keywords: optical fibre losses; optical fibre couplers

Other keywords: robust evanescent fused tapered couplers; coupler cross-section; taper waist

Subjects: Fibre optics; Optical propagation, dispersion and attenuation in fibres; Fibre couplers and connectors

References

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      • J. Bures , S. Lacroix , J. Lapierre . Analyse d'un coupleur bidirectionnel à fibres optiques monomodes fusionnées. Appl. Opt. , 12 , 1918 - 1922
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      • J.D. Love . Application of a low-loss criterion to optical waveguides and devices. IEE Proc. J. Optoelectron. , 4 , 225 - 228
    3. 3)
      • M.J.F. Digonnet , H.J. Shaw . Analysis of a tunable single mode optical fiber coupler. IEEE J. Quantum Electron. , 4 , 746 - 754
    4. 4)
      • C.V. Cryan , C.D. Hussey . Fused polished singlemode fibre couplers. Electron. Lett. , 2 , 204 - 205
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      • A.W. Snyder , J.D. Love . (1983) Optical waveguide theory.
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