NONLINEAR EFFECTS OF THIRD-AND FIFTH-ORDER ON POLARIZATION BEATS IN A FOUR-LEVEL SYSTEM
Zhang Yan-peng (张彦鹏)a, Lu Ke-qing (卢克清)a, Wu Hong-cai (吴洪才)a, Xu Jiao (徐蛟)a, Fu Pan-ming (傅盘铭)b
a Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China; b Institute of Physics Chinese Academy of Sciences, Beijing 100080, China
Abstract We have employed second-order coherence function theory to study the nonlinear effects of third-and fifth-order on polarization beats in a four-level system (TPBFS and FPBFS). It is found that the different temporal behavior of the beat signal in TPBFS and FPBFS depends on the stochastic properties of the lasers and transverse relaxation rate of the transition. We have considered the cases that pump beams have either narrow band or broadband linewidth and found that for both cases a Doppler-free precision can be achieved in the measurement of the energy-level difference between two excited states which are dipolar forbidden from the ground state. We also discussed the spatiall modulation behavior of the beat signal.
Received: 15 February 2000
Accepted manuscript online:
(Phase conjugation; photorefractive and Kerr effects)
Fund: Project supported by the National Natural Science Foundation of China(Grant No. 69978019).
Cite this article:
Zhang Yan-peng (张彦鹏), Lu Ke-qing (卢克清), Wu Hong-cai (吴洪才), Xu Jiao (徐蛟), Fu Pan-ming (傅盘铭) NONLINEAR EFFECTS OF THIRD-AND FIFTH-ORDER ON POLARIZATION BEATS IN A FOUR-LEVEL SYSTEM 2000 Chinese Physics 9 606
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