Abstract

A new all-fiber-optic nonreciprocal device using two acousto-optic frequency shifters is proposed and demonstrated. When the device was operated as an optical isolator, an extinction ratio of 22  dB was obtained. The device's unique modulation capability is also described.

© 1997 Optical Society of America

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References

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1996 (3)

1993 (2)

D. Marcuse, IEEE J. Quantum Electron. 29, 2957 (1993).
[CrossRef]

Y. Fujii, Opt. Lett. 18, 250 (1993).
[CrossRef]

1990 (1)

1989 (1)

M. Martinelli, Opt. Commun. 72, 341 (1989).
[CrossRef]

1988 (1)

H. E. Engan, B. Y. Kim, J. N. Blake, and H. J. Shaw, J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

1987 (1)

1982 (1)

1981 (2)

1978 (1)

A. Shibukawa and M. Kobayashi, Electron. Lett. 14, 816 (1978).
[CrossRef]

1964 (1)

Aplet, L. J.

Barlow, A. J.

Blake, J. N.

H. E. Engan, B. Y. Kim, J. N. Blake, and H. J. Shaw, J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

B. Y. Kim, J. N. Blake, S. Y. Huang, and H. J. Shaw, Opt. Lett. 12, 729 (1987).
[CrossRef] [PubMed]

Carson, J. W.

Chang, K. W.

Day, G.

Engan, H. E.

D. Östling, B. Langli, and H. E. Engan, Opt. Lett. 21, 1553 (1996).
[CrossRef] [PubMed]

H. E. Engan, B. Y. Kim, J. N. Blake, and H. J. Shaw, J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

Findakly, T.

Fujii, Y.

Huang, S. Y.

Hwang, I. K.

Jeong, H. J.

Kim, B. K.

Kim, B. Y.

Kobayashi, M.

A. Shibukawa and M. Kobayashi, Electron. Lett. 14, 816 (1978).
[CrossRef]

Langli, B.

Marcuse, D.

D. Marcuse, IEEE J. Quantum Electron. 29, 2957 (1993).
[CrossRef]

Martinelli, M.

M. Martinelli, Opt. Commun. 72, 341 (1989).
[CrossRef]

Östling, D.

Payne, D. N.

Ramskov-Hansen, J. J.

Shaw, H. J.

H. E. Engan, B. Y. Kim, J. N. Blake, and H. J. Shaw, J. Lightwave Technol. 6, 428 (1988).
[CrossRef]

B. Y. Kim, J. N. Blake, S. Y. Huang, and H. J. Shaw, Opt. Lett. 12, 729 (1987).
[CrossRef] [PubMed]

Shibukawa, A.

A. Shibukawa and M. Kobayashi, Electron. Lett. 14, 816 (1978).
[CrossRef]

Sorin, W.

Stolen, R. H.

Turner, E. H.

Yun, S. H.

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Figures (4)

Fig. 1
Fig. 1

(a) Nonreciprocal phase shifter and (b) a nonreciprocal interferometer based on a nonreciprocal phase shifter. BS's, 50/50 beam splitters.

Fig. 2
Fig. 2

Schematic diagram of (a) a two-mode nonreciprocal interferometer and (b) an acousto-optic frequency shifter. MS, LP11 mode stripper; FS, frequency shifter; β01, β11, propagation constants of the LP01 and the LP11 modes.

Fig. 3
Fig. 3

Experimental setup: SMF's, single-mode fibers; TMF, two-mode fiber; PC, polarization controller; DET1, DET2, detectors.

Fig. 4
Fig. 4

Nonreciprocal optical transmissions in the opposite directions modulated in (a) square and (b) sine shapes. 0, electrical ground; 1, maximum transmission intensity.

Equations (6)

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

Δϕnr=4πfanL/c,
Δϕr=β11--β01L+δa.
Δϕl=β11+-β01L+δa.
Δϕnr=Δϕl-Δϕr=β11+-β11-L.
Δϕr=2Nπ, Δϕl=2N+1π,
Δϕnr=β11+-β11-Lβ11ff02faL=4πneffLcfa.

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