A temperature measurement device can produce data deviations and can even be damaged in a high-dose radiation environment.To reduce the radiation damage to such a device and improve the temperature measurement accuracy in a radiation environment,a temperature sensor based on optical-fiber sensing technology is proposed.This sensor has a cascade structure composed of a single-mode fiber(SMF),a dispersion-compensation fiber(DCF),a no-core fiber(NCF),and another SMF(SDNS).The DCF and NCF are coated with a polydimethylsiloxane(PDMS)film,which is a heat-sensitive material with high thermal optical and thermal expansion coefficients.In experiments,PDMS was found to produce an irradiation crosslinking effect after irradiation,which improved the temperature sensitivity of the SDNS sensor.The experimental results showed that within a range of 30-100℃,the maximum temperature sensitivity after irradiation was 62.86 pm/℃,and the maximum transmission sensitivity after irradiation was 3.353×10-2 dB/℃,which were 1.22 times and 2.267 times the values before irradiation,respectively.In addition,repeated temperature experiments verified that the SDNS sensor coated with the PDMS film had excellent temperature repeatability.Furthermore,it was found that with an increase in the irradiation intensity,the irradiation crosslinking degree of PDMS increased,and the tempera-ture sensitivity of the sensor was improved.The proposed sensor could potentially be applied to temperature mea-surement in a nuclear-radiation environment.

Fang Wang;Qiu-Feng Wu;Yu-Rong Jiang;Chan Jin;Xiao-Hui Wang;Ben-Shang Zhang;Chun-Wang Ma

College of Electronic and Electrical Engineering,Henan Normal University,Xinxiang 453007,China;Key Laboratory of Optoelectronic Sensing Integrated Application of Henan Province,Xinxiang 453007,China;School of Physics,Henan Normal University,Xinxiang 453007,China;Engineering Laboratory of Intelligent Additive Manufacturing of Henan Province,Xinxiang 453007,China;Key Laboratory of Interfacial Physics Technology Project,Chinese Academy of Sciences,Shanghai 201800,China;Institute of Isotope Research,Henan Academy of Sciences,Zhengzhou 450000,China

核技术（英文版）

[1]Fang Wang;Qiu-Feng Wu;Yu-Rong Jiang;Chan Jin;Xiao-Hui Wang;Ben-Shang Zhang;Chun-Wang Ma-.Effect of irradiation on temperature performance of dispersion-compensation no-core cascade optical-fiber sensor coated with polydimethylsiloxane film)[J].核技术（英文版）,2022(09):10-20

Effect,irradiation,temperature,performance,dispersion,compensation,core,cascade,optical,fiber,sensor,coated,polydimethylsiloxane,film,measurement,device,can,produce,data,deviations,even,damaged,high,dose,environment,To,reduce,such,accuracy,sensing,technology,proposed,This,has,structure,composed,single,mode,SMF,DCF,NCF,another,SDNS,are,PDMS,which,heat,sensitive,material,thermal,expansion,coefficients,In,experiments,was,found,crosslinking,effect,after,improved,sensitivity,experimental,results,showed,that,within,range,maximum,pm,transmission,dB,were,times,values,before,respectively,addition,repeated,verified,had,excellent,repeatability,Furthermore,intensity,degree,increased,could,potentially,applied,nuclear

0.430855