Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Soviet Journal of Quantum Electronics

Influence of multiphoton ionization on frequency conversion in alkali metal vapors

С. А. Бахрамов, I. G. Kirin, Pulat K. Khabibullaev, N Sh Shaabdurakhmanova

Published Dec 31, 1982• 4 citations
Publisher

Abstract

An investigation was made of tunable emission of violet radiation from alkali metal vapors involving a fourphoton process using radiation from a single tunable laser. The influence of ionization of the atoms on the parameters of the emitted radiation was also studied. It was established that as the vapor pressure increases, efficient collisional ionization is observed in addition to resonant three-photon ionization and this may result in complete ionization of the atoms.

DOI
10.1070/qe1982v012n12abeh006281

Related papers

Conversion of tunable infrared radiation in alkali metal vapors

Sergei A. Komarov, Victor V. Krasnikov, Vladimir S Solomatin

A study was made of conversion of radiation in alkali metal vapors involving two-photon excitation of a forbidden transition by high-power pump radiation and by a weak infrared signal. Measurements showed that, in addition to tunability over a wide frequency range, such conversion was of the narrow-band type and could be used in a nonlinear infrared spectrometer.

Soviet Journal of Quantum Electronics•Nov 30, 1980•0 citations

Laboratory work «Study of multiphoton ionization under conditions of resonant excitation of atomic vapors»

I. G. Kirin

The developed laboratory work is described, designed to study multiphoton ionization under conditions of resonant excitation of atomic vapors by frequency-tunable laser radiation. Atomic pairs of potassium and rubidium were chosen as objects of study. To demonstrate the resonant nature of multiphoton ionization, the results of studies of the dependence of the magnitude of the ion signal on the frequency of laser radiation causing this signal are presented. Analytical expressions are given to describe the experimentally observed patterns of resonant ionization processes. Laboratory work is part of a set of works on the study of resonant nonlinear optics for students studying physics at universities.

Učebnaâ fizika.•Jan 1, 2024•0 citations

Interaction of ruby laser radiation with thallium vapor

V N Glazov, M. E. Movsesyan, G. S. Sarkisyan

An experimental investigation was made of the interaction of ruby laser radiation with a vapor of thallium atoms. Several atomic lines in the infrared range were observed and investigated for the first time. These lines were due to multiphoton excitation of the thallium atoms. The dependences of the energies of the infrared emission lines on the intensity of the exciting laser radiation indicated that they appeared because of multiphoton ionization of the atoms. Nonresonant stimulated Raman scattering involving electronic transitions between the 6P1/2 and 6P3/2 levels in the thallium atom was observed and studied. The polarization of the infrared emission lines and of the Raman lines was investigated as a function of the polarization of the exciting laser radiation. The energy efficiency of infrared conversion was ~10−5 %.

Soviet Journal of Quantum Electronics•Sep 30, 1982•0 citations

Resonance multiphoton ionization of alkaline Earth Ca, Ba, Sr atoms

M. A. Tursunov, B.B. Gaibnazarov, Kh. Bakieva +2 more

In this work, we study the process of three-photon resonant ionization of alkaline earth atoms Ca, Sr, and Ba. To carry out the experiments, a frequency-tunable laser setup was created. An effusive beam of alkali atoms served as an atomic target.

E3S Web of Conferences•Jan 1, 2023•2 citations

Multiphoton Ionization of Alkali Atoms

R. N. Compton, Adila Dodhy, John A. D. Stockdale +1 more

Multiphoton ionization (MPI) of alkali atoms has played a pivotal role in our understanding of the interaction of intense electromagnetic radiation with matter. The "hydrogen-like" energy levels and absence of low-lying autoionizing states make the alkali atom theoretically tractable. The low ionization potential of these atomic species and the ease with which one can produce atomic beams of alkali atoms facilitate the experimental studies. Many of the early MPI studies involved high-powered fixed-frequency lasers. Presently, the availability of tunable dye lasers with wavelength extension (i.e., frequency doubling, Raman shifting, etc.) makes it possible to study one- to six-photon ionization of the alkali atom with continuously tunable radiation. Also, harmonic generation in these systems which may be present during ionization can be recorded more easily than in other systems since the radiation generated is in the visible or near ultraviolet spectral region. The ability to tune the laser to high Rydberg states with even or odd numbers of photons accesses electronic states of both parities. Stepwise excitation is capable of selectively producing states of high orbital angular momentum. Experiments in which highly excited states are produced in external electric or magnetic fields allow one to test fundamental ideas about the electron–Coulomb system in the quasi–continuum.3

Topical Meeting on Laser Techniques in the Extreme Ultraviolet•Jan 1, 1984•0 citations

Resonant four-wave frequency mixing in the cw regime in sodium vapor

Vasily G. Arkhipkin, A. L. Vysotin, Im Tkhek-De +2 more

An experimental investigation was made of resonant nonlinear four-wave frequency mixing processes involving cw laser radiation in sodium vapor. It was found that, in spite of an increase in absorption, the use of resonant atomic nonlinearities can substantially improve the frequency conversion efficiency in the cw regime. The results of the measurements were compared with the theoretical conclusions. Ultraviolet radiation was generated at the sum frequency ( λ s = 268 nm) with the proportionality factor C = W s / W 1 W 2 W 3 ≈2W −2

Soviet Journal of Quantum Electronics•Jul 31, 1986•6 citations
An investigation was made of tunable emission of violet radiation from alkali metal vapors involving a fourphoton process using radiation from a single tunable laser. The influence of ionization of the atoms on the parameters of the emitted radiation was also studied. It was established that as the vapor pressure increases, efficient collisional ionization is observed in addition to resonant three-photon ionization and this may result in complete ionization of the atoms.
The developed laboratory work is described, designed to study multiphoton ionization under conditions of resonant excitation of atomic vapors by frequency-tunable laser radiation. Atomic pairs of potassium and rubidium were chosen as objects of study. To demonstrate the resonant nature of multiphoton ionization, the results of studies of the dependence of the magnitude of the ion signal on the frequency of laser radiation causing this signal are presented. Analytical expressions are given to describe the experimentally observed patterns of resonant ionization processes. Laboratory work is part of a set of works on the study of resonant nonlinear optics for students studying physics at universities.
An experimental investigation was made of the interaction of ruby laser radiation with a vapor of thallium atoms. Several atomic lines in the infrared range were observed and investigated for the first time. These lines were due to multiphoton excitation of the thallium atoms. The dependences of the energies of the infrared emission lines on the intensity of the exciting laser radiation indicated that they appeared because of multiphoton ionization of the atoms. Nonresonant stimulated Raman scattering involving electronic transitions between the 6P1/2 and 6P3/2 levels in the thallium atom was observed and studied. The polarization of the infrared emission lines and of the Raman lines was investigated as a function of the polarization of the exciting laser radiation. The energy efficiency of infrared conversion was ~10−5 %.
Multiphoton ionization (MPI) of alkali atoms has played a pivotal role in our understanding of the interaction of intense electromagnetic radiation with matter. The "hydrogen-like" energy levels and absence of low-lying autoionizing states make the alkali atom theoretically tractable. The low ionization potential of these atomic species and the ease with which one can produce atomic beams of alkali atoms facilitate the experimental studies. Many of the early MPI studies involved high-powered fixed-frequency lasers. Presently, the availability of tunable dye lasers with wavelength extension (i.e., frequency doubling, Raman shifting, etc.) makes it possible to study one- to six-photon ionization of the alkali atom with continuously tunable radiation. Also, harmonic generation in these systems which may be present during ionization can be recorded more easily than in other systems since the radiation generated is in the visible or near ultraviolet spectral region. The ability to tune the laser to high Rydberg states with even or odd numbers of photons accesses electronic states of both parities. Stepwise excitation is capable of selectively producing states of high orbital angular momentum. Experiments in which highly excited states are produced in external electric or magnetic fields allow one to test fundamental ideas about the electron–Coulomb system in the quasi–continuum.3
An experimental investigation was made of resonant nonlinear four-wave frequency mixing processes involving cw laser radiation in sodium vapor. It was found that, in spite of an increase in absorption, the use of resonant atomic nonlinearities can substantially improve the frequency conversion efficiency in the cw regime. The results of the measurements were compared with the theoretical conclusions. Ultraviolet radiation was generated at the sum frequency ( λ s = 268 nm) with the proportionality factor C = W s / W 1 W 2 W 3 ≈2W −2