發(fā)布時(shí)間：2018-05-27 17:19

  本文選題：光纖傳感器 + 馬赫曾德爾干涉�。� 參考：《北京交通大學(xué)》2017年博士論文

【摘要】：伴隨著光纖制作以及相關(guān)技術(shù)的進(jìn)步,光纖傳感器憑借自身優(yōu)點(diǎn),受到越來越多研究者的關(guān)注。在安全保障、交通運(yùn)輸、工程施工、管線監(jiān)測等領(lǐng)域都有著廣泛的應(yīng)用。本文設(shè)計(jì)制作了不同的光纖干涉結(jié)構(gòu),并結(jié)合光纖光柵,分別搭建了可以對(duì)溫度、折射率、振動(dòng)、氣壓以及位置信息傳感的特殊光纖結(jié)構(gòu)傳感器。具體工作包括以下幾個(gè)方面:1.提出了無芯-單模-無芯的模式干涉結(jié)構(gòu),對(duì)該結(jié)構(gòu)的透射譜特性進(jìn)行了仿真。將該模式干涉結(jié)構(gòu)與光柵相結(jié)合,制作了溫度和折射率同時(shí)測量的傳感器。模式干涉峰和光柵反射峰的溫度靈敏度分別為0.07189nm/℃C和0.01654nm/℃C,其折射率靈敏度分別為-111.464nm/RIU和Onm/RIU。利用光柵和干涉結(jié)構(gòu)制作了振動(dòng)傳感器,分析了不同結(jié)構(gòu)的傳感器性能。將該傳感器應(yīng)用到列車監(jiān)控系統(tǒng)中,實(shí)驗(yàn)對(duì)列車行車狀態(tài)進(jìn)行了測量。2.利用光柵的應(yīng)力敏感性,設(shè)計(jì)了一種基于二維光柵陣列的位置傳感結(jié)構(gòu)。實(shí)驗(yàn)中對(duì)各個(gè)光柵的中心波長進(jìn)行了設(shè)計(jì),并批量制作了所需光柵,用制成的傳感器實(shí)現(xiàn)了二維位置傳感,并以此為基礎(chǔ)設(shè)計(jì)制作了十二個(gè)鍵位的全光纖鍵盤。3.提出了基于微加工的管狀光纖和光纖光柵的復(fù)合結(jié)構(gòu)傳感器,實(shí)現(xiàn)了對(duì)溫度和氣壓的同時(shí)測量。對(duì)該結(jié)構(gòu)氣壓傳感靈敏度進(jìn)行了仿真,結(jié)果顯示該結(jié)構(gòu)的氣壓靈敏度約為2.78nm/MPa。實(shí)驗(yàn)制作所設(shè)計(jì)的溫度和氣壓傳感器,實(shí)現(xiàn)了對(duì)溫度和氣壓的同時(shí)測量。測量結(jié)果顯示傳感器的氣壓靈敏度為3.9969 nm/MPa,溫度靈敏度為8.7pm/℃C。4.提出了一種基于管狀光纖和折射率匹配液的高靈敏度溫度或氣壓傳感結(jié)構(gòu),并對(duì)其進(jìn)行了仿真。結(jié)果顯示,傳感結(jié)構(gòu)溫度靈敏度約為5.4nm/℃C,氣壓靈敏度約為-0.0152nm/Pa,自由光譜范圍變化的靈敏度約為60.47nm/MPa。實(shí)驗(yàn)制作了基于管狀光纖和折射率匹配液的傳感器,并對(duì)小范圍內(nèi)溫度和氣壓變化進(jìn)行了測量,測得的溫度靈敏度約為6.96nm/℃C。用該傳感器對(duì)大范圍氣壓變化的干涉譜進(jìn)行了測量,測得自由光譜變化靈敏度約為59.9nm/MPa。
[Abstract]:With the progress of optical fiber fabrication and related technology, optical fiber sensors have attracted more and more attention by virtue of their own advantages. In safety, transportation, engineering construction, pipeline monitoring and other fields have a wide range of applications. In this paper, we have designed and fabricated different fiber optic interference structures, and combined with fiber grating, we have constructed a special optical fiber structure sensor which can sensing temperature, refractive index, vibration, air pressure and position information. Specific work includes the following aspects: 1. A coreless-single-core-coreless mode interference structure is proposed and the transmission spectrum characteristics of the structure are simulated. A sensor for simultaneous measurement of temperature and refractive index is fabricated by combining the mode interference structure with the grating. The temperature sensitivity of the mode interference peak and the grating reflection peak is 0.07189nm/ 鈩，

本文編號(hào)：1943103