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Transfer function of a multimode step-index fibre: a geometrical optical investigation

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Abstract

The transfer function of a multimode step-index fibre has been calculated by means of geometrical optics taking into account mode coupling and leaky rays. The light source may have axial symmetry (light emitting diode) or be line shaped (semiconductor laser). Radial displacement of the line source relative to the fibre axis is allowed. Calculations performed for a large numerical aperture fibre (N.A.=0.475) with a coupling length of 2 km show that leaky rays and radial displacement of the line source are significant for fibre lengths shorter than 200m. The influence of the width of the entrance beam is significant for lengths up to 5 km.

Varying coupling length and steady state angle for a fibre length of 150 m calculations show that the bandwidth varies between 15 and 95 MHz for penalty losses between 8 and 18 dB.

Calculations have been compared with direct baseband frequency measurements for a high-loss fibre with a large numerical aperture and excellent agreement has been found.

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References

  1. D. Gloge,Bell. Syst. Tech. J. 51 (1972) 1767–83.

    Google Scholar 

  2. Idem, ibid 52 (1973) 801–16.

    Google Scholar 

  3. F. Albertin, P. Di Vita andR. Vannucci,Opto-Electronics 6 (1974) 369–86.

    Google Scholar 

  4. A. W. Snyder,Appl. Phys. 4 (1974) 273–98.

    Google Scholar 

  5. G. Jacobsen andJ. J. Ramskov Hansen,Opt. Commun. 19 (1976) 302–4.

    Google Scholar 

  6. W. A. Gambling, D. N. Payne andH. Matsumura,Appl. Opt. 14 (1975) 1538–42.

    Google Scholar 

  7. A. W. Snyder andC. Pask,Opt. Commun. 15 (1975) 314–6.

    Google Scholar 

  8. W. A. Gambling, D. N. Payne andH. Matsumura,Radio Elec. Eng. 11 (1973) 683–8.

    Google Scholar 

  9. H. R. D. Sunak andW. A. Gambling,Opt. Commun. 11 (1974) 277–81.

    Google Scholar 

  10. M. Horiguchi andH. Osanai,Elect. Lett. 12 (1976) 310–2.

    Google Scholar 

  11. R. J. Morgan,ibid 12 (1976) 383–4.

    Google Scholar 

  12. K. Bundgaard Jensen, J.J. Ramskov Hansen andG. Jacobsen,Nordic Laser and Electro-Optics Conference, Gothenburg, Sweden, 10–12, August 1976.

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Authors and Affiliations

  1. Electromagnetics Institute, Technical University of Denmark, DK-2800, Lyngby, Denmark

    G. Jacobsen & J. J. Ramskov Hansen

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  1. G. Jacobsen
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  2. J. J. Ramskov Hansen
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Jacobsen, G., Ramskov Hansen, J.J. Transfer function of a multimode step-index fibre: a geometrical optical investigation. Opt Quant Electron 9, 289–297 (1977). https://doi.org/10.1007/BF00619528

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