光子学报
光子學報
광자학보
ACTA PHOTONICA SINICA
2002年
1期
55-59
,共5页
非线性效应%极化拍频%四、六波混频%级联三能级系统
非線性效應%極化拍頻%四、六波混頻%級聯三能級繫統
비선성효응%겁화박빈%사、륙파혼빈%급련삼능급계통
Nonlinear effects%Polarization beat%Wave-mixing%Cascade three-level system
本文采用二阶相干函数理论研究了级联三能级系统中三阶及五阶极化拍频(TPBCTS及FPBCTS)的非线性效应.通过对泵浦光为宽带及窄带情形的分析,我们发现三阶及五阶极化拍频信号的强度在时域内的变化取决于激光的统计特性和跃迁的横向驰豫率,从而在测量原子能级分裂时可以得到消除多普勒极限增宽的精度.另外,我们对信号的空间调制也进行了分析.
本文採用二階相榦函數理論研究瞭級聯三能級繫統中三階及五階極化拍頻(TPBCTS及FPBCTS)的非線性效應.通過對泵浦光為寬帶及窄帶情形的分析,我們髮現三階及五階極化拍頻信號的彊度在時域內的變化取決于激光的統計特性和躍遷的橫嚮馳豫率,從而在測量原子能級分裂時可以得到消除多普勒極限增寬的精度.另外,我們對信號的空間調製也進行瞭分析.
본문채용이계상간함수이론연구료급련삼능급계통중삼계급오계겁화박빈(TPBCTS급FPBCTS)적비선성효응.통과대빙포광위관대급착대정형적분석,아문발현삼계급오계겁화박빈신호적강도재시역내적변화취결우격광적통계특성화약천적횡향치예솔,종이재측량원자능급분렬시가이득도소제다보륵겁한증관적정도.령외,아문대신호적공간조제야진행료분석.
Based on the second-order coherence function theory,authors have studied nonlinear effects of third-and fifth-order on polarization beats in a cascade three-level system (TPBCTS and FPBCTS).It can be seen that the different temporal behavior of the beating signal in TPBCTS and FPBCTS depends on the stochastic properties of the lasers and transverse relaxation rate of the transition.The cases that pump beams have either narrowband or broadband line width are considered and it has been found that for both cases an eliminating Doppler broadened free precision can be obtained in measuring energy-level difference.The spatially modulation behavior of the beat signal has also been shown.
