中国物理B ›› 1998, Vol. 7 ›› Issue (6): 414-421.doi: 10.1088/1004-423X/7/6/002

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LASER COOLING IN PHASE FLUCTUATING LASER FIELD

李义民, 杨东海, 王义遒   

  1. Department of Electronics, Peking University, Beijing 100871, China
  • 收稿日期:1997-10-09 出版日期:1998-06-20 发布日期:1998-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China .

LASER COOLING IN PHASE FLUCTUATING LASER FIELD

LI YI-MIN (李义民), YANG DONG-HAI (杨东海), WANG YI-QIU (王义遒)   

  1. Department of Electronics, Peking University, Beijing 100871, China
  • Received:1997-10-09 Online:1998-06-20 Published:1998-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China .

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摘要： The influence of laser linewidth Γ1 on laser cooling of atoms was investigated theoretically by using a diffusing phase model. The final tempe rature which can be achieved by Doppler cooling or sub Doppler cooling in phase fluctuating laser field is presented. It was found that the natural linewidth Γn of the transition used for cooling the atoms is an important quan tity in evaluating the influence of Γ1 under Doppler cooling mechanis m, and the laser linewidth has little effect on the final temperature under sub-Doppler cooling mechanism because the laser detuning is very large in this case.

Abstract: The influence of laser linewidth $\varGamma$1 on laser cooling of atoms was investigated theoretically by using a diffusing phase model. The final tempe rature which can be achieved by Doppler cooling or sub Doppler cooling in phase fluctuating laser field is presented. It was found that the natural linewidth $\varGamma$n of the transition used for cooling the atoms is an important quan tity in evaluating the influence of $\varGamma$1 under Doppler cooling mechanism, and the laser linewidth has little effect on the final temperature under sub-Doppler cooling mechanism because the laser detuning is very large in this case.

中图分类号:  (Atom cooling methods)

  • 37.10.De
32.80.Xx (Level crossing and optical pumping) 31.15.-p (Calculations and mathematical techniques in atomic and molecular physics)