Abstract

We demonstrate both numerically and experimentally that rare-earth-doped twin-core fiber couplers can function as a narrow-bandpass wavelength filter or as a demultiplexer. The experimental bandwidth obtained is 6.5 nm. In addition, the filtered signal experiences a gain of 20 dB instead of attenuation.

© 1993 Optical Society of America

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References

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  1. T. Tjugiarto, G. D. Peng, P. L. Chu, Electron. Lett. 29, 1077 (1993).
    [CrossRef]
  2. C. J. Setterlind, L. Thylen, IEEE J. Quantum Electron. QE-22, 595 (1986).
    [CrossRef]
  3. J. M. Liu, C. Yeh, Appl. Phys. Lett. 50, 1625 (1987).
    [CrossRef]
  4. S. Trillo, S. Wabnitz, J. M. Soto-Crespo, E. M. Wright, IEEE J. Quantum Electron. 27, 410 (1991).
    [CrossRef]
  5. M. J. Adams, D. A. H. Mace, J. Singh, M. A. Fisher, IEEE J. Quantum Electron. 26, 1764 (1990).
    [CrossRef]

1993 (1)

T. Tjugiarto, G. D. Peng, P. L. Chu, Electron. Lett. 29, 1077 (1993).
[CrossRef]

1991 (1)

S. Trillo, S. Wabnitz, J. M. Soto-Crespo, E. M. Wright, IEEE J. Quantum Electron. 27, 410 (1991).
[CrossRef]

1990 (1)

M. J. Adams, D. A. H. Mace, J. Singh, M. A. Fisher, IEEE J. Quantum Electron. 26, 1764 (1990).
[CrossRef]

1987 (1)

J. M. Liu, C. Yeh, Appl. Phys. Lett. 50, 1625 (1987).
[CrossRef]

1986 (1)

C. J. Setterlind, L. Thylen, IEEE J. Quantum Electron. QE-22, 595 (1986).
[CrossRef]

Adams, M. J.

M. J. Adams, D. A. H. Mace, J. Singh, M. A. Fisher, IEEE J. Quantum Electron. 26, 1764 (1990).
[CrossRef]

Chu, P. L.

T. Tjugiarto, G. D. Peng, P. L. Chu, Electron. Lett. 29, 1077 (1993).
[CrossRef]

Fisher, M. A.

M. J. Adams, D. A. H. Mace, J. Singh, M. A. Fisher, IEEE J. Quantum Electron. 26, 1764 (1990).
[CrossRef]

Liu, J. M.

J. M. Liu, C. Yeh, Appl. Phys. Lett. 50, 1625 (1987).
[CrossRef]

Mace, D. A. H.

M. J. Adams, D. A. H. Mace, J. Singh, M. A. Fisher, IEEE J. Quantum Electron. 26, 1764 (1990).
[CrossRef]

Peng, G. D.

T. Tjugiarto, G. D. Peng, P. L. Chu, Electron. Lett. 29, 1077 (1993).
[CrossRef]

Setterlind, C. J.

C. J. Setterlind, L. Thylen, IEEE J. Quantum Electron. QE-22, 595 (1986).
[CrossRef]

Singh, J.

M. J. Adams, D. A. H. Mace, J. Singh, M. A. Fisher, IEEE J. Quantum Electron. 26, 1764 (1990).
[CrossRef]

Soto-Crespo, J. M.

S. Trillo, S. Wabnitz, J. M. Soto-Crespo, E. M. Wright, IEEE J. Quantum Electron. 27, 410 (1991).
[CrossRef]

Thylen, L.

C. J. Setterlind, L. Thylen, IEEE J. Quantum Electron. QE-22, 595 (1986).
[CrossRef]

Tjugiarto, T.

T. Tjugiarto, G. D. Peng, P. L. Chu, Electron. Lett. 29, 1077 (1993).
[CrossRef]

Trillo, S.

S. Trillo, S. Wabnitz, J. M. Soto-Crespo, E. M. Wright, IEEE J. Quantum Electron. 27, 410 (1991).
[CrossRef]

Wabnitz, S.

S. Trillo, S. Wabnitz, J. M. Soto-Crespo, E. M. Wright, IEEE J. Quantum Electron. 27, 410 (1991).
[CrossRef]

Wright, E. M.

S. Trillo, S. Wabnitz, J. M. Soto-Crespo, E. M. Wright, IEEE J. Quantum Electron. 27, 410 (1991).
[CrossRef]

Yeh, C.

J. M. Liu, C. Yeh, Appl. Phys. Lett. 50, 1625 (1987).
[CrossRef]

Appl. Phys. Lett. (1)

J. M. Liu, C. Yeh, Appl. Phys. Lett. 50, 1625 (1987).
[CrossRef]

Electron. Lett. (1)

T. Tjugiarto, G. D. Peng, P. L. Chu, Electron. Lett. 29, 1077 (1993).
[CrossRef]

IEEE J. Quantum Electron. (3)

C. J. Setterlind, L. Thylen, IEEE J. Quantum Electron. QE-22, 595 (1986).
[CrossRef]

S. Trillo, S. Wabnitz, J. M. Soto-Crespo, E. M. Wright, IEEE J. Quantum Electron. 27, 410 (1991).
[CrossRef]

M. J. Adams, D. A. H. Mace, J. Singh, M. A. Fisher, IEEE J. Quantum Electron. 26, 1764 (1990).
[CrossRef]

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Figures (3)

Fig. 1
Fig. 1

Experimental setup for measurement of gain and output power spectral characteristics. 1, Ti:sapphire laser; 2, chromatic beam splitter; 3, chopper; 4, pinhole; 5, lens with f = 5 cm; 6, white-light source; 7, 20× lens; 8, twin-core Nd3+-doped fiber; 9, 20× lens; 10, long-wavelength filter (RG 850); 11, monochromator; 12, silicon photodetector; 13, lock-in amplifier; 14, computer.

Fig. 2
Fig. 2

Coupler gain characteristics: solid curves, theory; dotted curves, experiment, (a) Core 2, (b) core 1.

Fig. 3
Fig. 3

Output signal spectral characteristics: solid curves, theory; dotted curves, experiment, (a) Core 2, (b) core 1.

Tables (1)

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Table 1 Parameters Used to Obtain Numerical Solutionsa

Equations (4)

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d A 1 ( z ) d z = j κ A 2 ( z ) exp ( j Δ β z ) + j Γ s ω 2 n c χ E 1 A 1 ,
d A 2 ( z ) d z = j κ A 1 ( z ) exp ( j Δ β z ) + j Γ s ω 2 n c χ E 2 A 2 ,
χ E i = 2 n c ω g 00 P pi P p th δ j 1 + δ 2 1 1 + | A i | 2 P sat 0 ( 1 + δ 2 ) ,
G c i = | A i ( z = L ) | 2 | A in ( z = 0 ) | 2 ,

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