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Opt Lett. 1985 Dec 01;10(12):597-9. doi: 10.1364/ol.10.000597.

Laser spectroscopy using beam-overlap modulation.

Optics letters

T P Duffey, D Kammen, A L Schawlow, S Svanberg, H R Xia, G G Xiao, G Y Yan

PMID: 19730497 DOI: 10.1364/ol.10.000597

Abstract

A new Doppler-free laser spectroscopy method is demonstrated that employs modulation of the position of a laser beam rather than the commonly used intensity or polarization modulation. The technique is applicable in saturated absorption as well as fluorescence measurements, as is illustrated in experiments on sodium and iodine lines. A particular feature of the method is that Doppler- and background-free fluorescence spectra can be recorded without using intermodulation techniques.

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