本文選題：光子晶體光纖　切入點(diǎn)：石墨烯涂層　出處：《重慶理工大學(xué)》2017年碩士論文

【摘要】：傳感器技術(shù)是現(xiàn)代信息技術(shù)和發(fā)展高新技術(shù)的重要支柱,具有廣泛的應(yīng)用。其中,氣敏傳感技術(shù)可以在硫化氫、一氧化碳、二氧化碳、氨氣、二氧化硫以及氮氧化合物等多種有毒有害氣體檢測方面發(fā)揮重要作用。隨著社會的發(fā)展,制造出能準(zhǔn)確檢測到大氣中有毒有害、易燃易爆氣體、性能優(yōu)異的氣體傳感器十分必要。近年來,關(guān)于光子晶體光纖傳感器的研究尤為廣泛,光子晶體光纖也稱為微結(jié)構(gòu)光纖和多孔光纖,由于它獨(dú)特的結(jié)構(gòu)特點(diǎn)和新穎的光學(xué)特性,使得它在光通信、光器件和光傳感等各大領(lǐng)域中獲得了極為廣泛的應(yīng)用,特別是在光纖傳感領(lǐng)域應(yīng)用最為突出。石墨烯(Graphene)是一種類似蜂巢狀的結(jié)構(gòu),而這種結(jié)構(gòu)是由六個(gè)碳原子組成的六元環(huán),它一層的厚度約為0.334nm。本文在實(shí)驗(yàn)中將光子晶體光纖與新興石墨烯材料結(jié)合,制備了基于石墨烯涂層光子晶體光纖氣體傳感器。本文主要研究工作如下:(1)使用古河S178A光纖熔接機(jī),研究了光子晶體光纖與普通單模光纖的熔接參數(shù)和熔接損耗,并實(shí)現(xiàn)了單模光纖與光子晶體光纖的熔接,熔接損耗低至0.03dB,成功制備了錐形光纖的微結(jié)構(gòu)。(2)基于還原氧化石墨烯與所制備的光纖,制成石墨烯涂層的光子晶體光纖作為傳感器敏感元件,涂層厚度為80nm,主要包括高溫煅燒還原氧化石墨烯,光纖的固定,石墨烯涂層的成膜方法。(3)自行簡易設(shè)計(jì)了基于石墨烯涂層光子晶體光纖氣敏元件的測試氣室,并結(jié)合光學(xué)平臺、計(jì)算機(jī)、ASE寬帶光源和AQ6370D光譜分析儀等設(shè)備成功搭建了氣敏測試平臺。(4)制備了不同濃度的硫化氫氣體,將所制備的不同濃度硫化氫氣體通入設(shè)計(jì)的氣室中,進(jìn)行敏感性能的測試,根據(jù)測試數(shù)據(jù)分析了石墨烯納米涂層光子晶體光纖的氣體敏感性能,測試結(jié)果顯示其靈敏度為31.43pm/ppm。(5)采用石墨烯和Cu納米粒子混合煅燒的方法,成功在石墨烯涂層光子晶體光纖基礎(chǔ)之上沉積Cu納米顆粒,與未沉積的石墨烯涂層進(jìn)行對比,觀察其光譜特性和氣敏性能,靈敏度為42.03pm/ppm。(6)結(jié)合光纖傳感原理與氣敏薄膜結(jié)構(gòu),通過對已測試數(shù)據(jù)分析和結(jié)合相關(guān)理論知識,分析光譜變化過程和傳感機(jī)理。
[Abstract]:Sensor technology is an important pillar of modern information technology and the development of high-tech, with a wide range of applications.Among them, gas sensing technology can play an important role in the detection of hydrogen sulfide, carbon monoxide, carbon dioxide, ammonia, sulfur dioxide and nitrogen oxides and other toxic and harmful gases.With the development of society, it is necessary to produce gas sensors that can accurately detect toxic, harmful, flammable and explosive gases in the atmosphere.In recent years, the research of photonic crystal fiber sensor is especially extensive. Photonic crystal fiber is also called micro-structure fiber and porous fiber. Because of its unique structure and novel optical properties, it is used in optical communication.Optical devices and optical sensors have been widely used in various fields, especially in the field of optical fiber sensing.Graphene (Graphene) is a honeycomb-like structure consisting of six carbon atoms in a six-member ring with a thickness of about 0.334nm.In this paper, photonic crystal fiber gas sensor based on graphene coating has been fabricated by combining photonic crystal fiber with new graphene material.The main work of this paper is as follows: (1) using the Gouhe S178A optical fiber welding machine, the welding parameters and welding loss between photonic crystal fiber and ordinary single-mode fiber are studied, and the fusion between single-mode fiber and photonic crystal fiber is realized.The microstructure of tapered fiber was fabricated successfully. Based on the reduced graphene oxide and the prepared fiber, the photonic crystal fiber coated with graphene was made as the sensor sensitive element.The thickness of the coating is 80 nm, which mainly includes high temperature calcination, reduction of graphene oxide, fixation of optical fiber, film forming method of graphene coating. The test gas chamber based on graphene coated photonic crystal fiber gas sensor is designed by ourselves and combined with optical platform.The wide band light source of ASE and AQ6370D spectrum analyzer were used to build a gas sensing test platform. (4) different concentrations of hydrogen sulfide gas were prepared, and the different concentrations of hydrogen sulfide gas were put into the designed gas chamber to test the sensitivity of the gas.The gas sensitivity of graphene nanocrystalline coated photonic crystal fiber is analyzed according to the test data. The test results show that the sensitivity is 31.43pm / ppm.f.) the method of mixed calcination of graphene and Cu nanoparticles is used.The Cu nanoparticles were successfully deposited on the graphene coated photonic crystal fiber and compared with the undeposited graphene coating. The spectral characteristics and gas sensing properties were observed. The sensitivity was 42.03pm / ppm.f6) combined with the sensing principle of optical fiber and the structure of gas sensing film.The spectral variation process and sensing mechanism are analyzed by analyzing the tested data and combining relevant theoretical knowledge.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN253;TP212

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