Three-photon resonantly enhanced third harmonic generation in a collisionally self-broadened gas of two-level atoms, appropriately buffered to allow phase matching, achieves maximum output when the input frequency is sufficiently detuned from exact resonance to avoid excessive self-absorption of the third harmonic. For a given active gas density or laser detuning there exists a relation between the buffer gas density, active gas density and laser detuning which maximizes the third harmonic intensity. The optimal combination depends only on the physical characteristics of the tripling medium and the buffer gas. When the third harmonic is maximized the absorption coefficient alpha and the sample length L combine so that alpha L is of order unity. The characteristics of three-photon resonantly enhanced third harmonic generation in a buffered gas are analysed in detail.Three-photon resonantly enhanced third harmonic generation in a collisionally self-broadened gas of two-level atoms, appropriately buffered to allow phase matching, achieves maximum output when the input frequency is sufficiently detuned from exact resonance to avoid excessive self-absorption of the third harmonic. For a given active gas density or laser detuning there exists a relation between the buffer gas density, active gas density and laser detuning which maximizes the third harmonic intensity. The optimal combination depends only on the physical characteristics of the tripling medium and the buffer gas. When the third harmonic is maximized the absorption coefficient alpha and the sample length L combine so that alpha L is of order unity. The characteristics of three-photon resonantly enhanced third harmonic generation in a buffered gas are analysed in detail.

Journal of Physics B Atomic Molecular and Optical PhysicsJun 28, 19915 citations

Quantitative Analysis of Resonant Third Harmonic Generation in Sr-Xe Mixtures

H. Scheingraber, H. B. Puell, C. R. Vidal

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 19770 citations

Third-harmonic generation and multiphoton ionization in rare gases

John C. Miller, R. N. Compton

Resonantly enhanced multiphoton ionization (MPI) and third-harmonic generation (THG) have been concurrently studied in the rare gases, xenon, krypton, and argon. The disappearance with increasing pressure of the MPI signals resonant with the three-photon allowed $6s$ , $5s$ , and $4s$ states, respectively, of the rare gases is linked to the appearance of THG. Conversely, THG is shown to be partially quenched at certain wavelengths by one- and two-photon absorption leading to ionization.Resonantly enhanced multiphoton ionization (MPI) and third-harmonic generation (THG) have been concurrently studied in the rare gases, xenon, krypton, and argon. The disappearance with increasing pressure of the MPI signals resonant with the three-photon allowed $6s$, $5s$, and $4s$ states, respectively, of the rare gases is linked to the appearance of THG. Conversely, THG is shown to be partially quenched at certain wavelengths by one- and two-photon absorption leading to ionization.

Physical Review AApr 1, 1982102 citations

6s

5s

, and

4s

states, respectively, of the rare gases is linked to the appearance of THG. Conversely, THG is shown to be partially quenched at certain wavelengths by one- and two-photon absorption leading to ionization.