Abstract

Efficient and selective coupling between a single-mode fiber and the LP11 mode of a double-mode fiber is demonstrated in an evanescent directional coupler. With greater than 90% coupling to the LP11 mode, suppression of the coupled power to the lower-order LP01 mode was measured to be at least 24 dB. This device has application as a modal filter for the construction of in-line all-fiber optical components.

© 1986 Optical Society of America

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References

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    [Crossref] [PubMed]
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    [Crossref] [PubMed]
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    [Crossref]
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    [Crossref] [PubMed]
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    [Crossref]
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    [Crossref]
  8. P. Bassi, G. Falciasecca, M. Zoboli, “Experimental results on coupling between optical fibers operating in low multimode regime,” presented at the Fifth National Reunion of Applied Electromagnetism, St. Vincent, Italy, 1984.
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    [Crossref]
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    [Crossref] [PubMed]
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    [Crossref]
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    [Crossref] [PubMed]
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    [Crossref]

1986 (3)

1985 (2)

1984 (2)

1980 (2)

R. A. Bergh, G. Kotler, H. J. Shaw, Electron. Lett. 16, 260 (1980).
[Crossref]

H. C. Lefevre, Electron. Lett. 16, 778 (1980).
[Crossref]

1977 (1)

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[Crossref]

1973 (1)

A. Yariv, IEEE J. Quantum Electron. QE-9, 919 (1973).
[Crossref]

1971 (1)

Bassi, P.

P. Bassi, G. Falciasecca, M. Zoboli, “Experimental results on coupling between optical fibers operating in low multimode regime,” presented at the Fifth National Reunion of Applied Electromagnetism, St. Vincent, Italy, 1984.

Bergh, R. A.

R. A. Bergh, G. Kotler, H. J. Shaw, Electron. Lett. 16, 260 (1980).
[Crossref]

Blake, J. N.

Brooks, J. L.

Engan, H. E.

Falciasecca, G.

P. Bassi, G. Falciasecca, M. Zoboli, “Experimental results on coupling between optical fibers operating in low multimode regime,” presented at the Fifth National Reunion of Applied Electromagnetism, St. Vincent, Italy, 1984.

Gloge, D.

Hill, K. O.

R. G. Lamont, K. O. Hill, D. C. Johnson, Opt. Lett. 10, 46 (1985).
[Crossref] [PubMed]

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[Crossref]

Johnson, D. C.

R. G. Lamont, K. O. Hill, D. C. Johnson, Opt. Lett. 10, 46 (1985).
[Crossref] [PubMed]

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[Crossref]

Kawasaki, B. S.

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[Crossref]

Kim, B. Y.

Kotler, G.

R. A. Bergh, G. Kotler, H. J. Shaw, Electron. Lett. 16, 260 (1980).
[Crossref]

Lamont, R. G.

Lefevre, H. C.

H. C. Lefevre, Electron. Lett. 16, 778 (1980).
[Crossref]

Shaw, H. J.

Sorin, W. V.

Taylor, H. F.

H. F. Taylor, IEEE J. Lightwave Technol. LT-2, 617 (1984).
[Crossref]

Whalen, M. S.

M. S. Whalen, T. H. Wood, Electron. Lett. 21, 175 (1985).
[Crossref]

Wood, T. H.

M. S. Whalen, T. H. Wood, Electron. Lett. 21, 175 (1985).
[Crossref]

Yariv, A.

A. Yariv, IEEE J. Quantum Electron. QE-9, 919 (1973).
[Crossref]

Youngquist, R. C.

Zoboli, M.

P. Bassi, G. Falciasecca, M. Zoboli, “Experimental results on coupling between optical fibers operating in low multimode regime,” presented at the Fifth National Reunion of Applied Electromagnetism, St. Vincent, Italy, 1984.

Appl. Opt. (1)

Appl. Phys. Lett. (1)

K. O. Hill, B. S. Kawasaki, D. C. Johnson, Appl. Phys. Lett. 31, 740 (1977).
[Crossref]

Electron. Lett. (3)

R. A. Bergh, G. Kotler, H. J. Shaw, Electron. Lett. 16, 260 (1980).
[Crossref]

M. S. Whalen, T. H. Wood, Electron. Lett. 21, 175 (1985).
[Crossref]

H. C. Lefevre, Electron. Lett. 16, 778 (1980).
[Crossref]

IEEE J. Lightwave Technol. (1)

H. F. Taylor, IEEE J. Lightwave Technol. LT-2, 617 (1984).
[Crossref]

IEEE J. Quantum Electron. (1)

A. Yariv, IEEE J. Quantum Electron. QE-9, 919 (1973).
[Crossref]

Opt. Lett. (5)

Other (1)

P. Bassi, G. Falciasecca, M. Zoboli, “Experimental results on coupling between optical fibers operating in low multimode regime,” presented at the Fifth National Reunion of Applied Electromagnetism, St. Vincent, Italy, 1984.

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Figures (4)

Fig. 1
Fig. 1

Relative index profiles for single-mode fiber (SMF) and double-mode fiber (DMF) showing phase-velocity matching between LP01 and LP11 modes. Dashed lines indicate values of effective indices for the guided modes.

Fig. 2
Fig. 2

Experimental arrangement used in measuring parameters of the evanescent modal filter. Input LP01 mode is coupled to output LP11 mode.

Fig. 3
Fig. 3

Coupled (DMF) and uncoupled (SMF) outputs from the modal coupler. Coupling is adjusted to approximately 50%; wavelength is 488.0 nm.

Fig. 4
Fig. 4

Double-mode fiber outputs for coupling efficiencies greater than 90%. Mode shapes (a) through (c) resulted as coupling fibers were translated with respect to each other.

Equations (1)

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P c = P 0 sin 2 [ κ 2 + ( Δ β / 2 ) 2 ] 1 / 2 L 1 + ( Δ β / 2 κ ) 2 ,

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