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Laser Spectroscopy

PREPARATION OF A MONOENERGETIC SODIUM BEAM BY LASER COOLING AND DEFLECTION; AND BROAD BAND LASER COOLING ON NARROW TRANSITIONS

J. Nellessen, K. Sengstock, Jörg Helge Müller, Wolfgang A. Ertmer, Hartmut Wallis, Wolfgang A. Ertmer

Published Jan 1, 1989• 0 citations
Publisher
DOI
10.1016/b978-0-12-251930-7.50012-1

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Using a sodium Raman laser that is pumped by a single-frequency cw dye laser, we have measured the narrow-band Raman gain that exists in the vicinity of the sodium D(1) line. Large gains (>10 cm(-1)) are measured at moderate pump intensities and sodium densities. The high gain allows us to detect directly a 1.772-GHz beat on the pump beam after it makes only a single pass through the sodium cell. By scanning the frequency of the sodium Raman laser while keeping the pump intensity and frequency constant, we are able to map out the Raman gain profile. The narrowness of the Raman gain is consistent with the narrow beat signal between the Raman-laser beam and the pump beam that was reported earlier [Opt. Lett. 16, 1853 (1991)].