Experimental study on methods minimizing the influence of velocity-changing collisions in Doppler-free saturation spectroscopy
| Autor: | D. Ashkenasi, G. Klemz, H.-D. Kronfeldt |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Materials science
Absorption spectroscopy business.industry Amplifier Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention symbols.namesake Direct-conversion receiver Optics law Frequency domain symbols Electrical and Electronic Engineering Physical and Theoretical Chemistry business Saturation (chemistry) Spectroscopy Doppler effect |
| Zdroj: | Optics Communications. 110:549-554 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/0030-4018(94)90248-8 |
| Popis: | A method based on homodyne mixing is described which facilitates the use of rf-modulation of the pump beam for laser saturation spectroscopy together with conventional kHz lock-in amplifiers yielding a substantial reduction of disturbing pedestals present due to collisions in an atomic vapour. The technique benefits also from the significant improvement in the signal to noise ratio when transferring the Doppler-free signal to a frequency domain of several MHz where the interfering laser noise is low. These experimental procedures allow measurements of high quality saturated absorption spectra in vapour cells of otherwise unfavourable high gas pressure such as in commercial see-through hollow-cathodes. In addition we report the detection of an optogalvanic signal at rf-modulation (3.3 MHz). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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