BRIEF COMMUNICATIONS: Parametric noise in a nonlinear frequency up-converter of infrared signals by two-photon pumping of 3S-3D and 3S-5S transitions in sodium vapor
Abstract
A systematic analysis was made of the spectral characteristics of resonance four-photon parametric conversion of infrared radiation as a result of two-photon resonance pumping of the 3S-3D and 3S-5S transitions in sodium and the influence of these characteristics on the threshold sensitivity of a parametric conversion detector was investigated. An experimental study was made of the characteristics of the noise radiation generated as a result of hyperparametric scattering. The results obtained can be used to select the optimal parameters of high-sensitivity detectors of weak infrared signals by parametric conversion in alkali metal vapors.
- Publication:
-
Quantum Electronics
- Pub Date:
- July 1985
- DOI:
- 10.1070/QE1985v015n07ABEH007310
- Bibcode:
- 1985QuEle..15.1009G