[1] [1] J. Vanier. Atomic clocks based on coherent population trapping: a Review[J]. Appl. Phys. B, 2005, 81: 421～442

[2] [2] J. Vanier, A. Godone, F. Levi et al.. Atomic clocks based on coherent population trapping: basic theoretical models and frequency stability[C]. Proceedings of the 2003 IEEE International Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003: 2～15

[3] [3] Fan Qi, Guo Wenge, Zhang Shougang et al.. Atomic frequency standard using coherent population trapping[J]. Journal of Time and Frequeney, 2006, 29(2): 107～115

[4] [4] Hao Yongqin, Liu Wenli, Zhong Jingchang et al.. A new process in fabrication of vertical-cavity surface emitting laser[J]. Chinese J . Lasers, 2006, 33(4): 443～446

[5] [5] Zhao Lumin, Wang Qing, Yan Changling et al.. 980 nm high power vertical cavity surface emitting laser[J]. Chinese J .Lasers, 2004, 31(2): 142～144

[6] [6] Liu Lei, Zhao Zhimin, Zhang Cunshan et al.. Research on characteristic testing system of VCSEL and its application[J]. Applied Laser, 2007, 27(5): 390～392

[7] [7] Yang Yi, Ruan Yu, Li Zhengjia et al.. Rate-equation-based VCSEL thermal model and simulation[J] . Chinese J. Lasers, 2003, 30(3) :194～198

[8] [8] J. Kitching, S. Knappe, Li-Anne Liew et al.. Chip-scale atomic frequency references [C] . ION GNSS 18th International Technical Meeting of the Satellite Division, 2005. 1662～1669

[9] [9] Li Qiang, Yun Enxue, Gu Sihong. Study of coherent population trapping state with a four-level system[J]. Chinese J. Lasers, 2009, 36(2): 351～355

[10] [10] Du Runchang, Liu Guobing, Chen Jiehua et al.. Realization and investigation of relative experimental parameter of coherent population trapping frequency standard[J]. Spectroscopy and Spectral Analysis, 2008, 28(8): 1697～1700

[11] [11] Liu Guobin, Du Runchang, Liu Chaoyang et al.. CPT magnetometer with atomic energy level modulation[J].Chin. Phys. Lett., 2008, 25(2): 472～474

[12] [12] Cao Yuanhong, Zhang Xianyi, Kang Songbai et al.. A digital servo system for rubidium frequency standards[J]. Chinese Journal of Magnetic Resonance, 2007, 24(4): 494～500

[13] [13] Wang Yidao, Wang Qinji, Fu Jishi et al.. Principle of Quantum Frequency Standards[M] . Beijing : Science Press, 1986. 160～165, 235～245

[14] [14] http://www.kernco.com/pdfs/CPT-C01DataSheet060704D.pdf

[15] [15] http://www.gpstime.com.cn/downloads/SA.31m%20SA.33M.pdf