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Proceedings Paper

New method for enhancement of contrast of coherent population trapping resonance in Rb vapour
Author(s): Sergey Khripunov; Sergey Kobtsev; Daba Radnatarov; Ivan Popkov; Valeriy Andryushkov; Tatiana Steschenko; Vladimir Lunin; Yury Zarudnev
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Paper Abstract

The present work presents a new method for enhancement of contrast of coherent population trapping resonance in Rb vapour based on feedback and fast digital processing of the error signal in the feedback loop. In the proposed method, when the frequency difference between the pump field components is detuned from the resonance of coherent population trapping, a linear combination of two measured values, — pump field power prior and after passing through the cell, — is stabilised. This parameter combination is stabilised through adjustment of the pump radiation power with an electrooptical amplitude modulator. The studied method is shown to improve CPT resonance contrast by more than two orders of magnitude, while also improving the signal-to-noise ratio more than two-fold. The possibilities and limitations of the proposed method for enhancement of CPT resonance contrast are analysed.

Paper Details

Date Published: 20 February 2017
PDF: 6 pages
Proc. SPIE 10119, Slow Light, Fast Light, and Opto-Atomic Precision Metrology X, 1011905 (20 February 2017); doi: 10.1117/12.2251522
Show Author Affiliations
Sergey Khripunov, Novosibirsk State Univ. (Russian Federation)
Sergey Kobtsev, Novosibirsk State Univ. (Russian Federation)
Daba Radnatarov, Novosibirsk State Univ. (Russian Federation)
Ivan Popkov, Novosibirsk State Univ. (Russian Federation)
Valeriy Andryushkov, Novosibirsk State Univ. (Russian Federation)
Tatiana Steschenko, Novosibirsk State Univ. (Russian Federation)
Vladimir Lunin, Novosibirsk State Univ. (Russian Federation)
Yury Zarudnev, Novosibirsk State Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 10119:
Slow Light, Fast Light, and Opto-Atomic Precision Metrology X
Selim M. Shahriar; Jacob Scheuer, Editor(s)

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