Coherent population trapping in small- and chip-scale 87Rb vapor cells with buffer gas

• Published in: International journal of modern physics. Conference series 2016, Vol.41, p.1660138
• Main Authors: Ermak, S. V., Semenov, V. V., Petrenko, M. V., Pyatyshev, E. N.
• Format: Article
• Language: English
• Subjects: Buffers; Frequency stability; Gas pressure; Glass; Laser pumping; Trapping; Vapors
• ISSN: 2010-1945; 2010-1945
• DOI: 10.1142/S2010194516601381

The characteristics of coherent population trapping (CPT) signal were investigated in small-size glass vapor cells containing 8 7 Rb 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 μ W/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 8 7 Rb vapor cells containing buffer gas and anti-relaxation coating were compared. CPT signals using vapor cells based on integrated technologies containing 8 7 Rb 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 − 1 1 at 100 s.