物理学报
物理學報
물이학보
2013年
8期
084218-1-084218-6
,共1页
杨珅%荣强周%孙浩%张菁%梁磊%徐琴芳%詹苏昌%杜彦英%冯定一%乔学光%忽满利?
楊珅%榮彊週%孫浩%張菁%樑磊%徐琴芳%詹囌昌%杜彥英%馮定一%喬學光%忽滿利?
양신%영강주%손호%장정%량뢰%서금방%첨소창%두언영%풍정일%교학광%홀만리?
光纤传感%温度测量%Michelson干涉
光纖傳感%溫度測量%Michelson榦涉
광섬전감%온도측량%Michelson간섭
fiber sensor%temperature measurement%Michelson interferometer
提出了一种简单的高灵敏度的光纤高温探针传感器,该传感器由一小段多模光纤和一端镀有银膜的单模光纤熔接而成.由于单模光纤和多模光纤的纤芯直径不同,当光波从多模光纤传输至多模光纤和单模光纤的熔接端面时,一部分纤芯光耦合进包层,因为单模光纤纤芯的折射率和包层的折射率不同,不同模式的光经过银膜反射后在多模光纤内重新耦合进单模光纤,最终形成干涉.随着外界温度的升高,干涉谱峰值会向长波方向漂移.实验结果证明这种传感器在470?C—600?C范围内具有很好的稳定性,线性度达99.7%,灵敏度为120 pm/?C,可作为远距离反射型探针温度传感器,在石油探测和油气田开发等领域有着广泛的应用前景.
提齣瞭一種簡單的高靈敏度的光纖高溫探針傳感器,該傳感器由一小段多模光纖和一耑鍍有銀膜的單模光纖鎔接而成.由于單模光纖和多模光纖的纖芯直徑不同,噹光波從多模光纖傳輸至多模光纖和單模光纖的鎔接耑麵時,一部分纖芯光耦閤進包層,因為單模光纖纖芯的摺射率和包層的摺射率不同,不同模式的光經過銀膜反射後在多模光纖內重新耦閤進單模光纖,最終形成榦涉.隨著外界溫度的升高,榦涉譜峰值會嚮長波方嚮漂移.實驗結果證明這種傳感器在470?C—600?C範圍內具有很好的穩定性,線性度達99.7%,靈敏度為120 pm/?C,可作為遠距離反射型探針溫度傳感器,在石油探測和油氣田開髮等領域有著廣汎的應用前景.
제출료일충간단적고령민도적광섬고온탐침전감기,해전감기유일소단다모광섬화일단도유은막적단모광섬용접이성.유우단모광섬화다모광섬적섬심직경불동,당광파종다모광섬전수지다모광섬화단모광섬적용접단면시,일부분섬심광우합진포층,인위단모광섬섬심적절사솔화포층적절사솔불동,불동모식적광경과은막반사후재다모광섬내중신우합진단모광섬,최종형성간섭.수착외계온도적승고,간섭보봉치회향장파방향표이.실험결과증명저충전감기재470?C—600?C범위내구유흔호적은정성,선성도체99.7%,령민도위120 pm/?C,가작위원거리반사형탐침온도전감기,재석유탐측화유기전개발등영역유착엄범적응용전경.
@@@@We propose a high sensitivity fiber optical temperature sensor with simple structure. The sensor is composed of a multimode fiber (MMF) and a short single mode fiber (SMF) whose end is coated with silver film as a reflective mirror. Due to the mismatch between the MMF core and the SMF core, part of guided mode is coupled with the cladding modes of downstream SMF cladding. The mode index difference between the fiber core and cladding is attributed to the phase difference, resulting in interference. When ambient temperature increases, the interference spectrum presents red-drift because of the difference in thermo-dependence. A high temperature sensitivity of 120 pm/?C is achieved, and the linearity is 99.5%. The configuration is simple and has a compact size, making it a good candidate for distant temperature sensing and oil prospecting.