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Proceedings Paper

DARK-STATE RESONANCES OBSERVED ON THE D2 LINE OF POTASSIUM
Author(s): A. Krasteva; S. Gateva; C. Andreeva; G. Alzetta; S. Gozzini; L. Moi; D. Sarkisyan; K. Nasyrov; S. Cartaleva
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Paper Abstract

We report the first observation of sub-natural-width dark resonances of enhanced transparency on the D2 line of potassium, contained in an optical cell with reduced (8mm) dimensions and buffered by 30Torr of Ne. The Potassium vapours are irradiated by a frequency modulated DFB diode laser light (with λ = 766.7nm and 2MHz bandwidth), and are placed in orthogonal to the light magnetic field scanned around zero value. Very good signal-to-noise ratio and narrow (∼20kHz) dark resonances are observed and studied in unshielded laboratory environment. The dark resonance formation is related to coherent superposition of the ground-state Zeeman sublevels by respective components of the frequency-modulated light.

Paper Details

Date Published: 5 January 2017
PDF: 8 pages
Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 102260L (5 January 2017); doi: 10.1117/12.2264223
Show Author Affiliations
A. Krasteva, Institute of Electronics (Bulgaria)
S. Gateva, Institute of Electronics (Bulgaria)
C. Andreeva, Institute of Electronics (Bulgaria)
G. Alzetta, Istituto Nazionale di Ottica del CNR (Italy)
S. Gozzini, Istituto Nazionale di Ottica del CNR (Italy)
L. Moi, Istituto Nazionale di Ottica del CNR (Italy)
D. Sarkisyan, Institute for Physical Research (Armenia)
K. Nasyrov, Institute of Automation and Electrometry (Russian Federation)
S. Cartaleva, Institute of Electronics (Bulgaria)


Published in SPIE Proceedings Vol. 10226:
19th International Conference and School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Sanka Gateva; Albena Daskalova; Alexandros Serafetinides, Editor(s)

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