Abstract

Two-wave mixing absorption in a supersonic beam containing I2 has been studied. The results are in agreement with theory for probe intensities comparable with the pump intensity. However, at very low probe-beam intensities, the absorption deviates substantially from the predicted value and becomes the same as that for the pump beam alone. We believe that this behavior is caused by density variations in the molecular beam and suggest that this effect can be developed into a tool for probing optical inhomogeneities on a microscopic scale.

© 1987 Optical Society of America

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References

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  1. H. J. Eichler, P. Gunter, D. W. Pohl, Laser-Induced Dynamic Gratings (Springer-Verlag, Berlin, 1986).
  2. V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979).
    [CrossRef]
  3. V. Z. Bryskin, A. V. Groznyi, V. G. Sidorovich, D. I. Staselko, Sov. Tech. Phys. Lett. 2, 219 (1976).
  4. M. Sargent, Appl. Phys. 9, 127 (1976).
    [CrossRef]
  5. G. R. Hanes, J. Lapierre, P. R. Bunker, K. C. Shotton, J. Mol. Spectrosc. 39, 506 (1971).
    [CrossRef]
  6. M. D. Levenson, A. L. Schawlow, Phys. Rev. A 6, 10 (1972).
    [CrossRef]
  7. K. Sakurai, G. Capelle, H. P. Broida, J. Chem. Phys. 54, 1220 (1971).
    [CrossRef]
  8. Here and later in the paper by P(7) we mean the P(7)/R(11) pair whose hyperfine components overlap one another. Since the measured rotational temperature in the interaction region is 4–5 K, the contribution of R(11) to the absorption is only about 20%.
  9. P. A. Madden, Chem. Phys. Lett. 35, 521 (1975).
    [CrossRef]

1979 (1)

V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979).
[CrossRef]

1976 (2)

V. Z. Bryskin, A. V. Groznyi, V. G. Sidorovich, D. I. Staselko, Sov. Tech. Phys. Lett. 2, 219 (1976).

M. Sargent, Appl. Phys. 9, 127 (1976).
[CrossRef]

1975 (1)

P. A. Madden, Chem. Phys. Lett. 35, 521 (1975).
[CrossRef]

1972 (1)

M. D. Levenson, A. L. Schawlow, Phys. Rev. A 6, 10 (1972).
[CrossRef]

1971 (2)

K. Sakurai, G. Capelle, H. P. Broida, J. Chem. Phys. 54, 1220 (1971).
[CrossRef]

G. R. Hanes, J. Lapierre, P. R. Bunker, K. C. Shotton, J. Mol. Spectrosc. 39, 506 (1971).
[CrossRef]

Broida, H. P.

K. Sakurai, G. Capelle, H. P. Broida, J. Chem. Phys. 54, 1220 (1971).
[CrossRef]

Bryskin, V. Z.

V. Z. Bryskin, A. V. Groznyi, V. G. Sidorovich, D. I. Staselko, Sov. Tech. Phys. Lett. 2, 219 (1976).

Bunker, P. R.

G. R. Hanes, J. Lapierre, P. R. Bunker, K. C. Shotton, J. Mol. Spectrosc. 39, 506 (1971).
[CrossRef]

Capelle, G.

K. Sakurai, G. Capelle, H. P. Broida, J. Chem. Phys. 54, 1220 (1971).
[CrossRef]

Eichler, H. J.

H. J. Eichler, P. Gunter, D. W. Pohl, Laser-Induced Dynamic Gratings (Springer-Verlag, Berlin, 1986).

Groznyi, A. V.

V. Z. Bryskin, A. V. Groznyi, V. G. Sidorovich, D. I. Staselko, Sov. Tech. Phys. Lett. 2, 219 (1976).

Gunter, P.

H. J. Eichler, P. Gunter, D. W. Pohl, Laser-Induced Dynamic Gratings (Springer-Verlag, Berlin, 1986).

Hanes, G. R.

G. R. Hanes, J. Lapierre, P. R. Bunker, K. C. Shotton, J. Mol. Spectrosc. 39, 506 (1971).
[CrossRef]

Kukhtarev, N. V.

V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979).
[CrossRef]

Lapierre, J.

G. R. Hanes, J. Lapierre, P. R. Bunker, K. C. Shotton, J. Mol. Spectrosc. 39, 506 (1971).
[CrossRef]

Levenson, M. D.

M. D. Levenson, A. L. Schawlow, Phys. Rev. A 6, 10 (1972).
[CrossRef]

Madden, P. A.

P. A. Madden, Chem. Phys. Lett. 35, 521 (1975).
[CrossRef]

Odulov, S. G.

V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979).
[CrossRef]

Pohl, D. W.

H. J. Eichler, P. Gunter, D. W. Pohl, Laser-Induced Dynamic Gratings (Springer-Verlag, Berlin, 1986).

Sakurai, K.

K. Sakurai, G. Capelle, H. P. Broida, J. Chem. Phys. 54, 1220 (1971).
[CrossRef]

Sargent, M.

M. Sargent, Appl. Phys. 9, 127 (1976).
[CrossRef]

Schawlow, A. L.

M. D. Levenson, A. L. Schawlow, Phys. Rev. A 6, 10 (1972).
[CrossRef]

Shotton, K. C.

G. R. Hanes, J. Lapierre, P. R. Bunker, K. C. Shotton, J. Mol. Spectrosc. 39, 506 (1971).
[CrossRef]

Sidorovich, V. G.

V. Z. Bryskin, A. V. Groznyi, V. G. Sidorovich, D. I. Staselko, Sov. Tech. Phys. Lett. 2, 219 (1976).

Soskin, M. S.

V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979).
[CrossRef]

Staselko, D. I.

V. Z. Bryskin, A. V. Groznyi, V. G. Sidorovich, D. I. Staselko, Sov. Tech. Phys. Lett. 2, 219 (1976).

Vinetskii, V. L.

V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979).
[CrossRef]

Appl. Phys. (1)

M. Sargent, Appl. Phys. 9, 127 (1976).
[CrossRef]

Chem. Phys. Lett. (1)

P. A. Madden, Chem. Phys. Lett. 35, 521 (1975).
[CrossRef]

J. Chem. Phys. (1)

K. Sakurai, G. Capelle, H. P. Broida, J. Chem. Phys. 54, 1220 (1971).
[CrossRef]

J. Mol. Spectrosc. (1)

G. R. Hanes, J. Lapierre, P. R. Bunker, K. C. Shotton, J. Mol. Spectrosc. 39, 506 (1971).
[CrossRef]

Phys. Rev. A (1)

M. D. Levenson, A. L. Schawlow, Phys. Rev. A 6, 10 (1972).
[CrossRef]

Sov. Phys. Usp. (1)

V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979).
[CrossRef]

Sov. Tech. Phys. Lett. (1)

V. Z. Bryskin, A. V. Groznyi, V. G. Sidorovich, D. I. Staselko, Sov. Tech. Phys. Lett. 2, 219 (1976).

Other (2)

Here and later in the paper by P(7) we mean the P(7)/R(11) pair whose hyperfine components overlap one another. Since the measured rotational temperature in the interaction region is 4–5 K, the contribution of R(11) to the absorption is only about 20%.

H. J. Eichler, P. Gunter, D. W. Pohl, Laser-Induced Dynamic Gratings (Springer-Verlag, Berlin, 1986).

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Figures (3)

Fig. 1
Fig. 1

Measured single-beam saturated-absorption data plotted against the curve given by Eq. (3) when Is0 = 4.4 W cm−2 is used.

Fig. 2
Fig. 2

Experimental arrangement for saturated two-wave mixing absorption studies. The side view is along the bisector of the two laser beams, and the end view is facing into the molecular-beam axis. The tapered arrows in the side view are meant to show that the two beams are going into the paper.

Fig. 3
Fig. 3

Measured probe-beam absorption versus its intensity for a small-signal absorption of 5.5% and Ipump = 25Is0. The solid curve is given by Eq. (7), and the dashed line indicates the single-beam saturated absorption of the pump.

Equations (7)

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A 0 , i = c σ i N i γ i R i υ ω i d Δ 1 + Δ 2 = π c σ i N i γ i R i υ ω i .
A i = c σ i N i γ i R i υ ω i d Δ 1 + Δ 2 + ( I / I s , i ) = A 0 , i 1 + ( I / I s , i ) ,
A = A 0 1 + ( I / I s 0 ) ,
α ( Δ ) = σ N S ( Δ ) ,
S ( Δ ) = I s 0 2 I 1 [ 1 1 + ( I 2 I 1 ) [ 1 + 2 ( I 1 + I 2 ) + ( I 1 I 2 ) 2 ] 1 / 2 ]
I j = 1 1 + Δ 2 I j I s 0 ,
A TWM = A 0 S ( Δ ) d Δ .

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