Two Kinds of Cavity Geometry for Enhanced Laser Cooling of Solids
JIA You-Hua1,2, ZHONG Biao2, YIN Jian-Ping2
1Science College, Shanghai Second Polytechnic University, Shanghai 201209 2State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062
Two Kinds of Cavity Geometry for Enhanced Laser Cooling of Solids
JIA You-Hua1,2, ZHONG Biao2, YIN Jian-Ping2
1Science College, Shanghai Second Polytechnic University, Shanghai 201209 2State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062
We present a comparison between intracavity cooling and external cavity cooling for optical refrigeration. The results show that the intracavity scheme is preferred at low optical densities (<0.008), while the external cavity scheme is preferred at higher optical densities (>0.01). We can choose the proper scheme for different cases in experiments. Moreover, under the same conditions, taking Yb3+-doped ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF) film as an example, the cooling processes of the two scheme are obtained. The calculated results show that intracavity cooling will achieve a larger temperature drop for a thin film sample. Finally, the diode laser may become a candidate for the intracavity model briefly discussed.
We present a comparison between intracavity cooling and external cavity cooling for optical refrigeration. The results show that the intracavity scheme is preferred at low optical densities (<0.008), while the external cavity scheme is preferred at higher optical densities (>0.01). We can choose the proper scheme for different cases in experiments. Moreover, under the same conditions, taking Yb3+-doped ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF) film as an example, the cooling processes of the two scheme are obtained. The calculated results show that intracavity cooling will achieve a larger temperature drop for a thin film sample. Finally, the diode laser may become a candidate for the intracavity model briefly discussed.
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2010, Vol. 27 
