Coherent population trapping in small- and chip-scale 87Rb vapor cells with buffer gas
Abstract
The characteristics of coherent population trapping (CPT) signal were investigated in small-size glass vapor cells containing 87Rb and Ne buffer gas with narrow line-width laser pumping on D2 line. The parameters of CPT signals were measured using small-size vapor cells with Ne buffer gas pressure in the range of 200-400 Torr, cell temperature in the range of 65-120 ∘C and the values of laser pumping power of 30-400 μW/cm2. Optimal conditions, under which the minimal value of short-term instability of resonance line is achieved, were obtained in experiments. Orientation frequency shifts of CPT resonance using glass 87Rb vapor cells containing buffer gas and anti-relaxation coating were compared. CPT signals using vapor cells based on integrated technologies containing 87Rb in atmosphere of Ne were also investigated. The CPT signals with typical line widths of 2-3 kHz and signal-to-noise ratio of 1500 in 1 Hz bandwidth are observed, which allows one to provide relative frequency instability of 10-11 at 100 s.
- Publication:
-
International Journal of Modern Physics Conference Series
- Pub Date:
- March 2016
- DOI:
- 10.1142/S2010194516601381
- Bibcode:
- 2016IJMPS..4160138E
- Keywords:
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- Optical pumping;
- coherent population trapping;
- vapor cells;
- resonance signal;
- 42.50.Gy;
- 06.30.Ft;
- Effects of atomic coherence on propagation absorption and amplification of light;
- electromagnetically induced transparency and absorption;
- Time and frequency