Investigation of coherent population trapping signals in 87Rb cells with buffer gas

18th International Conference PhysicA.SPb

Fedorov, M.I.^1 ; Ermak, S.V.^1 ; Petrenko, M.V.^2 ; Pyatyshev, E.N.^3 ; Semenov, V.V.^1

Institute of Physics, Nanotechnology and Telecommunications, Peter the Great Saint Petersburg Polytechnic University, 29 Politekhnicheskaya str., St.-Petersburg

195251, Russia^1

Ioffe Physical Technical Institute, 26 Politekhnicheskaya str., St.-Petersburg

194021, Russia^2

Laboratory of Nano- and Microsystem Techniques, Peter the Great Saint Petersburg Polytechnic University, 29 Politekhnicheskaya str., St.-Petersburg

195251, Russia^3

关键词: Absorption signals;    Buffer gas pressure;    Cell temperature;    Coherent population trapping;    Integrated technologies;    Narrow linewidth lasers;    Optimum conditions;    Relative frequencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012046/pdf
DOI  :  10.1088/1742-6596/769/1/012046

来源: IOP

【 摘 要 】

Characteristics of CPT (coherent population trapping) signal are investigated in small-size glass vapor cells containing87Rb and Ne buffer gas with narrow linewidth laser pumping on D2line. Parameters of CPT absorption signals are measured using small-size vapor cells with Ne buffer gas pressure in range of 200-400 Torr, cell temperature in range of 65-120 °C and values of laser pumping power of 30-400 μW/cm2. Optimum conditions, under which the minimal value of short-term instability of resonance line is achieved, are obtained in experiments. CPT signals using vapor cells based on integrated technologies containing87Rb in atmosphere of Ne are also investigated. The CPT signals with typical linewidths 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 10-11at 100 s.