用液芯光纤研究stokes/anti-stokes拉曼强度比测温  

Study on temperature measurement by stokes/anti-stokes Raman intensity rations using liquid-core optical tiber

作　　者：黄保坤[1] 高淑琴[1] 里佐威[1] 陈建[1] 陆国会[1] 

机构地区：[1]吉林大学物理学院,吉林长春130023

出　　处：《光学技术》2004年第4期446-448,共3页Optical Technique

基　　金：国家自然科学基金资助项目(10274023)

摘　　要：液芯光纤可以使拉曼光谱强度提高103倍。研究了在stokes/anti stokes拉曼光谱强度比测温中如何获得理想测温结果的方法。用长为5.20m、内径为50μm的含C6H6和CCl4混合液体的液芯光纤,获得了高强度CCl4的±218cm-1,±314cm-1和±459cm-1的拉曼光谱。利用各光谱带的stokes与anti stokes的强度比(Is/Ia),确定了液芯光纤所在处的温度。实验结果表明,±459cm-1的强度比的实验值与理论值符合得很好,±218cm-1为较好,±314cm-1稍差一些。从理论和实验两方面总结了拉曼频移、光纤损耗、溶剂效应、仪器响应等对测温结果的影响。Liquid-core optical fiber can enhance Raman spectral intensity 10~3 times. By using liquid-core optical fiber, how to acquire exact temperature is found by the relation of the temperature to the stokes and anti-stokes Raman intensity ration (I_s/I_a) with the liquid -core optical fiber,which length is 5.20m, inside diameter is 50μm, the core liquid is the solution of C_6H_6 and CCl_4, high intensity Raman spectra of CCl_4, which frequency shift is ±218cm^(-1), ±314cm^(-1), ±459cm^(-1). From (I_s/I_a) is acquired, the local temperature of the liquid core optical fiber can be decided. The result of the experiment shows that the theory value and experiment result is consistent. The best is ±459cm^(-1), the better is ±218cm^(-1), and the ±314cm^(-1) is not good as the others. The influence of Raman frequency shift, optical fiber loss, solvent effect etc are analyzed.

关 键 词：液芯光纤 拉曼光谱 stokes/anti-stokes拉曼光谱强度比 

分 类 号：TN818[电子电信—信息与通信工程] TK113[动力工程及工程热物理—热能工程]