Linewidth of collimated wavelength-converted emission in Rb vapours
arXiv:1301.7117 · doi:10.1007/s00340-014-5823-0
Abstract
We present a study of the spectral linewidth of collimated blue light (CBL) that results from wave mixing of low-power cw laser radiation at 780 nm and 776 nm and an internally-generated mid-IR field at 5.23 um in Rb vapour. Using a high-finesse Fabry-Perot interferometer the spectral width of the CBL is found to be less than 1.3 MHz for a wide range of experimental conditions. We demonstrate that the CBL linewidth is mainly limited by the temporal coherence of the applied laser fields rather than the atom-light interaction itself. Results obtained with frequency modulated laser light allow an upper limit of several hundred kHz to be set for the linewidth of the collimated mid-IR radiation at 5.23 um, which has not been directly detected.
9 pages, 6 figures
References in corpus (8)
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- Improved detection of small atom numbers through image processing
- Coherent 455nm beam production in cesium vapor
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Cited by in corpus (7)
- Distinguishing nonlinear processes in atomic media via orbital angular momentum transfer
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- Parametric wave mixing enhanced by velocity insensitive two-photon excitation in Rb vapour
- Amplified spontaneous emission at 5.23 um in two-photon excited Rb vapour
- Optical cavity for enhanced parametric four-wave mixing in rubidium
- Saturation and alternate pathways in four-wave mixing in rubidium
- Coherent amplitude modulation of continuous-wave light in cesium vapor