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Rb saturation spectroscopy with an optically narrowed FM diode laser |
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| Authors: | G.P. Barwood P. Gill W.R.C. Rowley |
| Affiliation: | aDivision of Mechanical and Optical Metrology, National Physical Laboratory, Queens Road, Teddington, Middx TW11 0LW, UK |
| Abstract: | A fast-frequency modulated (FM) diode laser has been optically narrowed using the technique of resonant optical feedback, to provide linewidths in each FM mode of ≈ 200 kHz peak-to-peak. With a drive frequency of 50 MHz and modulation index of 0.2, the FM laser has been used for the first time to obtain Doppler-free FM spectra of the Rb D1 line at 795 nm. The potential use of this system for laser frequency stabilisation is discussed. |
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