Zhang Yi, Qu Suping, Gu Sihong
School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
Opt Express. 2012 Mar 12;20(6):6400-5. doi: 10.1364/OE.20.006400.
We have developed and experimentally studied a coherent population trapping (CPT) state preparation scheme for atomic clock application with co-propagating left and right circularly polarized lasers. With realization of constructive interference and spin-polarized dark state free in CPT state preparation, we have obtained CPT resonance signal 3 times larger than that of the conventional scheme used in atomic clock. Polarization fluctuations and CPT signal sensitivity to laser power behaviors are both improved with the scheme. Our study reveals that it is a promising candidate for both normal-size and chip-scale CPT atomic clocks.
我们已经开发并通过实验研究了一种用于原子钟应用的相干布居囚禁（CPT）态制备方案，该方案使用同向传播的左旋和右旋圆偏振激光。通过在CPT态制备中实现相长干涉和无自旋极化暗态，我们获得了比原子钟中使用的传统方案大三倍的CPT共振信号。该方案同时改善了偏振波动和CPT信号对激光功率行为的灵敏度。我们的研究表明，它对于常规尺寸和芯片级CPT原子钟都是一个有前途的候选方案。
