Fan Shi 1,2,3Yongshun Cui 1,2,3Zhenwei Zhang 1,2,3Huan Zhao 1,2,3[ ... ]Keming Feng 1,2,3
Author Affiliations
Abstract
1 Beijing Institute of Radio Metrology &
2 Measurement, Beijing 100039, China
3 Science and Technology on Metrology and Calibration Laboratory, Beijing 100039, China
We present the mechanism of coherent population trapping (CPT) atom clock. The optical system is designed for a portable CPT atom clock. In this system, single transverse mode vertical-cavity surface-emitting laser is used as a miniature pump laser. The driven circuit is designed based on a field-programmable gate array full digital control system and special-purpose chip MAX1968. The experimental results show that the optical system can provide circularly polarized light, and has small volume and low power consumption. These indi-cate that the optical system is a promising candidate for a portable CPT atom clock engineering prototype.
220.4830 Systems design 230.2090 Electro-optical devices Chinese Optics Letters
2014, 12(s2): S22205