【摘要】：作為新型傳感檢測(cè)技術(shù),光纖傳感技術(shù)已經(jīng)成為傳感器研究領(lǐng)域的關(guān)鍵技術(shù)之一。微納光纖的倏逝波傳輸特性使其在傳感探測(cè)時(shí)體現(xiàn)出高靈敏度、極短響應(yīng)時(shí)間等特點(diǎn),因此在光學(xué)傳感器應(yīng)用方面有著廣闊的應(yīng)用前景。與此同時(shí),石墨烯及其衍生物氧化石墨烯(graphene oxide,GO)也已經(jīng)成為生物和化學(xué)等傳感研究領(lǐng)域關(guān)注的新型敏感材料。本論文圍繞氧化石墨烯的光纖氣體傳感器的研究,主要工作內(nèi)容如下:提出將氧化石墨烯薄膜涂覆在微納光纖表面,形成混合波導(dǎo)結(jié)構(gòu)。詳細(xì)探討了在該復(fù)合波導(dǎo)結(jié)構(gòu)中傳輸光信號(hào)的模場(chǎng)分布情況以及深入研究了這種氧化石墨烯-微納光纖混合波導(dǎo)結(jié)構(gòu)的傳輸特性,并將該復(fù)合波導(dǎo)結(jié)構(gòu)應(yīng)用于氣體傳感領(lǐng)域。本文首先詳細(xì)介紹了石墨烯和微納光纖的特性、傳輸原理以及制備方法,并探討了氧化石墨烯和微納光纖的結(jié)合方式以及具體步驟。然后,分析了這種混合波導(dǎo)結(jié)構(gòu)的傳感特性,針對(duì)氧化石墨烯在該混合波導(dǎo)中的作用進(jìn)行了探討,并利用仿真軟件仿真了該混合波導(dǎo)的模場(chǎng)分布。最后將這種復(fù)合波導(dǎo)結(jié)構(gòu)應(yīng)用于光纖傳感實(shí)驗(yàn)當(dāng)中,分別對(duì)氧化石墨烯-微納光纖混合波導(dǎo)進(jìn)行了溫度傳感特性實(shí)驗(yàn)以及氣體傳感特性實(shí)驗(yàn),結(jié)合實(shí)驗(yàn)結(jié)果證明氧化石墨烯-微納光纖復(fù)合波導(dǎo)傳感器結(jié)構(gòu)的有效性以及在傳感應(yīng)用中的優(yōu)勢(shì)。本文還提出一種基于氧化石墨烯涂覆微光纖環(huán)形諧振器(graphene oxide coated microfiber knot resonator,GMKR)的光纖氣體傳感器。其工作原理是當(dāng)氣體分子吸附到GO的表面時(shí),改變GO的折射率,然后可以通過(guò)測(cè)量GMKR的干涉條紋漂移來(lái)檢測(cè)氣體濃度變化引起的折射率變化。由于氣體分子和GO之間的吸附能力和電荷轉(zhuǎn)移能力不同,實(shí)驗(yàn)結(jié)果顯示該傳感結(jié)構(gòu)對(duì)NH_3和CO的檢測(cè)靈敏度分別為~0.34pm/ppm和~0.16pm/ppm。同時(shí),實(shí)驗(yàn)結(jié)果表明,GO是一種非常理想的氣敏傳感材料,并且其制備工藝簡(jiǎn)單,轉(zhuǎn)移成功率高,一致性好,因此可以很好地與各種光纖傳感結(jié)構(gòu)相結(jié)合,形成一類(lèi)新型的光纖氣體傳感器。
[Abstract]:As a new sensor detection technology, optical fiber sensing technology has become one of the key technologies in the field of sensor research. The evanescent wave propagation characteristics of micro-nano fiber make it have the characteristics of high sensitivity and very short response time in sensing detection, so it has a broad application prospect in optical sensor applications. At the same time, graphene oxide (graphene oxide,GO) and its derivatives have become a new sensitive material in biosensor research fields such as biology and chemistry. The main work of this thesis is as follows: a hybrid waveguide structure is proposed by coating graphene oxide film on the surface of micro-nano fiber. The mode field distribution of the optical signal transmitted in the composite waveguide structure is discussed in detail. The transmission characteristics of the hybrid waveguide structure with graphene oxide micro-nano fiber are studied in detail. The composite waveguide structure is applied to the field of gas sensing. In this paper, the characteristics, transmission principle and preparation method of graphene and micro-nano fiber are introduced in detail, and the combination mode and concrete steps of graphene oxide and micro-nano fiber are discussed. Then, the sensing characteristics of the hybrid waveguide structure are analyzed, and the role of graphene oxide in the hybrid waveguide is discussed, and the mode field distribution of the hybrid waveguide is simulated by simulation software. Finally, the composite waveguide structure is applied to fiber optic sensing experiments. The temperature sensing characteristics and gas sensing characteristics of graphene oxide / micro / nano fiber hybrid waveguides are studied. The experimental results show that the structure of graphene oxide / micro / nano fiber composite waveguide sensor is effective and has advantages in sensing applications. An optical fiber gas sensor based on graphene oxide coated microfiber ring resonator (graphene oxide coated microfiber knot resonator,GMKR) is also proposed. The principle is to change the refractive index of GO when the gas molecule is adsorbed on the surface, and then the refractive index change caused by the change of gas concentration can be detected by measuring the interference fringes drift of GMKR. Due to the difference of adsorption and charge transfer ability between gas molecules and GO, the experimental results show that the sensitivity of the sensing structure to NH_3 and CO is 0.34 ppm and 0.16 pm / ppm, respectively. At the same time, the experimental results show that go is a very ideal gas sensing material, and its preparation process is simple, the transfer success rate is high, and the consistency is good, so it can be well combined with various optical fiber sensing structures. A new type of optical fiber gas sensor is formed.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP212

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 程楊;石墨烯—微光纖混合波導(dǎo)偏振特性及其傳感應(yīng)用研究[D];電子科技大學(xué);2014年

2 任衛(wèi)紅;平頂模式微納光纖的模場(chǎng)及色散特性研究[D];湖南大學(xué);2010年

，

本文編號(hào)：2238470