Abstract

A gain of 22 times was obtained by nondegenerate two-wave mixing in Cr:YAlO3 To our knowledge, this is the largest cw two-wave mixing gain obtained in a bulk solid-state nonphotorefractive material. The measured gain appears to be limited by beam breakup that is due to spatial nonuniformities in the nonlinear refractive-index change that are the result of inhomogeneities in the crystal. Predictions based on our data indicate that gain in excess of 200 times should be possible in Cr:YAlO3 if a homogeneous crystal can be obtained.

© 1994 Optical Society of America

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References

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  1. I. McMichael, R. Saxena, T. Chang, R. Neurgoankar, S. Rand, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS34, pp. 514–515.
  2. R. Saxena, P. Yeh, J. Opt. Soc. Am. B 7, 326 (1990).
    [Crossref]
  3. L. Adams, R. Bondurant, Opt. Lett. 16, 832 (1991).
    [Crossref] [PubMed]
  4. P. Liao, D. Bloom, Opt. Lett. 3, 4 (1978).
    [Crossref] [PubMed]
  5. D. Steel, S. Rand, J. Liu, J. Opt. Soc. Am. B 4, 1794 (1987).
    [Crossref]
  6. M. J. Weber, T. E. Varitimos, J. Appl. Phys. 45, 810 (1974).
    [Crossref]
  7. I. McMichael, P. Yeh, P. Beckwith, Opt. Lett. 13, 500 (1988).
    [Crossref] [PubMed]
  8. P. Yeh, J. Opt. Soc. Am. B 3, 747 (1986).
    [Crossref]

1991 (1)

1990 (1)

1988 (1)

1987 (1)

1986 (1)

1978 (1)

1974 (1)

M. J. Weber, T. E. Varitimos, J. Appl. Phys. 45, 810 (1974).
[Crossref]

Adams, L.

Beckwith, P.

Bloom, D.

Bondurant, R.

Chang, T.

I. McMichael, R. Saxena, T. Chang, R. Neurgoankar, S. Rand, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS34, pp. 514–515.

Liao, P.

Liu, J.

McMichael, I.

I. McMichael, P. Yeh, P. Beckwith, Opt. Lett. 13, 500 (1988).
[Crossref] [PubMed]

I. McMichael, R. Saxena, T. Chang, R. Neurgoankar, S. Rand, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS34, pp. 514–515.

Neurgoankar, R.

I. McMichael, R. Saxena, T. Chang, R. Neurgoankar, S. Rand, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS34, pp. 514–515.

Rand, S.

D. Steel, S. Rand, J. Liu, J. Opt. Soc. Am. B 4, 1794 (1987).
[Crossref]

I. McMichael, R. Saxena, T. Chang, R. Neurgoankar, S. Rand, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS34, pp. 514–515.

Saxena, R.

R. Saxena, P. Yeh, J. Opt. Soc. Am. B 7, 326 (1990).
[Crossref]

I. McMichael, R. Saxena, T. Chang, R. Neurgoankar, S. Rand, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS34, pp. 514–515.

Steel, D.

Varitimos, T. E.

M. J. Weber, T. E. Varitimos, J. Appl. Phys. 45, 810 (1974).
[Crossref]

Weber, M. J.

M. J. Weber, T. E. Varitimos, J. Appl. Phys. 45, 810 (1974).
[Crossref]

Yeh, P.

J. Appl. Phys. (1)

M. J. Weber, T. E. Varitimos, J. Appl. Phys. 45, 810 (1974).
[Crossref]

J. Opt. Soc. Am. B (3)

Opt. Lett. (3)

Other (1)

I. McMichael, R. Saxena, T. Chang, R. Neurgoankar, S. Rand, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS34, pp. 514–515.

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Figures (4)

Fig. 1
Fig. 1

Cr:YAlO3 absorption spectra showing the bleaching of color centers by heat treatment.

Fig. 2
Fig. 2

Simplified schematic of the experiment used to measure NDTWM. PZT, piezoelectric transducer.

Fig. 3
Fig. 3

Gain versus pump intensity. The solid curve is a fit of Eq. (1). The inset shows that, at high intensity, the measured gain does not increase with intensity as much as theory predicts. We believe this is due to beam breakup resulting from spatial nonuniformities of the nonlinear refractive-index change.

Fig. 4
Fig. 4

Transmitted pump with the probe off (a) at low intensity and normal exposure indicating the transmitted beam size, (b) at low intensity and long exposure showing an X-shaped pattern of linear scattering from crystal striae, and (c) at high intensity and an exposure equivalent to that in (b), showing the beam breakup. For all photographs the plane of incidence is the horizontal.

Equations (1)

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I 2 ( L ) I 2 ( 0 ) = exp ( - α L ) × exp ( [ 1 - exp ( - α L ) α L ] { 2 π n 2 I 1 ( 0 ) L / λ [ 1 + I 1 ( 0 ) / I S ] 2 } ) ,

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