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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 14, Iss. 10 — Oct. 1, 1997
  • pp: 2530–2542

Second-harmonic generation in atomic vapor with picosecond laser pulses

Doseok Kim, Christopher S. Mullin, and Y. R. Shen  »View Author Affiliations

JOSA B, Vol. 14, Issue 10, pp. 2530-2542 (1997)

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Picosecond laser pulses were used to study the highly forbidden resonant second-harmonic generation (SHG) in potassium vapor. The input intensity dependence, vapor density dependence, buffer-gas pressure dependence, and spatial profile of the SHG were measured. A pump–probe experiment was conducted to probe the time dependence of the SHG signal. The experimental results can be understood from an ionization-initiated dc-field-induced SHG model. A theory of a dc-field-induced SHG model is developed that takes into account the time development of the dc electric field in detail. This temporal buildup of the dc field along with transient coherent excitation between two-photon-allowed transitions can explain the experimental results quantitatively, including the previous vapor SHG results with nanosecond laser pulses.

© 1997 Optical Society of America

Doseok Kim, Christopher S. Mullin, and Y. R. Shen, "Second-harmonic generation in atomic vapor with picosecond laser pulses," J. Opt. Soc. Am. B 14, 2530-2542 (1997)

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