A narrowband R-type resonance is formed in a Λ-system, on the D₁ line of Rb atomic vapor using two continuous diode lasers with λ=795 nm. A 8mm- long cell filled with the Rb vapor and 20 Torr neon gas has been used. We have shown that use of an additional (3^rd) laser which is resonant with the Rb D₂ line (λ=780 nm) makes it possible to control the amplitude and sign of the R -type resonance, i.e. to convert a resonance which demonstrates increase in absorption into one which demonstrates reduction in absorption. The good signal/noise ratio of the observed resonance allows us to follow its behavior in an applied magnetic field from several gauss to several hundred gauss. A description in terms of double-Λ systems allows us to explain the experimental results in a simple manner.

Date Published: 8 January 2015
PDF: 6 pages
Proc. SPIE 9447, 18th International School on Quantum Electronics: Laser Physics and Applications, 944707 (8 January 2015); doi: 10.1117/12.2177887

Published in SPIE Proceedings Vol. 9447:
18th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Sanka Gateva; Alexandros Serafetinides, Editor(s)