Abstract

In this paper, the authors introduce local periodic perturbations of the cladding refractive index in the reduced diameter (waist) region of biconically tapered single-mode optical fibers by two methods. The first was focused ion beam milling to give short grooves perpendicular to the fiber axis, and the second was boron implantation, giving a phase grating in the cladding. Both structures exhibit a wavelength-dependent throughput and are highly sensitive to the environment in the waist region, which makes them potentially applicable in optical communication networks as well as in sensors. A simple corrugated slab-waveguide model is able to account for the measured spectral transmission of these structures.

© 2004 IEEE

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  1. V. S. Berikashvili, A. A. Gordeev, A. P. Gorchakov and A. P. Zhilinsky, "CO2 -laser-fused biconical couplers", Telecommun. Radio Eng., vol. 46, no. 1, pp. 13-15, Jan. 1991.
  2. W. Henry, "Use of tapered optical fibers as evanescent field sensors", in Proc. Chemical, Biochemical and Environmental Fiber Sensors VI (SPIE), vol. 2293, 1994, pp. 2-14.
  3. K. Morishita and K. Aso, "Fiber loop polarizers using a fused taper coupler", J. Lightwave Technol., vol. 12, pp. 634-637, Apr. 1994 .
  4. M. Eisenmann and E. Weidel, "Single-mode fused biconical coupler optimized for polarization beamsplitting", J. Lightwave Technol., vol. 9, pp. 853-858, July 1991.
  5. A. W. Snyder and J. D. Love, Optical Waveguide Theory, London: U.K.: Chapman & Hall, 1983, ch. 28.
  6. A. Yariv, Optical Electronics in Modern Communications, New York: Oxford Univ. Press, 1997, ch. 13.

J. Lightwave Technol. (2)

K. Morishita and K. Aso, "Fiber loop polarizers using a fused taper coupler", J. Lightwave Technol., vol. 12, pp. 634-637, Apr. 1994 .

M. Eisenmann and E. Weidel, "Single-mode fused biconical coupler optimized for polarization beamsplitting", J. Lightwave Technol., vol. 9, pp. 853-858, July 1991.

Other (4)

A. W. Snyder and J. D. Love, Optical Waveguide Theory, London: U.K.: Chapman & Hall, 1983, ch. 28.

A. Yariv, Optical Electronics in Modern Communications, New York: Oxford Univ. Press, 1997, ch. 13.

V. S. Berikashvili, A. A. Gordeev, A. P. Gorchakov and A. P. Zhilinsky, "CO2 -laser-fused biconical couplers", Telecommun. Radio Eng., vol. 46, no. 1, pp. 13-15, Jan. 1991.

W. Henry, "Use of tapered optical fibers as evanescent field sensors", in Proc. Chemical, Biochemical and Environmental Fiber Sensors VI (SPIE), vol. 2293, 1994, pp. 2-14.

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