The accuracy of atomic sensor is determined by the transverse nuclear spin relaxation time (T). As the longitudinal nuclear spin relaxation time (T) is the upper limit of T, it becomes an important metric for evaluating the merits of alkali vapor cells. However, the conventional method for measuring T of pulse delay takes dozens of minutes, which will increase the effect of random errors during the testing process. In order to solve this problem, a method to quickly estimate the value of T is proposed by suppressing the influence of spin exchange relaxation and magnetic field gradient relaxation terms on T. Experimental results indicate that the accuracy is maintained at above 95%, and the testing time is reduced to less than 5%.
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| http://dx.doi.org/10.1364/OE.522737 | DOI Listing |
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