Abstract

Modal dispersion in plastic optical fibers with W-shaped refractive index profiles (W-shaped POFs) is investigated. The authors focus on the effect of the refractive index valley at the boundary of core and cladding on the group delay. In this paper, particularly, the relationship between the depth of the index valley and the modal dispersion is highlighted. In order to analyze the relationship precisely, the authors prepare the W-shaped POFs with a high numerical aperture (NA \sim 0.25), which are expected to show the effect of W-shaped profile more clearly than the W-shaped POFs with an NA of 0.2. As a result, the modal dispersion is strongly dependent on the depth of the index valley, which means that the control of the index valley is required, in order for minimum modal dispersion. Furthermore, by evaluating the output pulsewidth from the W-shaped POFs, the authors design the optimum index valley for the maximum bandwidth performance.

© 2006 IEEE

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  1. P. Pepeljugoski, D. Kuchta, Y. Kwark, P. Pleunis and G. Kuyt, "15.6-Gb/s transmission over 1 km of next generation multimode fiber", IEEE Photon. Technol. Lett., vol. 14, no. 5, pp. 717-719, May 2002.
  2. K. Makino, T. Ishigure and Y. Koike, "Waveguide parameter design of graded-index plastic optical fibers for bending-loss reduction", J. Lightw. Technol., vol. 24, no. 5, pp. 2108-2114, May 2006.
  3. T. Ishigure, E. Nihei and Y. Koike, "Graded-index polymer optical fiber for high speed data communication", Appl. Opt., vol. 33, no. 19, pp. 4261-4266, Jul. 1994.
  4. T. Ishigure, S. Tanaka, E. Kobayashi and Y. Koike, "Accurate refractive index profiling in a graded-Index plastic optical fiber exceeding gigabit transmission rates", J. Lightw. Technol., vol. 20, no. 8, pp. 1449-1556, Aug. 2002.
  5. T. Ishigure, H. Endo, K. Ohdoko and Y. Koike, "High-bandwidth plastic optical fiber with W-refractive index profile", IEEE Photon. Technol. Lett., vol. 16, no. 9, pp. 2081-2083, Sep. 2004.
  6. T. Ishigure, H. Endo, K. Ohdoko, K. Takahashi and Y. Koike, "Modal bandwidth enhancement in a plastic optical fiber by W-refractive index profile", J. Lightw. Technol., vol. 23, no. 4, pp. 1754-1762, Apr. 2005.
  7. K. Okamoto and T. Okoshi, "Computer-aided synthesis of the optimum refractive-index profile for a multimode fiber", IEEE Trans. Microw. Theory Tech., vol. MTT-25, no. 3, pp. 213-221, Mar. 1977.
  8. K. Oyamada and T. Okoshi, "High-accuracy numerical data of propagation characteristics of a-power graded-core fibers", IEEE Trans. Microw. Theory Tech., vol. 28, no. MTT-10, pp. 1113-1118, Oct. 1980.
  9. K. Okamoto and T. Okoshi, "Analysis of wave propagation in optical fibers having core with a-power refractive-index distribution and uniform cladding", IEEE Trans. Microw. Theory Tech., vol. MTT-24, no. 7, pp. 416-421, Jul. 1976.
  10. D. Donlagic, "Opportunities to enhance multimode fiber links by application of overfilled launch", J. Lightw. Technol., vol. 23, no. 11, pp. 3526-3540, Nov. 2005.
  11. Y. Ohtsuka and Y. Koike, "Determination of the refractive-index profile of light-focusing rods: Accuracy of a method using Interphako interference microscopy", Appl. Opt., vol. 19, no. 16, pp. 2866-2872, Aug. 1980.
  12. J. B. Schlager, M. J. Hackert, P. Pepeljugoski and F. Gwinn, "Measurements for enhanced bandwidth performance over 62.5-µm multimode fiber in short-wavelength local area networks", J. Lightw. Technol., vol. 21, no. 5, pp. 1242-1255, May 2003.
  13. K. Ohdoko, T. Ishigure and Y. Koike, "Propagating mode analysis and design of waveguide parameters of GI POF for very short-reach network use", IEEE Photon. Technol. Lett., vol. 17, no. 1, pp. 79-81, Jan. 2005.
  14. S. E. Golowich, W. White, W. A. Reed and E. Knudsen, "Quantitative estimates of mode coupling and differential modal attenuation in perfluorinated graded-index plastic optical fiber", J. Lightw. Technol., vol. 21, no. 1, pp. 111-121, Jan. 2003.
  15. T. Ishigure, Y. Koike and J. W. Fleming, "Optimum index profile of the perfluorinated polymer based GI polymer optical fiber and its dispersion properties", J. Lightw. Technol., vol. 18, no. 2, pp. 178-184, Feb. 2000.
  16. J. Arrue, J. Zubia, G. Durana and J. Mateo, "Parameters affecting bending losses in graded-index polymer optical fibers", IEEE J. Sel. Topics Quantum Electron., vol. 7, no. 5, pp. 836-844, Sep./Oct. 2001.
  17. T. Ishigure, M. Kano and Y. Koike, "Which is a more serious factor to the bandwidth of GI POF: Differential mode attenuation or mode coupling?", J. Lightw. Technol., vol. 18, no. 7, pp. 959-965, Jul. 2000.
  18. T. Ishigure, K. Ohdoko and Y. Koike, "Mode coupling control and new index profile of GI POF for restricted-launch condition in very-short reach networks", J Lightw. Technol., vol. 23, no. 12, pp. 4155-4168, Dec. 2005.
  19. D. Marcuse, "Calculation of bandwidth from index profiles of optical fibers. 1: Theory", Appl. Opt., vol. 18, no. 12, pp. 2073-2080, Jun. 1979.

Other

P. Pepeljugoski, D. Kuchta, Y. Kwark, P. Pleunis and G. Kuyt, "15.6-Gb/s transmission over 1 km of next generation multimode fiber", IEEE Photon. Technol. Lett., vol. 14, no. 5, pp. 717-719, May 2002.

K. Makino, T. Ishigure and Y. Koike, "Waveguide parameter design of graded-index plastic optical fibers for bending-loss reduction", J. Lightw. Technol., vol. 24, no. 5, pp. 2108-2114, May 2006.

T. Ishigure, E. Nihei and Y. Koike, "Graded-index polymer optical fiber for high speed data communication", Appl. Opt., vol. 33, no. 19, pp. 4261-4266, Jul. 1994.

T. Ishigure, S. Tanaka, E. Kobayashi and Y. Koike, "Accurate refractive index profiling in a graded-Index plastic optical fiber exceeding gigabit transmission rates", J. Lightw. Technol., vol. 20, no. 8, pp. 1449-1556, Aug. 2002.

T. Ishigure, H. Endo, K. Ohdoko and Y. Koike, "High-bandwidth plastic optical fiber with W-refractive index profile", IEEE Photon. Technol. Lett., vol. 16, no. 9, pp. 2081-2083, Sep. 2004.

T. Ishigure, H. Endo, K. Ohdoko, K. Takahashi and Y. Koike, "Modal bandwidth enhancement in a plastic optical fiber by W-refractive index profile", J. Lightw. Technol., vol. 23, no. 4, pp. 1754-1762, Apr. 2005.

K. Okamoto and T. Okoshi, "Computer-aided synthesis of the optimum refractive-index profile for a multimode fiber", IEEE Trans. Microw. Theory Tech., vol. MTT-25, no. 3, pp. 213-221, Mar. 1977.

K. Oyamada and T. Okoshi, "High-accuracy numerical data of propagation characteristics of a-power graded-core fibers", IEEE Trans. Microw. Theory Tech., vol. 28, no. MTT-10, pp. 1113-1118, Oct. 1980.

K. Okamoto and T. Okoshi, "Analysis of wave propagation in optical fibers having core with a-power refractive-index distribution and uniform cladding", IEEE Trans. Microw. Theory Tech., vol. MTT-24, no. 7, pp. 416-421, Jul. 1976.

D. Donlagic, "Opportunities to enhance multimode fiber links by application of overfilled launch", J. Lightw. Technol., vol. 23, no. 11, pp. 3526-3540, Nov. 2005.

Y. Ohtsuka and Y. Koike, "Determination of the refractive-index profile of light-focusing rods: Accuracy of a method using Interphako interference microscopy", Appl. Opt., vol. 19, no. 16, pp. 2866-2872, Aug. 1980.

J. B. Schlager, M. J. Hackert, P. Pepeljugoski and F. Gwinn, "Measurements for enhanced bandwidth performance over 62.5-µm multimode fiber in short-wavelength local area networks", J. Lightw. Technol., vol. 21, no. 5, pp. 1242-1255, May 2003.

K. Ohdoko, T. Ishigure and Y. Koike, "Propagating mode analysis and design of waveguide parameters of GI POF for very short-reach network use", IEEE Photon. Technol. Lett., vol. 17, no. 1, pp. 79-81, Jan. 2005.

S. E. Golowich, W. White, W. A. Reed and E. Knudsen, "Quantitative estimates of mode coupling and differential modal attenuation in perfluorinated graded-index plastic optical fiber", J. Lightw. Technol., vol. 21, no. 1, pp. 111-121, Jan. 2003.

T. Ishigure, Y. Koike and J. W. Fleming, "Optimum index profile of the perfluorinated polymer based GI polymer optical fiber and its dispersion properties", J. Lightw. Technol., vol. 18, no. 2, pp. 178-184, Feb. 2000.

J. Arrue, J. Zubia, G. Durana and J. Mateo, "Parameters affecting bending losses in graded-index polymer optical fibers", IEEE J. Sel. Topics Quantum Electron., vol. 7, no. 5, pp. 836-844, Sep./Oct. 2001.

T. Ishigure, M. Kano and Y. Koike, "Which is a more serious factor to the bandwidth of GI POF: Differential mode attenuation or mode coupling?", J. Lightw. Technol., vol. 18, no. 7, pp. 959-965, Jul. 2000.

T. Ishigure, K. Ohdoko and Y. Koike, "Mode coupling control and new index profile of GI POF for restricted-launch condition in very-short reach networks", J Lightw. Technol., vol. 23, no. 12, pp. 4155-4168, Dec. 2005.

D. Marcuse, "Calculation of bandwidth from index profiles of optical fibers. 1: Theory", Appl. Opt., vol. 18, no. 12, pp. 2073-2080, Jun. 1979.

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