微波腔镀银实现漫反射冷却的实验研究

观测到了使用镀银微波腔产生漫反射光场冷却原子的信号，完成了微波腔与积分球一体化的最后一步。这种冷却方式结构更加简单，且没有涂料，不会对微波场场型造成影响，有利于钟信号的信噪比及对比度提高。同时测试了微波腔冷却在不同冷却光注入方案、漫反射系数及腔表面开孔尺寸下的冷却性能。结果表明端面注入冷却光是目前获得更多冷原子数目的方法，提高腔表面的漫反射系数，可以显著提高冷原子数目。为了充分利用积分球内的冷原子，采用了10 mm的通光孔径，测试了不同通光孔径对冷原子信号的影响，证实了目前较大的通光孔径不会影响到冷原子数。

Abstract

The cold atom absorption signal produced by the silver plated microwave cavity is observed, which finishes the last step of the integration of the microwave cavity and the integrating sphere. This setup which doesn′t use reflective material and won′t influence the magnetic field distribution is not only simpler, but also benefit for the signal to noise ratio of the clock signal. Meanwhile, the cooling performances of the cooling microwave cavity are studied with different cooling light injection schemes, diffuse reflective coefficients and apertures. The results show that the scheme of injecting the cooling light from the end surface can get more cold atoms, and the improvement of the reflective coefficient increases the cold atom numbers. Two 10 mm apertures are used in order to take full advantage of cold atoms in the integrating sphere, and the absorption signals for different apertures show that the 10 mm apertures used here won′t affect the cold atom number.

参考文献

[1] W Ketterle, A Martin, M A Joffe, et al.. Slowing and cooling atoms in isotropic laser light [J]. Phys Rev Lett, 1992, 69(17): 2483-2486.

[2] F X Esnault, N Rossetto, D Holleville, et al.. HORACE: a compact cold atom clock for Galileo [J]. Adv Space Res, 2011, 47: 854-858.

[3] H Cheng, W Zhang, H Ma, et al.. Laser cooling of rubidium atoms from background vapor in diffuse light [J]. Phys Rev A, 2009, 79(2): 023407.

[4] X Wang, H Cheng, B Zheng, et al.. Integrating sphere cold atom clock with cylindrical microwave cavity [C]. Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International, 2011. 1-3.

[5] 孟艳玲, 高源慈, 郑本昌, 等. 积分球与微波腔一体化装置的研制[J]. 中国激光, 2014, 41(9): 0918001.

Meng Yanling, Gao Yuanci, Zheng Benchang, et al.. Design for the integration of integrating sphere and microwave cavity [J]. Chinese J Lasers, 2014, 41(9): 0918001.

[6] 马红玉, 成华东, 张文卓, 等. 积分球内的铷原子激光冷却[J]. 物理学报, 2009, 58(3): 1569-1573.

Ma Hongyu, Cheng Huadong, Zhang Wenzhuo, et al.. Laser cooling of rubidium atoms in an integrating sphere [J]. Acta Physica Sinica, 2009, 58(3): 1569-1573.

[7] Wang Xucheng, Cheng Huadong, Xiao Ling, et al.. Measurement of spatial distribution of cold atoms in an integrating sphere [J]. Chin Phys Lett, 2012, 29(2): 023701.

[8] Meng Yanling, Cheng Huadong, Zheng Benchang, et al.. Controlling the shape of a cold atom cloud in a cylindrical cavity [J]. Chin Phys Lett, 2013, 30(6): 063701.

[9] E Guillot, P E Pottie, C Valentin, et al.. HORACE: atomic clock with cooled atoms in a cell [C]. Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European, 1999, 1: 81-84.

[10] A M Steane, M Chowdhury, C J Foot. Radiation force in the magneto-optical trap [J]. J Opt Soc Am B, 1992, 9(12): 2142-2158.

孟艳玲, 郑本昌, 刘鹏, 万金银, 肖玲, 王秀梅, 高源慈, 成华东, 刘亮. 微波腔镀银实现漫反射冷却的实验研究[J]. 光学学报, 2014, 34(9): 0902001. Meng Yanling, Zheng Benchang, Liu Peng, Wan Jinyin, Xiao Ling, Wang Xiumei, Gao Yuanci, Cheng Huadong, Liu Liang. Experiment Studies on the Diffuse Light Cooling by Using Silver Plated Microwave Cavity[J]. Acta Optica Sinica, 2014, 34(9): 0902001.

微波腔镀银实现漫反射冷却的实验研究

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