The dynamic Stark effect on the as Q (5,4) transition of the 0 → 1 vibrational band of the ν 2 mode of ammonia 15 NH 3 was studied by the method of copropagating waves of radiation of two 13 CO 2 lasers operating at the R (18) I line. For waves with mutually orthogonal polarizations, which propagated in a waveguide cell, the intensity of the saturating radiation reached 225 W/cm 2 , and the absorption line of the probing radiation had the form of a two-hump curve with a splitting that was consistent with the Rabi frequency for the ammonia transition being investigated. At the maximum intensity of the saturating radiation, complete transparency was observed at the center of the absorption line of 15 NH 3 . When identically polarized saturating and probing waves propagating in a cell at a small angle with respect to each other were used, the splitting was more weakly manifested. The effect of a spatial inhomogeneity of the optical fields on the shape of the line of saturated absorption is discussed.The dynamic Stark effect on the as Q (5,4) transition of the 0 → 1 vibrational band of the ν 2 mode of ammonia 15 NH 3 was studied by the method of copropagating waves of radiation of two 13 CO 2 lasers operating at the R (18) I line. For waves with mutually orthogonal polarizations, which propagated in a waveguide cell, the intensity of the saturating radiation reached 225 W/cm 2 , and the absorption line of the probing radiation had the form of a two-hump curve with a splitting that was consistent with the Rabi frequency for the ammonia transition being investigated. At the maximum intensity of the saturating radiation, complete transparency was observed at the center of the absorption line of 15 NH 3 . When identically polarized saturating and probing waves propagating in a cell at a small angle with respect to each other were used, the splitting was more weakly manifested. The effect of a spatial inhomogeneity of the optical fields on the shape of the line of saturated absorption is discussed.

Optics and SpectroscopyJul 1, 20018 citations

Theory of Optical-Microwave Double Resonance. III. Double Resonance with Off-Resonant Optical Radiation

Michio Takami

The theory of optical-microwave double resonance is extended to the case of the off-resonant optical field. Line shapes for fixed optical and variable microwave frequencies are calculated under various conditions by the density matrix method. Analytical expressions are given for small microwave or small optical saturation. When the off-resonance is much greater than the Doppler width of the optical transition, optical Stark effect and optical-microwave two-photon transition are the principal effects. When the signal is observed as a variation of microwave absorption, the former effect is much stronger than the latter. When the signal is detected optically, the two-photon and the stepwise transitions for small microwave saturation are the effects with the same order of magnitude, while the optical Stark effect is a secondary effect. The line shapes are also calculated numerically for arbitrary microwave and optical saturation.The theory of optical-microwave double resonance is extended to the case of the off-resonant optical field. Line shapes for fixed optical and variable microwave frequencies are calculated under various conditions by the density matrix method. Analytical expressions are given for small microwave or small optical saturation. When the off-resonance is much greater than the Doppler width of the optical transition, optical Stark effect and optical-microwave two-photon transition are the principal effects. When the signal is observed as a variation of microwave absorption, the former effect is much stronger than the latter. When the signal is detected optically, the two-photon and the stepwise transitions for small microwave saturation are the effects with the same order of magnitude, while the optical Stark effect is a secondary effect. The line shapes are also calculated numerically for arbitrary microwave and optical saturation.

Japanese Journal of Applied PhysicsJan 1, 197811 citations

Dependence on light amplitude of the dynamic stark splitting of an optical line

Alfred Schabert, R. Keil, P. E. Toschek

Optics CommunicationsMar 1, 197553 citations

Exciton-exciton annihilation and saturation effect in Tb F3

M.‐F. Joubert, B. Jacquier, R. Moncorgé

Blue ($^{5}D_{4}\ensuremath{\rightarrow}^{7}F_{6}$) as well as uv anti-Stokes ($^{5}D_{3}\ensuremath{\rightarrow}^{7}F_{6}$) fluorescences are observed in Tb ${\mathrm{F}}_{3}$ at low temperature when the $^{5}D_{4}$ Stark components of the ${\mathrm{Tb}}^{3+}$ active ions are excited. In addition, when the $^{5}D_{4}$ exciton density is high enough, holes appear in the center of each excitation line of the visible emission, and in the corresponding absorption spectrum as well. Fluorescence dynamics and intensities are then studied for increasing pump powers. These properties are expressed as combinations of exciton-exciton annihilation and cross-relaxation processes. Saturation effects on both intrinsic and perturbed ${\mathrm{Tb}}^{3+}$ ions are discussed.Blue ($^{5}D_{4}\ensuremath{\rightarrow}^{7}F_{6}$) as well as uv anti-Stokes ($^{5}D_{3}\ensuremath{\rightarrow}^{7}F_{6}$) fluorescences are observed in Tb${\mathrm{F}}_{3}$ at low temperature when the $^{5}D_{4}$ Stark components of the ${\mathrm{Tb}}^{3+}$ active ions are excited. In addition, when the $^{5}D_{4}$ exciton density is high enough, holes appear in the center of each excitation line of the visible emission, and in the corresponding absorption spectrum as well. Fluorescence dynamics and intensities are then studied for increasing pump powers. These properties are expressed as combinations of exciton-exciton annihilation and cross-relaxation processes. Saturation effects on both intrinsic and perturbed ${\mathrm{Tb}}^{3+}$ ions are discussed.

Physical review. B, Condensed matterOct 1, 198321 citations

Blue ($^{5}D_{4}\ensuremath{\rightarrow}^{7}F_{6}$) as well as uv anti-Stokes ($^{5}D_{3}\ensuremath{\rightarrow}^{7}F_{6}$) fluorescences are observed in Tb

{\mathrm{F}}_{3}

at low temperature when the

^{5}D_{4}

Stark components of the

{\mathrm{Tb}}^{3+}

active ions are excited. In addition, when the

^{5}D_{4}

exciton density is high enough, holes appear in the center of each excitation line of the visible emission, and in the corresponding absorption spectrum as well. Fluorescence dynamics and intensities are then studied for increasing pump powers. These properties are expressed as combinations of exciton-exciton annihilation and cross-relaxation processes. Saturation effects on both intrinsic and perturbed

{\mathrm{Tb}}^{3+}

ions are discussed.