四能级系统超快调制光谱学中光子回波的研究  

Photon Echo in Ultrafast Modulation Spectroscopy of a Four Level System

作　　者：张彦鹏[1] 李实[1] 孙立群[1] 

机构地区：[1]西安交通大学

出　　处：《西安交通大学学报》1999年第3期39-42,共4页Journal of Xi'an Jiaotong University

基　　金：电信学院科研基金

摘　　要：对四能级系统超快调制光谱学（ＵＭＳＦＳ）中的光子回波进行了研究．当泵浦光束为宽带线宽且相对时间延迟大于０时，双光子四波混频对应于和频三能级光子回波．泵浦光束为宽带线宽且相对时间延迟小于０时与泵浦光束为窄带时情形类似．这种技术在测量与基态是偶极禁戒跃迁的两激发态之间的能级分裂时，可得到消除多普勒增宽的测量精度．Photon echo in ultrafast modulation spectroscopy is studied for a four level system(UMSFS).When the pump beams have broadband linewidth, two photon four wave mixing(FWM)is related to sum frequency three level photon echo with relative time delay τ>0.The result coincides with the case when the beams have narrow linewidth, τ<0.This technique can achieve Doppler free precision in the measurement of the energy level splitting between two excited states which are dipolar forbidden from the ground state.

关 键 词：四波混频 光子回波 UMSFS 双光子光谱学 

分 类 号：TN201[电子电信—物理电子学] O433[机械工程—光学工程]