Abstract

We describe the use of two-photon absorption in a photorefractive crystal for recording bit data in multilayered optical memory. A short-pulse near-infrared laser is used for generating the photorefractive effect by two-photon absorption. We succeeded in recording and reading seven layers of data in a LiNbO3 crystal with a lateral resolution (distance between bits) of 5 µm and an axial resolution (distance between layers) of 20 µm.

© 1998 Optical Society of America

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References

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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]

1996 (2)

1995 (1)

1993 (1)

S. Kawata, T. Tanaka, Y. Hashimoto, and Y. Kawata, Proc. SPIE 2042, 314 (1993).
[CrossRef]

1991 (1)

1990 (1)

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

1989 (1)

D. A. Parthenopoulos and P. M. Rentzepis, Science 245, 843 (1989).
[CrossRef] [PubMed]

1976 (1)

D. von der Linde, A. M. Glass, and K. F. Rodgers, J. Appl. Phys. 47, 217 (1976).
[CrossRef]

1974 (1)

D. von der Linde, A. M. Glass, and K. F. Rodgers, Appl. Phys. Lett. 25, 155 (1974).
[CrossRef]

Callan, J. P.

Denk, W.

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

Finlay, R. J.

Glass, A. M.

D. von der Linde, A. M. Glass, and K. F. Rodgers, J. Appl. Phys. 47, 217 (1976).
[CrossRef]

D. von der Linde, A. M. Glass, and K. F. Rodgers, Appl. Phys. Lett. 25, 155 (1974).
[CrossRef]

Glezer, E. N.

Hashimoto, Y.

Y. Kawata, H. Ueki, Y. Hashimoto, and S. Kawata, Appl. Opt. 34, 4105 (1995).
[CrossRef] [PubMed]

S. Kawata, T. Tanaka, Y. Hashimoto, and Y. Kawata, Proc. SPIE 2042, 314 (1993).
[CrossRef]

Her, T.-H.

Huang, L.

Kawata, S.

Kawata, Y.

Mazur, E.

Milosavljevic, M.

Parthenopoulos, D. A.

D. A. Parthenopoulos and P. M. Rentzepis, Science 245, 843 (1989).
[CrossRef] [PubMed]

Rentzepis, P. M.

D. A. Parthenopoulos and P. M. Rentzepis, Science 245, 843 (1989).
[CrossRef] [PubMed]

Rodgers, K. F.

D. von der Linde, A. M. Glass, and K. F. Rodgers, J. Appl. Phys. 47, 217 (1976).
[CrossRef]

D. von der Linde, A. M. Glass, and K. F. Rodgers, Appl. Phys. Lett. 25, 155 (1974).
[CrossRef]

Strickler, J. H.

J. H. Strickler and W. W. Webb, Opt. Lett. 16, 1780 (1991).
[CrossRef] [PubMed]

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

Tanaka, T.

S. Kawata, T. Tanaka, Y. Hashimoto, and Y. Kawata, Proc. SPIE 2042, 314 (1993).
[CrossRef]

Ueki, H.

von der Linde, D.

D. von der Linde, A. M. Glass, and K. F. Rodgers, J. Appl. Phys. 47, 217 (1976).
[CrossRef]

D. von der Linde, A. M. Glass, and K. F. Rodgers, Appl. Phys. Lett. 25, 155 (1974).
[CrossRef]

Webb, W. W.

J. H. Strickler and W. W. Webb, Opt. Lett. 16, 1780 (1991).
[CrossRef] [PubMed]

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

Appl. Opt. (2)

Appl. Phys. Lett. (1)

D. von der Linde, A. M. Glass, and K. F. Rodgers, Appl. Phys. Lett. 25, 155 (1974).
[CrossRef]

J. Appl. Phys. (1)

D. von der Linde, A. M. Glass, and K. F. Rodgers, J. Appl. Phys. 47, 217 (1976).
[CrossRef]

Opt. Lett. (2)

Proc. SPIE (1)

S. Kawata, T. Tanaka, Y. Hashimoto, and Y. Kawata, Proc. SPIE 2042, 314 (1993).
[CrossRef]

Science (2)

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

D. A. Parthenopoulos and P. M. Rentzepis, Science 245, 843 (1989).
[CrossRef] [PubMed]

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Figures (5)

Fig. 1
Fig. 1

Excitation of electrons in the donor sites by two-photon absorption.

Fig. 2
Fig. 2

Data recording-and-readout system: A Ti:sap-phire laser is used as a light source, and a phase-contrast microscope configuration is used for data readout. 3D, three dimensional.

Fig. 3
Fig. 3

Bit data recorded with (a) a pulsed laser and (b) a cw laser. The light exposure was the same for each case.

Fig. 4
Fig. 4

Cross section of recorded bit along (a) the xz plane and (b) the optical z axis.

Fig. 5
Fig. 5

Recording and readout results for the multilayered optical memory. Seven-layer recording is demonstrated.

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