Measurement of nanoangström oscillatory displacements by a gas laser with a small natural linewidth
| Autor: | V. M. Gelikonov |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Quantum optics
Physics Nuclear and High Energy Physics Gas laser business.industry Oscillation Astronomy and Astrophysics Statistical and Nonlinear Physics Laser Electronic Optical and Magnetic Materials law.invention Power (physics) Resonator Laser linewidth Cardinal point Optics law Electrical and Electronic Engineering business |
| Zdroj: | Radiophysics and Quantum Electronics. 41:998-1006 |
| ISSN: | 1573-9120 0033-8443 |
| DOI: | 10.1007/bf02676469 |
| Popis: | A new He-Ne laser (0.63 μm) with a wide region of single-mode oscillation (2 GHz) obtained by selection of longitudinal modes with the use of an absorption cell at the mode nodal point has been developed. By measurement of natural fluctuations of the radiation frequency in such a laser, we found that the natural component of the linewidth is 0.001 Hz for a 2.7-fold exceeding of the laser threshold and output power 1 mW. Using this level of monochromaticity, we measured ultrasmall oscillatory displacements of several tens of nanoangstroms (8·10−18 m) corresponding to a relative change in resonator length by about 6·10−18. |
| Databáze: | OpenAIRE |
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