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我室论文在Review of Scientific Instruments上发表
 更新时间:2015年09月30 【字体: 】 

 Jiang, Jun and Ma, Guo-ming and Song, Hong-tu and Zhou, Hong-yang and Li, Cheng-rong and Luo, Ying-ting and Wang, Hong-bin. Dissolved hydrogen detection in power transformer oil based on chemically etched fiber Bragg grating,  Review of Scientific Instruments, 86, 106103 (2015), DOI:http://dx.doi.org/10.1063/1.4932675A

fiber Bragg grating (FBG) sensor based on chemically etched cladding to detect dissolved hydrogen is proposed and studied in this paper. Low hydrogen concentration tests have been carried out in mixed gases and transformer oil to investigate the repeatability and sensitivity. Moreover, to estimate the influence of etched cladding thickness, a physical model of FBG-based hydrogen sensor is analyzed. Experimental results prove that thin cladding chemically etched by HF acid solution improves the response to hydrogen detection in oil effectively. At last, the sensitivity of FBG sensor chemically etched 16 μm could be as high as 0.060 pm/(μl/l), increased by more than 30% in comparison to un-etched FBG.

 

 

 

 

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