中国物理B ›› 2000, Vol. 9 ›› Issue (8): 606-610.doi: 10.1088/1009-1963/9/8/010

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

NONLINEAR EFFECTS OF THIRD-AND FIFTH-ORDER ON POLARIZATION BEATS IN A FOUR-LEVEL SYSTEM

张彦鹏1, 卢克清1, 吴洪才1, 徐蛟1, 傅盘铭2   

  1. (1)Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China; (2)Institute of Physics Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2000-02-15 出版日期:2005-06-10 发布日期:2005-06-10
  • 基金资助:
    Project supported by the National Natural Science Foundation of China(Grant No. 69978019).

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   

  1. 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
  • Received:2000-02-15 Online:2005-06-10 Published:2005-06-10
  • Supported by:
    Project supported by the National Natural Science Foundation of China(Grant No. 69978019).

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摘要： 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.

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.

Key words: nonlinear effect, polarization beat, wave-mixing

中图分类号:  (Stochastic processes)

  • 02.50.Ey
42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.65.Hw (Phase conjugation; photorefractive and Kerr effects)