Abstract

By combining theoretical, numerical, and experimental analyses, this paper examines the continuous draw process that underpins the fabrication of microstructured optical fibers (MOFs) with the aim of quantifying the impact of material properties and drawing conditions on the hole structure in the finished fiber. First, by treating the continuous draw process as a steady-state isothermal extensional flow of a Newtonian material, three-dimensional (3-D) modeling clearly demonstrates how a combination of force effects can lead to dramatic hole deformation in the neck-down region-i) surface tension contributing to hole size collapse (particularly if the fiber contains small holes and is drawn slowly over a long distance), while ii) viscous effects are the major contributor to hole shape changes (particularly in cases where different size holes are in close proximity within the overall structure). Then the central role of the neck-down region in hole deformation is examined via nonisothermal numerical analysis. Results indicate that the shape of the neck-down region is highly sensitive to the viscosity profile and thus to temperature gradients. Finally, it is shown that predicted hole deformations agree well with experimental measurements made in drawing polymethylmethacrylate MOFs.

© 2005 IEEE

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  1. S. C. Xue, R. I. Tanner, G. Barton, R. Lwin, M. C. J. Large and L. Poladian, "Fabrication of microstructured optical fibres-Part I: Problem formulation and numerical modelling of transient draw process", J. Lightw. Technol., vol. 23, no. 7, pp. 2245-2254, Jul. 2005.
  2. N. A. Issa, M. A. van Eijkelenborg, G. Henry, M. Fellew and M. C. J. Large, "Fabrication and characterization of microstructured optical fibres with elliptical holes", Opt. Lett., vol. 29, no. 12, pp. 1336-1338, Jun. 2004.
  3. A. D. Fitt, K. Furusawa, T. M. Monro and C. P. Please, "Modeling the fabrication of hollow fibers: Capillary drawing", J. Lightw. Technol., vol. 19, no. 12, pp. 1924-1931, Dec. 2001.
  4. S. C. Xue, R. I. Tanner, R. Lwin and G. Barton, "Drawing optical fibres containing holes", ZAMP, 2005.
  5. M. A. van Eijkelenborg, M. C. J. Large, A. Argyros, J. Zagari, S. Manos, N. A. Issa, I. Bassett, S. Fleming, R. C. McPhedran, C. M. de Sterke and N. A. P. Nicorovici, "Microstructured polymer optical fibre", Opt. Express, vol. 9, no. 7, pp. 319-327, Sep. 2001.
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  8. "POLYFLOW User's Manual, ver. 3.10", Fluent Inc. Centerra Resource Park, Lebanon, Sep. 2003.
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  10. J. R. A. Pearson and C. J. S. Petrie, "The flow of a tubular film-Part 1: Formal mathematical representation", J. Fluid Mech., vol. 40, no. 1, pp. 1-19, Jan. 1970.
  11. R. I. Tanner, Engineering Rheology, 2nd ed. New York: Oxford Univ. Press, 2000.

Other (11)

S. C. Xue, R. I. Tanner, G. Barton, R. Lwin, M. C. J. Large and L. Poladian, "Fabrication of microstructured optical fibres-Part I: Problem formulation and numerical modelling of transient draw process", J. Lightw. Technol., vol. 23, no. 7, pp. 2245-2254, Jul. 2005.

N. A. Issa, M. A. van Eijkelenborg, G. Henry, M. Fellew and M. C. J. Large, "Fabrication and characterization of microstructured optical fibres with elliptical holes", Opt. Lett., vol. 29, no. 12, pp. 1336-1338, Jun. 2004.

A. D. Fitt, K. Furusawa, T. M. Monro and C. P. Please, "Modeling the fabrication of hollow fibers: Capillary drawing", J. Lightw. Technol., vol. 19, no. 12, pp. 1924-1931, Dec. 2001.

S. C. Xue, R. I. Tanner, R. Lwin and G. Barton, "Drawing optical fibres containing holes", ZAMP, 2005.

M. A. van Eijkelenborg, M. C. J. Large, A. Argyros, J. Zagari, S. Manos, N. A. Issa, I. Bassett, S. Fleming, R. C. McPhedran, C. M. de Sterke and N. A. P. Nicorovici, "Microstructured polymer optical fibre", Opt. Express, vol. 9, no. 7, pp. 319-327, Sep. 2001.

M. A. van Eijkelenborg, A. Argyros, G. Barton, I. Bassett, M. Fellew, G. Henry, N. A. Issa, M. C. J. Large, S. Manos, W. Padden, L. Poladian and J. Zagari, "Recent progress in microstructured polymer optical fibre fabrication and characterisation", Opt. Fiber Technol., vol. 9, no. 4, pp. 199-209, Apr. 2003.

J. C. Knight, T. A. Birks, R. F. Russsell and D. M. Atkins, "All silica single-mode optical fiber with photonic crystal cladding", Opt. Lett., vol. 21, no. 19, pp. 1547-1549, Oct. 1996.

"POLYFLOW User's Manual, ver. 3.10", Fluent Inc. Centerra Resource Park, Lebanon, Sep. 2003.

S. G. Leon-Saval, T. A. Birks, W. J. Wadsworth and P. S. J. Russell, "Supercontinuum generation in submicron fibre waveguides", Opt. Express, vol. 12, no. 13, pp. 2864-2869, Jun. 2004.

J. R. A. Pearson and C. J. S. Petrie, "The flow of a tubular film-Part 1: Formal mathematical representation", J. Fluid Mech., vol. 40, no. 1, pp. 1-19, Jan. 1970.

R. I. Tanner, Engineering Rheology, 2nd ed. New York: Oxford Univ. Press, 2000.

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