An investigation of the 2f—wavelength modulation technique for detection of atoms under optically thin as well as thick conditions
| Autor: | Per Ljung, Dorys Rojas, Ove Axner |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Condensed Matter::Quantum Gases
business.industry Chemistry Physics::Optics chemistry.chemical_element Optical modulation amplitude Signal Atomic and Molecular Physics and Optics Atomic mass Analytical Chemistry Rubidium Amplitude modulation Optics Modulation Demodulation Physics::Atomic Physics business Spectroscopy Instrumentation |
| Zdroj: | Spectrochimica Acta Part B: Atomic Spectroscopy. 52:1663-1686 |
| ISSN: | 0584-8547 |
| DOI: | 10.1016/s0584-8547(97)00056-6 |
| Popis: | An investigation of the 2f-wavelength modulation (WM) technique for detection of atoms under optically thin as well as thick conditions is presented. A program that simulates the entire process of laser light modulation, atomic absorption and signal demodulation has been constructed. The dependence of the 2f-WM signal upon frequency amplitude modulation and detuning for a variety of atomic masses (i.e. optical densities) is investigated in detail. It is shown, among other things, that the 2f-WM ( S ¯ 2 f - r ) signal strength is either a dual-or a quadrupled-valued function of optical density. Despite this, it shown that the 2f-WM technique can be used, by suitable choices of the frequency amplitude modulation and detuning, for detection of atoms also under optically thick conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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