【摘要】：針對大于500℃的高溫環(huán)境,提出了一種可用于高溫溫度測量的高溫光子晶體光纖(PCF)溫度傳感器。在光子晶體光纖末端熔接一段純石英無芯光纖構成外腔式光纖法珀腔(EFPI)結構。純石英無芯光纖在高溫下的熱膨脹和熱光效應使得EFPI的光學腔長發(fā)生變化。結合光纖白光干涉測量技術,通過測量EFPI的腔長得到被測溫度。在不同溫度環(huán)境下,對腔長為175μm的EFPI光纖溫度傳感器進行連續(xù)測量。測量結果顯示,設計的高溫光纖溫度傳感器在27~1100℃范圍內(nèi),腔長-溫度三階擬合精度達到99.95%,腔長-溫度靈敏度為(0.851+0.0023T-0.000000957T2)nm/℃,其中在1100℃時,溫度測量分辨率為0.225℃。
[Abstract]:A high temperature photonic crystal fiber (PCF) temperature sensor is proposed for high temperature measurement. A pure quartz coreless fiber is fused at the end of the photonic crystal fiber to form an external cavity Fabry-Perot cavity (EFPI) structure. The thermal expansion and thermo-optical effect of pure quartz coreless fiber at high temperature make the optical cavity length of EFPI change. The measured temperature is obtained by measuring the cavity length of EFPI in combination with optical fiber white light interferometry. The EFPI optical fiber temperature sensor with a cavity length of 175 渭 m was continuously measured under different temperature conditions. The measurement results show that the designed high-temperature optical fiber temperature sensor has a precision of 99.95 in the range of 271,100 鈩，

本文編號：2412424