Investigation of the absorption spectrum of a two-level system in intense nonmonochromatic radiation fields
Abstract
The paper investigates the change in the absorption-line shape of weak radiation emitted by the Zeeman-splitting levels of Cd-113 atoms under the action of Gaussian-noise emission. Under strongly nonresonant action, an increase in the noise-field intensity is found to result in saturation of the shift in the absorption-line peak, line broadening, and a strong increase in absorption-coefficient variations. It is shown that the magnitude of line broadening is proportional to the square of field intensity in the low-saturation region, but is proportional just to field intensity in the high-saturation region. A theory is developed for the action of a nonresonant noise field, the results are used to predict the nature of changes in atomic energy structure in the nonresonant radiation fields of multimode lasers.
- Publication:
-
Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki
- Pub Date:
- February 1976
- Bibcode:
- 1976ZhETF..70..445B
- Keywords:
-
- Absorption Spectra;
- Cadmium Isotopes;
- Laser Modes;
- Radiation Distribution;
- Spectrum Analysis;
- Zeeman Effect;
- Atomic Energy Levels;
- Noise Spectra;
- Phase Shift;
- Random Noise;
- Spectral Line Width;
- Lasers and Masers