Abstract

We studied the relationship between the frequency shift of coherent population trapping resonance and the cell temperature of ${}^{85}\mathrm{Rb}$. Results show that the temperature coefficient of the frequency shift can be reduced by buffer gas pressure adjustment and light shift optimization. When the contribution of buffer gas collision to temperature coefficient of frequency shift is less than $0.3\mathrm{Hz}/\mathrm{K}$, the contribution of light shift to the temperature coefficient of frequency shift becomes obvious. Under this cancelling effect, we can reduce the rate of total frequency shift to near zero.

© 2011 Optical Society of America

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