Abstract

A self-pumped phase conjugator is demonstrated that operates over a wide field of view, phase conjugates separate images without cross talk, and when pumped by one incident beam will self-oscillate with mirrors placed in all four quadrants. The phase conjugator uses a single crystal of BaTiO3.

© 1983 Optical Society of America

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References

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  1. R. W. Hellwarth, “Generation of time-reversed wave fronts by nonlinear refraction,” J. Opt. Soc. Am. 67, 1 (1977).
    [CrossRef]
  2. J. Feinberg, “Self-pumped, continuous-wave phase conjugator using internal reflection,” Opt. Lett. 7, 486 (1982).
    [CrossRef] [PubMed]
  3. K. R. MacDonald, J. Feinberg, “Theory of a self-pumped phase conjugator with two coupled interaction regions,” J. Opt. Soc. Am. 73, 548 (1983).
    [CrossRef]
  4. J. Feinberg, R. W. Hellwarth, “Phase-conjugating mirror with continuous wave gain,” Opt. Lett. 5, 519 (1980); erratum, Opt. Lett., 6, 257 (1981).
    [CrossRef] [PubMed]
  5. A. Yariv, D. M. Pepper, “Amplified reflection, phase conjugation, and oscillation in degenerate four-wave mixing,” Opt. Lett. 1, 16 (1977).
    [CrossRef] [PubMed]
  6. R. Trebino, A. E. Siegman, “Phase-conjugate reflection at arbitrary angles using TEM00 pump beams,” Opt. Commun. 32, 1 (1980).
    [CrossRef]
  7. A. Yariv, J. AuYeung, D. Fekete, D. M. Pepper, “Image phase compensation and real-time holography by four-wave mixing in optical fibers,” Appl. Phys. Lett. 32, 635 (1978).
    [CrossRef]
  8. R. W. Hellwarth, “Theory of phase-conjugation by four-wave mixing in a waveguide,” IEEE J. Quantum Electron. QE-15, 101 (1979).
    [CrossRef]

1983 (1)

1982 (1)

J. Feinberg, “Self-pumped, continuous-wave phase conjugator using internal reflection,” Opt. Lett. 7, 486 (1982).
[CrossRef] [PubMed]

1980 (2)

J. Feinberg, R. W. Hellwarth, “Phase-conjugating mirror with continuous wave gain,” Opt. Lett. 5, 519 (1980); erratum, Opt. Lett., 6, 257 (1981).
[CrossRef] [PubMed]

R. Trebino, A. E. Siegman, “Phase-conjugate reflection at arbitrary angles using TEM00 pump beams,” Opt. Commun. 32, 1 (1980).
[CrossRef]

1979 (1)

R. W. Hellwarth, “Theory of phase-conjugation by four-wave mixing in a waveguide,” IEEE J. Quantum Electron. QE-15, 101 (1979).
[CrossRef]

1978 (1)

A. Yariv, J. AuYeung, D. Fekete, D. M. Pepper, “Image phase compensation and real-time holography by four-wave mixing in optical fibers,” Appl. Phys. Lett. 32, 635 (1978).
[CrossRef]

1977 (2)

A. Yariv, D. M. Pepper, “Amplified reflection, phase conjugation, and oscillation in degenerate four-wave mixing,” Opt. Lett. 1, 16 (1977).
[CrossRef] [PubMed]

R. W. Hellwarth, “Generation of time-reversed wave fronts by nonlinear refraction,” J. Opt. Soc. Am. 67, 1 (1977).
[CrossRef]

AuYeung, J.

A. Yariv, J. AuYeung, D. Fekete, D. M. Pepper, “Image phase compensation and real-time holography by four-wave mixing in optical fibers,” Appl. Phys. Lett. 32, 635 (1978).
[CrossRef]

Feinberg, J.

Fekete, D.

A. Yariv, J. AuYeung, D. Fekete, D. M. Pepper, “Image phase compensation and real-time holography by four-wave mixing in optical fibers,” Appl. Phys. Lett. 32, 635 (1978).
[CrossRef]

Hellwarth, R. W.

J. Feinberg, R. W. Hellwarth, “Phase-conjugating mirror with continuous wave gain,” Opt. Lett. 5, 519 (1980); erratum, Opt. Lett., 6, 257 (1981).
[CrossRef] [PubMed]

R. W. Hellwarth, “Theory of phase-conjugation by four-wave mixing in a waveguide,” IEEE J. Quantum Electron. QE-15, 101 (1979).
[CrossRef]

R. W. Hellwarth, “Generation of time-reversed wave fronts by nonlinear refraction,” J. Opt. Soc. Am. 67, 1 (1977).
[CrossRef]

MacDonald, K. R.

Pepper, D. M.

A. Yariv, J. AuYeung, D. Fekete, D. M. Pepper, “Image phase compensation and real-time holography by four-wave mixing in optical fibers,” Appl. Phys. Lett. 32, 635 (1978).
[CrossRef]

A. Yariv, D. M. Pepper, “Amplified reflection, phase conjugation, and oscillation in degenerate four-wave mixing,” Opt. Lett. 1, 16 (1977).
[CrossRef] [PubMed]

Siegman, A. E.

R. Trebino, A. E. Siegman, “Phase-conjugate reflection at arbitrary angles using TEM00 pump beams,” Opt. Commun. 32, 1 (1980).
[CrossRef]

Trebino, R.

R. Trebino, A. E. Siegman, “Phase-conjugate reflection at arbitrary angles using TEM00 pump beams,” Opt. Commun. 32, 1 (1980).
[CrossRef]

Yariv, A.

A. Yariv, J. AuYeung, D. Fekete, D. M. Pepper, “Image phase compensation and real-time holography by four-wave mixing in optical fibers,” Appl. Phys. Lett. 32, 635 (1978).
[CrossRef]

A. Yariv, D. M. Pepper, “Amplified reflection, phase conjugation, and oscillation in degenerate four-wave mixing,” Opt. Lett. 1, 16 (1977).
[CrossRef] [PubMed]

Appl. Phys. Lett. (1)

A. Yariv, J. AuYeung, D. Fekete, D. M. Pepper, “Image phase compensation and real-time holography by four-wave mixing in optical fibers,” Appl. Phys. Lett. 32, 635 (1978).
[CrossRef]

IEEE J. Quantum Electron. (1)

R. W. Hellwarth, “Theory of phase-conjugation by four-wave mixing in a waveguide,” IEEE J. Quantum Electron. QE-15, 101 (1979).
[CrossRef]

J. Opt. Soc. Am. (1)

R. W. Hellwarth, “Generation of time-reversed wave fronts by nonlinear refraction,” J. Opt. Soc. Am. 67, 1 (1977).
[CrossRef]

J. Opt. Soc. Am. (1)

Opt. Lett. (1)

J. Feinberg, “Self-pumped, continuous-wave phase conjugator using internal reflection,” Opt. Lett. 7, 486 (1982).
[CrossRef] [PubMed]

Opt. Commun. (1)

R. Trebino, A. E. Siegman, “Phase-conjugate reflection at arbitrary angles using TEM00 pump beams,” Opt. Commun. 32, 1 (1980).
[CrossRef]

Opt. Lett. (2)

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Figures (4)

Fig. 1
Fig. 1

Experimental setup. A beam from a cw argon-ion laser is directed at an angle θ1 = 11° into a photorefractive BaTiO3 crystal. The self-pumped phase-conjugate return beam is deflected by beam splitter BS1 into a detector D1. Another beam is incident upon the BaTiO3 crystal at an adjustable angle θ2, which can be varied over a wide range. The resulting phase-conjugate beam returns through beam splitter BS2 and is measured by detector D2. The direction of the c axis of the crystal is as shown.

Fig. 2
Fig. 2

Plot of the measured phase-conjugate reflectivity R2 versus the angle of incidence θ2 for two different incident intensities: circles, 20 W/cm2; triangles, 2 W/cm2. Beam 1 was incident at a fixed angle θ1 = 11° and with a fixed intensity I = 2 W/cm2. Self-oscillation could be observed over the angular range indicated when incident beam 2 was replaced by a plane mirror.

Fig. 3
Fig. 3

One image can be used to phase conjugate another image. Beams #1 and #2 pass through different images and are focused with lenses L into the BaTiO3 crystal. The phase-conjugate return beams are deflected by beam splitters BS onto ground-glass screens G and photographed with cameras C. The speckle noise on the images can be reduced by moving the screens G. The resulting images are shown in Fig. 4.

Fig. 4
Fig. 4

Phase-conjugate images: (a) A self-pumped image of a resolution chart. (b) Image of a cat formed by overlapping in the crystal the incident beams from the cat and from the resolution chart.

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