An increase in the sensitivity of the saturated absorption method in the multimode regime

被引：5

作者：

Baklanov, E. V. ^{[1
]}

Kurbatov, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Laser Phys, Siberian Branch, Novosibirsk 630090, Russia

来源：

OPTICS AND SPECTROSCOPY | 2013年 / 114卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

Atom lasers - Atoms - Laser beams - Laser spectroscopy;

D O I：

10.1134/S0030400X13030041

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A possibility for an increase in the signal-to-noise ratio in the laser spectroscopy that is free of Doppler broadening and is based on the saturated absorption is considered. The application of the counter-propagating laser beams in the multimode regime is proposed. The number of atoms that effectively interact with the field, and, hence, the intensity of a narrow resonance in the line shape can be increased due to the interaction of the counterpropagating modes with different frequencies. It is demonstrated that, for the intrinsic photon noise, the signal-to-noise ratio can be increased by a factor of aeN, where N is the number of modes. For the remaining noises (fluctuations of the radiation power, noise of photodetector, etc.), the signal-to-noise ratio can be increased by a factor of N. DOI: 10.1134/S0030400X13030041

引用

页码：463 / 466

页数：4

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