Abstract

Low-loss asymmetrical single-mode fiber wavelength-selective directional couplers are fabricated at low cost. Proper control of the remaining cladding thickness and the interaction length of the half-couplers produces exactly the required bandwidth and center wavelength of the filter. Increasing the interaction length reduces the bandwidth and the sidelobes. Calculated values show good agreement with the experimental results.

© 1994 Optical Society of America

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References

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  1. R. Zengerle, O. G. Leminger, J. Lightwave Technol. LT-4, 823 (1986).
    [CrossRef]
  2. O. Leminger, R. Zengerle, Electron. Lett. 23, 241 (1987).
    [CrossRef]
  3. D. Marcuse, Electron. Lett. 21, 726 (1985).
    [CrossRef]
  4. M. S. Whalen, K. L. Walker, Electron. Lett. 21, 724 (1985).
    [CrossRef]
  5. C. D. Hussey, J. D. Minelly, Electron. Lett. 24, 805 (1988).
    [CrossRef]
  6. A. K. Das, A. K. Mondal, M. Pandit, Proc. Soc. Photo-Opt. Instrum. Eng. 1572, 572 (1991).
  7. C. V. Cryan, C. D. Hussey, Electron. Lett. 28, 204 (1992).
    [CrossRef]
  8. R. B. Dyott, J. Bello, Electron. Lett. 19, 601 (1983).
    [CrossRef]
  9. G. Schiffner, H. Schneider, G. Schoner, Appl. Phys. 23, 41 (1980).
    [CrossRef]
  10. A. W. Snyder, J. D. Love, Optical Waveguide Theory (Chapman & Hall, New York, 1983), p. 570.
  11. A. K. Das, M. A. Mondal, A. Mukherjee, A. K. Mondal, Opt. Lett. 19, 384 (1994).
    [PubMed]
  12. A. K. Das, S. Bhattacharyya, J. Lightwave Technol. LT-3, 83 (1985).
    [CrossRef]

1994 (1)

1992 (1)

C. V. Cryan, C. D. Hussey, Electron. Lett. 28, 204 (1992).
[CrossRef]

1991 (1)

A. K. Das, A. K. Mondal, M. Pandit, Proc. Soc. Photo-Opt. Instrum. Eng. 1572, 572 (1991).

1988 (1)

C. D. Hussey, J. D. Minelly, Electron. Lett. 24, 805 (1988).
[CrossRef]

1987 (1)

O. Leminger, R. Zengerle, Electron. Lett. 23, 241 (1987).
[CrossRef]

1986 (1)

R. Zengerle, O. G. Leminger, J. Lightwave Technol. LT-4, 823 (1986).
[CrossRef]

1985 (3)

D. Marcuse, Electron. Lett. 21, 726 (1985).
[CrossRef]

M. S. Whalen, K. L. Walker, Electron. Lett. 21, 724 (1985).
[CrossRef]

A. K. Das, S. Bhattacharyya, J. Lightwave Technol. LT-3, 83 (1985).
[CrossRef]

1983 (1)

R. B. Dyott, J. Bello, Electron. Lett. 19, 601 (1983).
[CrossRef]

1980 (1)

G. Schiffner, H. Schneider, G. Schoner, Appl. Phys. 23, 41 (1980).
[CrossRef]

Bello, J.

R. B. Dyott, J. Bello, Electron. Lett. 19, 601 (1983).
[CrossRef]

Bhattacharyya, S.

A. K. Das, S. Bhattacharyya, J. Lightwave Technol. LT-3, 83 (1985).
[CrossRef]

Cryan, C. V.

C. V. Cryan, C. D. Hussey, Electron. Lett. 28, 204 (1992).
[CrossRef]

Das, A. K.

A. K. Das, M. A. Mondal, A. Mukherjee, A. K. Mondal, Opt. Lett. 19, 384 (1994).
[PubMed]

A. K. Das, A. K. Mondal, M. Pandit, Proc. Soc. Photo-Opt. Instrum. Eng. 1572, 572 (1991).

A. K. Das, S. Bhattacharyya, J. Lightwave Technol. LT-3, 83 (1985).
[CrossRef]

Dyott, R. B.

R. B. Dyott, J. Bello, Electron. Lett. 19, 601 (1983).
[CrossRef]

Hussey, C. D.

C. V. Cryan, C. D. Hussey, Electron. Lett. 28, 204 (1992).
[CrossRef]

C. D. Hussey, J. D. Minelly, Electron. Lett. 24, 805 (1988).
[CrossRef]

Leminger, O.

O. Leminger, R. Zengerle, Electron. Lett. 23, 241 (1987).
[CrossRef]

Leminger, O. G.

R. Zengerle, O. G. Leminger, J. Lightwave Technol. LT-4, 823 (1986).
[CrossRef]

Love, J. D.

A. W. Snyder, J. D. Love, Optical Waveguide Theory (Chapman & Hall, New York, 1983), p. 570.

Marcuse, D.

D. Marcuse, Electron. Lett. 21, 726 (1985).
[CrossRef]

Minelly, J. D.

C. D. Hussey, J. D. Minelly, Electron. Lett. 24, 805 (1988).
[CrossRef]

Mondal, A. K.

A. K. Das, M. A. Mondal, A. Mukherjee, A. K. Mondal, Opt. Lett. 19, 384 (1994).
[PubMed]

A. K. Das, A. K. Mondal, M. Pandit, Proc. Soc. Photo-Opt. Instrum. Eng. 1572, 572 (1991).

Mondal, M. A.

Mukherjee, A.

Pandit, M.

A. K. Das, A. K. Mondal, M. Pandit, Proc. Soc. Photo-Opt. Instrum. Eng. 1572, 572 (1991).

Schiffner, G.

G. Schiffner, H. Schneider, G. Schoner, Appl. Phys. 23, 41 (1980).
[CrossRef]

Schneider, H.

G. Schiffner, H. Schneider, G. Schoner, Appl. Phys. 23, 41 (1980).
[CrossRef]

Schoner, G.

G. Schiffner, H. Schneider, G. Schoner, Appl. Phys. 23, 41 (1980).
[CrossRef]

Snyder, A. W.

A. W. Snyder, J. D. Love, Optical Waveguide Theory (Chapman & Hall, New York, 1983), p. 570.

Walker, K. L.

M. S. Whalen, K. L. Walker, Electron. Lett. 21, 724 (1985).
[CrossRef]

Whalen, M. S.

M. S. Whalen, K. L. Walker, Electron. Lett. 21, 724 (1985).
[CrossRef]

Zengerle, R.

O. Leminger, R. Zengerle, Electron. Lett. 23, 241 (1987).
[CrossRef]

R. Zengerle, O. G. Leminger, J. Lightwave Technol. LT-4, 823 (1986).
[CrossRef]

Appl. Phys. (1)

G. Schiffner, H. Schneider, G. Schoner, Appl. Phys. 23, 41 (1980).
[CrossRef]

Electron. Lett. (6)

C. V. Cryan, C. D. Hussey, Electron. Lett. 28, 204 (1992).
[CrossRef]

R. B. Dyott, J. Bello, Electron. Lett. 19, 601 (1983).
[CrossRef]

O. Leminger, R. Zengerle, Electron. Lett. 23, 241 (1987).
[CrossRef]

D. Marcuse, Electron. Lett. 21, 726 (1985).
[CrossRef]

M. S. Whalen, K. L. Walker, Electron. Lett. 21, 724 (1985).
[CrossRef]

C. D. Hussey, J. D. Minelly, Electron. Lett. 24, 805 (1988).
[CrossRef]

J. Lightwave Technol. (2)

R. Zengerle, O. G. Leminger, J. Lightwave Technol. LT-4, 823 (1986).
[CrossRef]

A. K. Das, S. Bhattacharyya, J. Lightwave Technol. LT-3, 83 (1985).
[CrossRef]

Opt. Lett. (1)

Proc. Soc. Photo-Opt. Instrum. Eng. (1)

A. K. Das, A. K. Mondal, M. Pandit, Proc. Soc. Photo-Opt. Instrum. Eng. 1572, 572 (1991).

Other (1)

A. W. Snyder, J. D. Love, Optical Waveguide Theory (Chapman & Hall, New York, 1983), p. 570.

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Figures (5)

Fig. 1
Fig. 1

Coupler of dissimilar fibers with uniform remaining cladding thickness h0.

Fig. 2
Fig. 2

Theoretical normalized coupled power versus wavelength for Li = 6 mm, d0 = 13.5 μm and Li = 9 mm, d0 = 14.7 μm.

Fig. 3
Fig. 3

Theoretical and experimental loss calibration curves for fibers F1 and F2 as a function of uniform remaining cladding thickness h.

Fig. 4
Fig. 4

Photograph of the longitudinal section of the half-coupler F1 with a remaining cladding thickness of 6 μm.

Fig. 5
Fig. 5

Theoretical and measured coupled power versus wavelength with different core spacings at Li = 8 mm.

Equations (7)

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2 h 0 = d 0 - [ a ESI ( F 1 ) + a ESI ( F 2 ) + d I ] ,
P c ( λ ) = P in ( λ ) 1 + [ Δ β ( λ ) / 2 C ( λ ) ] 2 × sin 2 [ C 2 ( λ ) + Δ β 2 ( λ ) / 4 ] 1 / 2 L i ,
P t ( λ ) = 1 - P c ( λ ) ,
Δ β η ( λ ~ λ 0 ) ,
C ( λ ) = C ( λ 0 ) + K ( λ ~ λ 0 ) ,
C ( λ 0 ) = ( A / d 0 ) exp ( - B d 0 ) ,
Δ λ = 5 L i η .

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