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Side-tunnel fibre: an approach to polarisation-maintaining optical waveguiding scheme

Side-tunnel fibre: an approach to polarisation-maintaining optical waveguiding scheme

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© The Institution of Electrical Engineers
Published

A new type of polarisation-maintaining fibre is proposed, analysed, and preliminary fabrication and measurement are described. The new fibre features two ‘side tunnels’ bored on both sides of the core, and exhibits an absolutely single-polarisation characteristic or a relatively strong modal birefringence. The normalised birefringence obtained so far is 0.73×10−4. This value is appreciably lower than expected. Two possible reasons are discussed.

Inspec keywords: optical fibres; light polarisation; birefringence

Other keywords: modal birefringence; polarisation-maintaining optical waveguiding; side tunnel fibre; core

Subjects: Fibre optics and fibre waveguides; Fibre optics

References

    1. 1)
      • K. Oyamada , T. Okoshi . Two-dimensional finite-element method calculation of propagation characteristics of axially non-symmetrical optical fibers. Radio Sci. , 109 - 116
    2. 2)
      • T. Hosaka , K. Okamoto , Y. Sasaki , T. Edahiro . Single-mode fibres with asymmetrical refractive-index pits on both sides of core. Electron. Lett. , 191 - 193
    3. 3)
      • T. Okoshi . Single-polarization single-mode optical fibers. IEEE J. Quantum Electron. , 879 - 884
    4. 4)
      • T. Okoshi , K. Oyamada . Single-polarisation single-mode optical fibre with refractive-index pits on both sides of the core. Electron. Lett. , 712 - 713
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