title: Spin-polarized dark state free CPT state preparation with co-propagating left and right circularly polarized lasers.
abstract: 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.
authors.affiliation: School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Suping
authors.initials: S
authors.lastname: Qu
authors.forename: Sihong
authors.initials: S
authors.lastname: Gu
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D012031:Refractometry / Q000295:instrumentation*; D013113:Spin Labels; D013995:Time
chemical_list: D013113:Spin Labels