C
Ch. Andreeva
Researcher at Bulgarian Academy of Sciences
Publications - 20
Citations - 306
Ch. Andreeva is an academic researcher from Bulgarian Academy of Sciences. The author has contributed to research in topics: Laser & Hyperfine structure. The author has an hindex of 6, co-authored 16 publications receiving 283 citations.
Papers
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Journal ArticleDOI
Coherent effects on the Zeeman sublevels of hyperfine states in optical pumping of Rb by monomode diode laser
TL;DR: In this paper, the coherent population trapping on the D and D lines of Rb at a 12 single hyperfine transition using the Zeeman sublevels of the hyperfine states is reported.
Journal ArticleDOI
Coherent spectroscopy of degenerate two-level systems in Cs
Ch. Andreeva,Stefka Cartaleva,Yordanka Dancheva,Valerio Biancalana,Alessia Burchianti,Carmela Marinelli,Emilio Mariotti,Luigi Moi,K. Nasyrov +8 more
TL;DR: In this article, a theoretical model has been elaborated, taking into account the Doppler broadening of the transitions, the linewidth of the laser light, and the experimental conditions for observation of the fluorescence.
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Light-shift suppression in laser optically pumped vapour-cell atomic frequency standards
Christoph Affolderbach,Ch. Andreeva,Stefka Cartaleva,Todor Karaulanov,Gaetano Mileti,Dimitar Slavov +5 more
TL;DR: In this paper, a scheme for reducing the AC Stark effect in optical-microwave double-resonance spectroscopy and its application for efficient suppression of the light-shift-related instabilities in laser-pumped gas-cell atomic clocks was presented.
Journal ArticleDOI
Coherent effects on the Zeeman sublevels of hyperfine states at the D1 and D2 lines of Rb
TL;DR: In this article, the sign and amplitude of the resonances in the fluorescence are measured by scanning the laser frequency over the hyperfine (hf) transitions of the Rb D1 and D2 lines.
Journal ArticleDOI
Continuously Tunable Extended Cavity Diode Laser at 780 nm for High Resolution Spectroscopy
TL;DR: In this paper, a wide continuous frequency tuning range was achieved by applying translation-rotational movement of the grating together with appropriate injection current correction, achieving the maximum of each fine component of the Rb D2 line.