Cryogenic Temperature Measurement Using Rayleigh Backscattering Spectra Shift by OFDR
Cryogenic Temperature Measurement Using Rayleigh Backscattering Spectra Shift by OFDR
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DOI：
10.1109/lpt.2014.2317702
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发表时间：
2014-06-01
影响因子：
2.6
通讯作者：
Feng, Bowen
中科院分区：
文献类型：
--
作者：
Du, Yang;Liu, Tiegen;Feng, Bowen
提出了一种在低温环境下实现温度变化测量的方法。例如，在一个实施例中，在76 K）使用瑞利后向散射光谱（RBS）的标准单模光纤中的光频域反射仪位移。通过分析光纤的有效传感段尺寸（或传感空间分辨率）、最小可测温度变化和RBS漂移的温度响应之间的关系，发现在低温环境下，增加有效传感段尺寸可以提高最小可测温度变化。我们的实验表明，在相对较高的温度（e。例如，在一个实施例中，高于195 K），最小可测量温度变化为0.21 K，有效传感段尺寸为8 cm。当温度很低时（E。例如，在一个实施例中，在76 K时），通过简单地将光纤的有效传感段尺寸增加到48 cm，最小可测温度变化仍然可以保持在0.34 K。
We present a method to realize temperature variation measurement in the cryogenic environment (e. g., at 76 K) using Rayleigh backscattering spectra (RBS) shift in standard single mode optical fiber by optical frequency-domain reflectometry. By analyzing the relationship of effective sensing segment size of fiber (or sensing spatial resolution), minimal measurable temperature variation, and temperature response of RBS shift, we found minimal measurable temperature variation in the cryogenic environment can be improved by increasing effective sensing segment size. Our experiments show that at a relatively high temperature (e. g., above 195 K), minimal measurable temperature variation is 0.21 K with an effective sensing segment size of 8 cm. When the temperature is very low (e. g., at 76 K), minimal measurable temperature variation can still maintain 0.34 K by simply increasing the effective sensing segment size of fiber to 48 cm.