本文選題：光纖傳感 + 側(cè)邊拋磨光纖�。� 參考：《暨南大學(xué)》2015年碩士論文

【摘要】：光纖傳感是光纖技術(shù)的一個重要領(lǐng)域,其發(fā)展始于20世紀(jì)70年代,一經(jīng)問世就受到極大重視,幾乎在各個領(lǐng)域都得到研究與應(yīng)用,成為傳感技術(shù)的先導(dǎo)。側(cè)邊拋磨光纖與微納光纖作為光纖傳感器的兩種基底也在光電傳感檢測方面得到了廣泛的應(yīng)用并且起著重要的作用。石墨烯是由單層碳原子構(gòu)成的二維蜂窩狀結(jié)構(gòu)晶體,碳原子排列與石墨的單原子層相同,是一種結(jié)合了半導(dǎo)體和金屬屬性的碳質(zhì)新材料。石墨烯的發(fā)現(xiàn)被預(yù)測很有可能在很多領(lǐng)域引起革命性變化。由于石墨烯結(jié)構(gòu)完整,化學(xué)穩(wěn)定性高,其表面呈惰性狀態(tài),與其它介質(zhì)的相互作用較弱,并且石墨烯的片與片之間有較強(qiáng)的范德華力,容易產(chǎn)生聚集,使其在水及常見的有機(jī)溶劑中難于分散,這給石墨烯的進(jìn)一步研究和應(yīng)用造成了困難。因此,本文研究的甲基藍(lán)石墨烯是采用將一種芳香族水溶性小分子甲基藍(lán)修飾到石墨烯分子上得到水性化石墨烯。單模光纖中,通常足夠厚度的光纖包層保證了在纖芯中傳播的光場以及在光纖包層中倏逝波場的能量不會泄漏到光纖外面。側(cè)邊拋磨光纖是用拋磨的方法使光纖的包層厚度減小到倏逝波場存在的區(qū)域,也就是距纖芯僅幾個微米的區(qū)域時,就形成了纖芯中傳輸光倏逝波場的“泄漏窗口”。在此“窗口”處,就存在了利用倏逝波場來激發(fā)、控制、探測光纖纖芯中的傳輸光波的可能。利用這一特性,已制作成為各類光纖器件和光纖傳感器。微納光纖是在火焰或其他加熱裝置的加熱下,對單根標(biāo)準(zhǔn)單模光纖去掉一截保護(hù)層的區(qū)域進(jìn)行加熱,待加熱段光纖達(dá)到軟化狀態(tài)時,通過對加熱區(qū)域兩端的光纖進(jìn)行拉伸使得光纖逐漸變細(xì)而得到。微納光纖已經(jīng)成為構(gòu)建新型微納光學(xué)系統(tǒng)的基礎(chǔ)。本論文研究基于石墨烯的側(cè)邊拋磨光纖和基于甲基藍(lán)石墨烯的微納光纖兩種器件的光可控特性,利用其沉積材料的特殊光學(xué)特性,對側(cè)邊拋磨光纖與微納光纖進(jìn)行了光可控特性研究與探索。利用石墨烯與甲基藍(lán)石墨烯的飽和吸收特性,用405nm的泵浦光來控制側(cè)邊拋磨光纖與微納光纖中信號光的功率變化。當(dāng)已知光纖中信號光的功率變化時,根據(jù)實驗得出的結(jié)論可以推導(dǎo)出泵浦光的功率,實現(xiàn)探測傳感405nm光功率。以自然蒸發(fā)沉積的方法將石墨烯沉積到側(cè)邊拋磨光纖的拋磨區(qū),用波長405nm的泵浦光照射沉積石墨烯的拋磨區(qū),測量光纖中的信號光功率變化。實驗結(jié)果表明覆蓋石墨烯的側(cè)邊拋磨光纖對405nm泵浦光的光可控有較高的靈敏度。在泵浦光變化范圍內(nèi),其透過光功率最大變化達(dá)3.4d B,證明了沉積石墨烯的側(cè)邊拋磨光纖具有良好的405nm光可控特性。實驗數(shù)據(jù)的分析表明沉積石墨烯的側(cè)邊拋磨光纖對泵浦光功率上升的光可控特性靈敏度為0.29d B/mw,線性度為97.1%;對泵浦光功率下降的光可控特性靈敏度為0.25d B/mw,線性度為96.5%。因此基于石墨烯的側(cè)邊拋磨光纖光可控特性研究具有良好的重復(fù)性。以自然蒸發(fā)沉積的方法將甲基藍(lán)石墨烯沉積到微納光纖的微納區(qū),用波長405nm的泵浦光照射沉積甲基藍(lán)石墨烯的微納區(qū),測量光纖中的信號光功率變化。實驗結(jié)果表明沉積甲基藍(lán)石墨烯的微納光纖傳輸光功率與405nm泵浦光的光功率呈線性關(guān)系;當(dāng)使用通信波長1550nm檢測時,線性相關(guān)系數(shù)可達(dá)98.1%,檢測紫光功率的靈敏度為0.22d B/mw。本論文創(chuàng)新之處:1.采用泵浦光外部照射的方法,研究了基于石墨烯的側(cè)邊拋磨光纖光控特性,并獲得了輸出功率與泵浦光功率呈良好的線性關(guān)系,基于石墨烯的側(cè)邊拋磨光纖對毫瓦量級的泵浦光有很好的線性響應(yīng)。2.采用泵浦光外部照射的方法研究了基于新型甲基藍(lán)石墨烯的微納光纖光控特性,獲得了泵浦光功率與輸出功率呈良好的線性關(guān)系,且響應(yīng)帶寬為100nm。
[Abstract]:Optical fiber sensing is an important field of optical fiber technology. Its development began in 1970s. It has been paid great attention in the world since its advent in 1970s. It has been studied and applied in almost all fields, and has become the precursor of sensing technology. The two substrates of side polishing fiber and micro nano fiber as optical fiber sensors have also been obtained in the photoelectric sensing detection. Graphene is a two-dimensional honeycomb structure composed of single carbon atoms. The arrangement of carbon atoms is the same as the single atomic layer of graphite. It is a new carbon material which combines the properties of semiconductors and metals. The discovery of graphene is likely to cause revolutionary changes in many fields. Graphene has a complete structure, high chemical stability, its surface is inert, and the interaction with other media is weak, and there is a strong Fan Dehua force between the tablet and the sheet of graphene. It is easy to produce aggregation, which makes it difficult to disperse in water and common organic solvents. This has caused difficulties in further research and application of calculus. In this paper, the methyl blue methylene is studied by modifying an aromatic water soluble small molecular methyl blue to the Shi Moxi molecule to get the aqueous fossil ink. In a single mode fiber, the optical fiber cladding that is usually thick enough to ensure the light field in the core and the energy of the evanescent wave field in the fiber cladding will not leak out of the fiber. The side edge polishing fiber is used to reduce the thickness of the cladding of the fiber to the region of the evanescent wave field, that is, when the core is only a few microns from the core, the "leakage window" of the evanescent wave field in the core is formed. In this "window", there is an evanescent wave field to excite, control and detect fiber core. The possibility of transmitting light waves in the medium has been made into all kinds of optical fiber devices and optical fiber sensors. The micro nano fiber is heated by a flame or other heating device to remove a section of a protective layer by a single standard single mode fiber. When the fiber is softened, the two ends of the heating zone are passed. The micro nano fiber has become the basis of the construction of a new micro nano optical system. This paper studies the light controllable characteristics of two devices based on the side side polished fiber and the methyl blue stone ink based micro nano optical fiber based on graphene, and the side edge polishing by using the special optical properties of the deposited materials. The optical controllability of optical fiber and micro nano fiber is studied and explored. Using the saturated absorption characteristics of graphene and methyl blue methylene, the power change of signal light in side polished fiber and micro nano fiber is controlled by 405nm pumping light. When the power of the signal light in the optical fiber is changed, the conclusion can be deduced from the conclusion of the experiment. The power of the pump light is used to detect the sensing power of 405nm light. By means of natural evaporation deposition, graphene is deposited in the polishing area of the side edge polishing fiber, the polishing area of the graphene is irradiated with the pumping light of the wavelength of 405nm, and the change of the signal power in the optical fiber is measured. The experimental results show that the side edge polishing fiber covering the graphene is used for the 405nm pump. The light power of the pup light has a high sensitivity. The maximum light transmission power change within the range of the pump light reaches 3.4d B. It is proved that the side edge polishing fiber of the deposited graphene has a good 405nm light controllability. The analysis of the experimental data shows that the side side polishing fiber of the deposited graphene has the light controllable characteristic of the pump light power rising. The sensitivity is 0.29d B/mw with a linearity of 97.1%, and the sensitivity of the light controllable characteristic of the pump light power is 0.25D B/mw and the linearity is 96.5%.. Therefore, the study on the light controllability of the side polishing fiber based on graphene has good repeatability. The micro nano area of the methyl blue stone methylene is deposited by the pumping light of the wavelength 405nm, and the change of the signal power in the optical fiber is measured. The experimental results show that the transmission light power of the microsatellite is linear with the light power of the 405nm pump, and the linear correlation coefficient can reach 98.1% when the communication wavelength 1550nm is detected. The sensitivity of optical power is 0.22d B/mw. innovation in this paper: 1. the optical control characteristics of side side polished fiber based on graphene are studied by the method of pump light external irradiation, and the linear relationship between output power and pump light power is obtained. The side side polishing fiber based on graphene has a good line for milliwatts pump light. In response to.2., the optical control characteristics of the micro nano fiber based on the new methyl blue stone ink are studied by the method of pump light external irradiation. The linear relationship between the pump power and the output power is obtained, and the response bandwidth is 100nm..

【學(xué)位授予單位】：暨南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN253

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