Abstract

We report significant advances in the development of simple all-fiber, tunable acousto-optic spectral filters based on null couplers. The performance agrees well with theoretical predictions and is attributed to improved control of the coupler uniformity. Furthermore, using a double-pass arrangement, we demonstrate filter bandwidth reduction and improved sidelobe suppression of -20 dB. The double-pass configuration is also shown to double the frequency shifts that are obtainable from such devices.

© 1997 Optical Society of America

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References

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1996 (1)

1995 (1)

1994 (1)

1990 (1)

C. A. Brackett, J. Selected Areas Commun. 8, 948 (1990).
[CrossRef]

1989 (1)

1986 (1)

Baran, J. E.

Birks, T. A.

Brackett, C. A.

C. A. Brackett, J. Selected Areas Commun. 8, 948 (1990).
[CrossRef]

Cheung, K. W.

Culverhouse, D. O.

D. O. Culverhouse, D. J. Richardson, T. A. Birks, and P. St. J. Russell, Opt. Lett. 20, 2381 (1995).
[CrossRef]

D. O. Culverhouse, R. I. Laming, S. G. Farwell, T. A. Birks, and M. N. Zervas, “All fiber 2×2 polarization sensitive switch,” submitted to Photon. Techol. Lett.

Curtis, L.

Farwell, S. G.

T. A. Birks, S. G. Farwell, P. St. J. Russell, and C. N. Pannell, Opt. Lett. 19, 1964 (1994); Opt. Lett. 21, 231(E) (1996).
[CrossRef] [PubMed]

D. O. Culverhouse, R. I. Laming, S. G. Farwell, T. A. Birks, and M. N. Zervas, “All fiber 2×2 polarization sensitive switch,” submitted to Photon. Techol. Lett.

Hwang, I. K.

Johnson, J. J.

Khuri-Yakub, B. T.

Kim, B. Y.

Kino, G. S.

Laming, R. I.

D. O. Culverhouse, R. I. Laming, S. G. Farwell, T. A. Birks, and M. N. Zervas, “All fiber 2×2 polarization sensitive switch,” submitted to Photon. Techol. Lett.

Pannell, C. N.

Richardson, D. J.

Risk, W. P.

Russell, P. St. J.

Shah, V. S.

Smith, D. A.

Yun, S. H.

Zervas, M. N.

D. O. Culverhouse, R. I. Laming, S. G. Farwell, T. A. Birks, and M. N. Zervas, “All fiber 2×2 polarization sensitive switch,” submitted to Photon. Techol. Lett.

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Figures (4)

Fig. 1
Fig. 1

Coupled spectra of AO filters based on a null coupler with an interaction length of (a) 25 mm, (b) 8 mm, and (c) 8 mm with a double pass.

Fig. 2
Fig. 2

Theoretical filter response of the 8-mm device for (a) single-pass (dotted curve) and (b) double-pass (solid curve) configurations.

Fig. 3
Fig. 3

Filter-tuning curve.

Fig. 4
Fig. 4

Double-pass filter configuration. H.R., highly reflective.

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