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Collisional effects upon optical coherences: Experimental study in a xenon three-level system

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Abstract

Laser induced nonlinear absorption profiles in a three-level system have been recorded to study the effect of elastic collisions upon optical coherences. In our particular system, the signal is due to a pure double-quantum term, where we have separated the effect of phase-interrupting collisions from the effect of velocity-changing collisions. Experimental results show that the effect of velocity-changing collisions is very small, and that broadening of the signal is due to phase-interrupting collisions mainly. We are able to determine the increase of the decay rate of the coherent superposition (the “coherence”) of two levels of same parity [ 13/dp=(6.5±1) MHz/Torr] and an upper limit for the mean velocity change (ũ≲5m/s).

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References

  1. 1.

    V. A. Alekseev, T.L. Andreeva, I.I. Sobelman: JETP35, 325 (1972) and37, 413 (1973)

  2. 2.

    P.R. Berman: Phys. Rev. A5, 927 (1972)

  3. 3.

    Ph. Cahuzac, E. Marié, O. Robaux, R. Vetter, P. R. Berman: J. Phys. B11, 645 (1978)

  4. 4.

    J. L. LeGouët: J. Phys. B.11, 3001 (1978)

  5. 5.

    L. S. Vasilenko, V. P. Kochanov, V. I. Chebotaev: Opt. Commun.20, 409 (1977)

  6. 6.

    V. P. Kochanov, S. G. Rautian, A. M. Shalagin: Zh. Eksp. Teor. Fiz.72, 1358 (1977)

  7. 7.

    T. W. Hänsch, P.E. Toschek: Z. Physik236, 213 (1970)

  8. 8.

    T. Hänsch, R. Keil, A. Schabert, Ch. Schmelzer, P. Toschek: Z. Physik226, 293 (1969)

  9. 9.

    T.W. Hänsch, P.E. Toschek: IEEE J. QE-5, 61 (1969)

  10. 10.

    R. Keil, A. Schabert, P.E. Toschek: Z. Physik261, 71 (1973)

  11. 11.

    I. M. Beterov, Y. A. Matyugin, V. P. Chebotaev: Zh. Eksp. Teor. Fiz.64, 1495 (1973) [JETP37, 756 (1973)]

  12. 12.

    M. Aymar: At. Data Nucl. Data Tables21, 537 (1978)

  13. 13.

    J.L. LeGouët, P.R. Berman: Phys. Rev. A17, 52 (1978)

  14. 14.

    Ph. Cahuzac, R. Vetter: Phys. Rev. A14, 270 (1976)

  15. 15.

    A. Dalgarno: Adv. Phys.11, 281 (1962)

  16. 16.

    A. Aymar: private communication

  17. 17.

    J.Brochard, R. Vetter: J. Phys. B7, 315 (1974)

  18. 18.

    The pressure variation of the third coherence relaxation, γ12, was recently also measured: 12/dp=(5.5±0.7) MHz/Torr. See: R. Vetter, E. Marié: J. Phys. B.11, 2845 (1978)

  19. 19.

    P. R. Berman, J. M. Levy, R. G. Brewer: Phys. Rev. A11, 1668 (1975)

  20. 20.

    B. J. Feldman, M. S. Feld: Phys. Rev. A5, 899 (1972)

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Cahuzac, P., LeGouët, J.L., Toschek, P.E. et al. Collisional effects upon optical coherences: Experimental study in a xenon three-level system. Appl. Phys. 20, 83–88 (1979). https://doi.org/10.1007/BF00901791

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