Temperature control of vapor cell based on the light absorption of nuclear magnetic resonance gyroscope

The temperature stability of the vapor cell plays an important role in improving the performance of the nuclear magnetic resonance gyroscope. It's meaningful to explore an approach for temperature stabilization of the vapor cell based on the light intensity of nuclear magnetic resonance gyroscope's probe laser. The negative correlation between the light intensity of the probe laser and the temperature of the vapor cell was analyzed theoretically. Then the concrete corresponding fitting curve about temperature and the light intensity was obtained experimentally. Furthermore, a LabView program for the feedback control of the temperature was designed, which achieved the temperature stabilization of the vapor cell. Finally, the experimental results validated the proposed approach in stabilizing the temperature of the vapor cell, which had advantages of high sensitivity and accuracy. The achieved long-term temperature drift is within 0.02℃/h.