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- W132580167 abstract "A reduction of the width of optical resonances below the limit imposed by the natural lifetimes has long been a subject of considerable interest (see e.g. /1/ and refs therein). Recently, we have reported on new signals with subnatural linewidths in a polarization spectrsocopy (PS) experiment on sodium vapor /2,3/. The most characteristic feature of the signals is an additional narrow structure superimposed on the Dopper-free power broadened resonances. These structures (dips) can be as narrow as 2.6 MHz for the Na D1 line, whereas the natural linewidth of this transition is 10 MHz. The dips appear only for those transitions where optical pumping (either Zeeman, or hyperfine) is possible, and even if the light beams are too weak to include saturation effects. The appearance of the dips depends substantially on the interaction time of atoms with the light fields. The apparatus for observation of the new subnatural structures is a typical PS arrangement with a narrow-band dye laser, circular pump beam and linear probe beam polarizations, supplemented with magnetic shields and with provision for changing the diameter of the light beams, i.e. the interaction times." @default.
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- W132580167 date "1987-01-01" @default.
- W132580167 modified "2023-09-25" @default.
- W132580167 title "Optical Resonances with Subnatural Linewidths Resulting from Nonstationary Optical Pumping" @default.
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- W132580167 doi "https://doi.org/10.1007/978-3-540-47973-4_91" @default.
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