Abstract

Mode and wavelength filtering characteristics of biconical fibers are examined. A model is considered which simulates the propagation conditions in a bicone made in a slightly overmoded fiber when illuminated at two different wavelengths. The possibility of wavelength selective coupling is evident in view of different applications.

© 1989 Optical Society of America

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References

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  1. T. Ozeki, T. Ito, T. Tamura, “Tapered Section of Multimode Cladded Fibers as Mode Filters and Mode Analyzers,” Appl. Phys. Lett. 26, 386 (1975).
    [CrossRef]
  2. D. T. Cassidy, D. C. Johnson, K. O. Hill, “Wavelength Dependent Transmission of Monomode Optical Fiber Tapers,” Appl. Opt. 24, 945 (1985).
    [CrossRef] [PubMed]
  3. S. Lacroix, F. Gonthier, J. Bures, “All-Fiber Wavelength Filter from Successive Biconical Tapers,” Opt. Lett. 11, 671 (1986).
    [CrossRef] [PubMed]
  4. W. V. Sorin, B. Y. Kim, H. J. Shaw, “Highly Selective Evanescent Modal Filter for Two-Mode Optical Fibers,” Opt. Lett. 11, 581 (1986).
    [CrossRef] [PubMed]
  5. A. M. Scheggi, P. F. Checcacci, R. Falciai, “Dispersion Characteristics in Quasi-Step and Graded-Index Slab Waveguides by Ray-Tracing Technique,” J. Opt. Soc. Am. 65, 1022 (1975).
    [CrossRef]
  6. See, for example, S. J. Maurer, L. B. Felsen, “Ray-Optical Techniques for Guided Waves,” Proc. IEEE 55, 1718 (1967).
    [CrossRef]

1986

1985

1975

A. M. Scheggi, P. F. Checcacci, R. Falciai, “Dispersion Characteristics in Quasi-Step and Graded-Index Slab Waveguides by Ray-Tracing Technique,” J. Opt. Soc. Am. 65, 1022 (1975).
[CrossRef]

T. Ozeki, T. Ito, T. Tamura, “Tapered Section of Multimode Cladded Fibers as Mode Filters and Mode Analyzers,” Appl. Phys. Lett. 26, 386 (1975).
[CrossRef]

1967

See, for example, S. J. Maurer, L. B. Felsen, “Ray-Optical Techniques for Guided Waves,” Proc. IEEE 55, 1718 (1967).
[CrossRef]

Bures, J.

Cassidy, D. T.

Checcacci, P. F.

Falciai, R.

Felsen, L. B.

See, for example, S. J. Maurer, L. B. Felsen, “Ray-Optical Techniques for Guided Waves,” Proc. IEEE 55, 1718 (1967).
[CrossRef]

Gonthier, F.

Hill, K. O.

Ito, T.

T. Ozeki, T. Ito, T. Tamura, “Tapered Section of Multimode Cladded Fibers as Mode Filters and Mode Analyzers,” Appl. Phys. Lett. 26, 386 (1975).
[CrossRef]

Johnson, D. C.

Kim, B. Y.

Lacroix, S.

Maurer, S. J.

See, for example, S. J. Maurer, L. B. Felsen, “Ray-Optical Techniques for Guided Waves,” Proc. IEEE 55, 1718 (1967).
[CrossRef]

Ozeki, T.

T. Ozeki, T. Ito, T. Tamura, “Tapered Section of Multimode Cladded Fibers as Mode Filters and Mode Analyzers,” Appl. Phys. Lett. 26, 386 (1975).
[CrossRef]

Scheggi, A. M.

Shaw, H. J.

Sorin, W. V.

Tamura, T.

T. Ozeki, T. Ito, T. Tamura, “Tapered Section of Multimode Cladded Fibers as Mode Filters and Mode Analyzers,” Appl. Phys. Lett. 26, 386 (1975).
[CrossRef]

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Figures (5)

Fig. 1
Fig. 1

Geometric configurations of (a) the uniform slab and (b) the linear taper waveguide.

Fig. 2
Fig. 2

Mode ray congruences and radiated beams along a taper with a2/a1 = 0.7 for λ = 0.85 μm .

Fig. 3
Fig. 3

Experimental setup for near-field measurements.

Fig. 4
Fig. 4

Set of mode patterns observed at the output of (a) SM10 and (b) SM6 fibers.

Fig. 5
Fig. 5

Beams emerging from the taper (SM10 fiber) corresponding to cutoff modes (LP02, LP21, LP31).

Equations (4)

Equations on this page are rendered with MathJax. Learn more.

a + a k sin α d x = ( μ + 1 2 ) π ; k = 2 π n / λ ,
2 a k sin α = ( μ + ½ ) π ; k 1 = 2 π n 1 / λ .
α = α + 2 N Ω ,
α μ = a 2 / a 1 α μ .

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