Abstract

We report the observation of self-pumped phase conjugation by means of internal reflection in a photorefractive medium produced by a series of intense nanosecond pulses. Nanosecond pulses from a YAG laser ranging in intensity from 9 × 104 to 9 × 105 W/cm2 were used. The crystal was rhodium-doped strontium barium niobate. The conjugate signal began with the first pulse, and the time to reach 63% of its equilibrium value scaled as I−2. The equilibrium reflectivity was 29%. A similar cw experiment with the 514-nm line of an argon laser produced a response time that scaled as I−1.1.

© 1990 Optical Society of America

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References

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  1. J. Feinberg, Opt. Lett. 7, 486 (1982).
    [CrossRef] [PubMed]
  2. L. K. Lam, T. Y. Chang, J. Feinberg, R. W. Hellwarth, Opt. Lett. 6, 475 (1981).
    [CrossRef] [PubMed]
  3. R. A. McFarlane, D. G. Steel, Opt. Lett. 8, 208 (1983).
    [CrossRef] [PubMed]
  4. R. K. Jain, K. Stenersen, Opt. Lett. 9, 546 (1984).
    [CrossRef] [PubMed]
  5. J. O. White, G. C. Valley, R. A. McFarlane, Appl. Phys. Lett. 50, 880 (1987).
    [CrossRef]
  6. J. O. White, G. C. Valley, Appl. Opt. 27, 5026 (1988).
    [CrossRef] [PubMed]
  7. M. J. Miller, E. J. Sharp, G. L. Wood, W. W. Clark, G. J. Salamo, R. R. Neurgaonkar, Opt. Lett. 12, 340 (1987).
    [CrossRef] [PubMed]
  8. J. Rodriguez, A. Siahmakoun, G. Salamo, M. J. Miller, W. W. Clark, G. L. Wood, E. J. Sharp, R. R. Neurgaonkar, Appl. Opt. 26, 1732 (1987).
    [CrossRef] [PubMed]
  9. M. Cronin-Golomb, A. Yariv, J. Appl. Phys. 57, 4906 (1985).
    [CrossRef]

1988 (1)

1987 (3)

1985 (1)

M. Cronin-Golomb, A. Yariv, J. Appl. Phys. 57, 4906 (1985).
[CrossRef]

1984 (1)

1983 (1)

1982 (1)

1981 (1)

Chang, T. Y.

Clark, W. W.

Cronin-Golomb, M.

M. Cronin-Golomb, A. Yariv, J. Appl. Phys. 57, 4906 (1985).
[CrossRef]

Feinberg, J.

Hellwarth, R. W.

Jain, R. K.

Lam, L. K.

McFarlane, R. A.

J. O. White, G. C. Valley, R. A. McFarlane, Appl. Phys. Lett. 50, 880 (1987).
[CrossRef]

R. A. McFarlane, D. G. Steel, Opt. Lett. 8, 208 (1983).
[CrossRef] [PubMed]

Miller, M. J.

Neurgaonkar, R. R.

Rodriguez, J.

Salamo, G.

Salamo, G. J.

Sharp, E. J.

Siahmakoun, A.

Steel, D. G.

Stenersen, K.

Valley, G. C.

J. O. White, G. C. Valley, Appl. Opt. 27, 5026 (1988).
[CrossRef] [PubMed]

J. O. White, G. C. Valley, R. A. McFarlane, Appl. Phys. Lett. 50, 880 (1987).
[CrossRef]

White, J. O.

J. O. White, G. C. Valley, Appl. Opt. 27, 5026 (1988).
[CrossRef] [PubMed]

J. O. White, G. C. Valley, R. A. McFarlane, Appl. Phys. Lett. 50, 880 (1987).
[CrossRef]

Wood, G. L.

Yariv, A.

M. Cronin-Golomb, A. Yariv, J. Appl. Phys. 57, 4906 (1985).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Photograph of the characteristic loop of light found in the crystal while it was self-pumping after a series of 15-nsec pulses had driven the conjugate to its steady state. The photograph was made with the light of a single pulse. The laser beam enters the crystal from the right edge at an angle of ∼40° below the normal. The c axis is directed from top to bottom.

Fig. 2
Fig. 2

Plot of the number of pulses versus intensity for self-pumping (circles) and beam fanning (triangles) for pulsed excitation. The solid line is the best fit to N63 = A(I/I0)b, with A = 9.04 × 1013 ± 2.513 × 1013 pulses and b = 2.004 ± 0.078. The dotted–dashed line is the best fit to N37 = A(I/I0)b, with A = 1.22 × 107 ± 2.9 × 106 pulses and b = 0.90 ± 0.09.

Fig. 3
Fig. 3

Plot of the response time versus intensity for self-pumping (circles, first crystal; squares, second crystal) and beam fanning (triangles) with cw excitation. The solid and dashed lines are the best fits to t63 = A(I/I0)b, with A = 8.67 ± 1.05 sec and b = 1.12 ± 0.06 for the solid line, and A = 11.7 ± 0.41 sec and b = 1.12 ± 0.09 for the dashed line. The dotted–dashed line is the best fit to t37 = A(I/I0)b, with A = 0.22 ± 0.01 sec and b = 0.92 ± 0.11.

Fig. 4
Fig. 4

Plot of the conjugate signal versus pulse number for intensities of 8.5 × 105 W/cm2 per pulse [curve (a)] and 5.4 × 105 W/cm2 per pulse [curve (b)]. The solid curves are the best fit to an exponential function in each case. The data for curve (a) are multiplied by 1/10 to reduce the curve to the same scale as curve (b). The inset shows the rise of the conjugate to equilibrium at 5.5 × 105 W/cm2 per pulse.

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