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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 70, Iss. 1 — Jan. 1, 1980
  • pp: 40–48

Scattering from an off-axis inhomogeneity in step-index optical fibers: radiation loss

A. Safaai-Jazi and G. L. Yip  »View Author Affiliations


JOSA, Vol. 70, Issue 1, pp. 40-48 (1980)
http://dx.doi.org/10.1364/JOSA.70.000040


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Abstract

An exact analysis using the Green’s function formulation of an arbitrarily oriented off-axis dipole in a three-layer cylindrical dielectric waveguide is carried out. The practical significance of such a formulation is illustrated by its immediate application to the problem of radiation due to scattering from an arbitrarily located discrete inhomogeneity in step-index fibers in which the dominant HE1 1 mode propagates. For small dielectric differences between the adjacent layers, the analysis yields radiation loss that agrees well with that evaluated from the infinite-medium approximation. However, the spatial distribution of the radiation loss differs markedly from that predicted by the infinite-medium approximation.

© 1980 Optical Society of America

Citation
A. Safaai-Jazi and G. L. Yip, "Scattering from an off-axis inhomogeneity in step-index optical fibers: radiation loss," J. Opt. Soc. Am. 70, 40-48 (1980)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-70-1-40


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References

  1. F. R. Kapron, D. E. Keck, and R. D. Maurer, "Radiation losses in glass optical waveguides," IEE Conf. Publ. London 71, 148–153, (1970).
  2. J. W. Duncan, "The efficiency of excitation of a surface mode on a dielectric cylinder," IRE Trans. MTT-7, 257–268 (1959).
  3. J. Brown and H. Stachera, "The launching of an axial cylindrical surface wave," Proc. IEEE 109C, 18–25 (1962).
  4. A. W. Snyder, "Excitation and scattering of modes on a dielectric rod or optical fiber," IEEE Trans. MTT-17, No. 12, 1138–1144 (1969).
  5. P. J. B. Clarricoats and K. B. Chan, "Propagation behavior of cylindrical dielectric-rod waveguides," Proc. IEEE 120, No. 11, 1371–1378 (1973).
  6. C. L. Yip, "Launching efficiency of the HE1 1surface wave mode on a dielectric rod," IEEE Trans. MTT-18, No. 12, 1033–1041 (1970).
  7. G. L. Yip and J. Martucci, "Scattering from a localized inhomogeneity in a cladded fiber optical waveguide. I: radiation loss," Appl. Opt 17, 2131–2136 (1976).
  8. G. N. Watson, A Treatise on the Theory of Bessel Functions (Cambridge University, Cambridge, England, 1968), p. 361.
  9. A. Safaai-Jazi, "A study of mode classification and scattering from an off-axis inhomogeneity in step-index optical fiber," Doctoral dissertation, Dept. of E. E., McGill University, Ch. 4, May, 1978 (unpublished).
  10. Reference 9, Chap. 5.
  11. A. Safaai-Jazi and G. L. Yip, "Scattering from an arbitrarily located off-axis inhomogeneity in a step-index optical fiber," IEEE-MTT-S International Microwave Symposium, Session on "Fiber and Integrated Optics," Digest, 113–115 (June, 1978).
  12. S. Kawakami and S. Nishida, "Characteristics of a doubly-clad optical fiber with a low-index inner cladding," IEEE Trans. J. Quantum Electron. QE-10, 879–887, (1974).
  13. A. R. Tynes, A. D. Pearson, and D. L. Bisbee, "Loss mechanisms and measurements in clad glass fibers and bulk glass," J. Opt. Soc. Am. 61, 143–153, (1971).

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