基于石墨烯的侧边抛磨光纤和微纳光纤光控特性研究

发布时间：2018-04-21 00:35

本文选题：光纤传感 + 侧边抛磨光纤　；参考：《暨南大学》2015年硕士论文

【摘要】：光纤传感是光纤技术的一个重要领域,其发展始于20世纪70年代,一经问世就受到极大重视,几乎在各个领域都得到研究与应用,成为传感技术的先导。侧边抛磨光纤与微纳光纤作为光纤传感器的两种基底也在光电传感检测方面得到了广泛的应用并且起着重要的作用。石墨烯是由单层碳原子构成的二维蜂窝状结构晶体,碳原子排列与石墨的单原子层相同,是一种结合了半导体和金属属性的碳质新材料。石墨烯的发现被预测很有可能在很多领域引起革命性变化。由于石墨烯结构完整,化学稳定性高,其表面呈惰性状态,与其它介质的相互作用较弱,并且石墨烯的片与片之间有较强的范德华力,容易产生聚集,使其在水及常见的有机溶剂中难于分散,这给石墨烯的进一步研究和应用造成了困难。因此,本文研究的甲基蓝石墨烯是采用将一种芳香族水溶性小分子甲基蓝修饰到石墨烯分子上得到水性化石墨烯。单模光纤中,通常足够厚度的光纤包层保证了在纤芯中传播的光场以及在光纤包层中倏逝波场的能量不会泄漏到光纤外面。侧边抛磨光纤是用抛磨的方法使光纤的包层厚度减小到倏逝波场存在的区域,也就是距纤芯仅几个微米的区域时,就形成了纤芯中传输光倏逝波场的“泄漏窗口”。在此“窗口”处,就存在了利用倏逝波场来激发、控制、探测光纤纤芯中的传输光波的可能。利用这一特性,已制作成为各类光纤器件和光纤传感器。微纳光纤是在火焰或其他加热装置的加热下,对单根标准单模光纤去掉一截保护层的区域进行加热,待加热段光纤达到软化状态时,通过对加热区域两端的光纤进行拉伸使得光纤逐渐变细而得到。微纳光纤已经成为构建新型微纳光学系统的基础。本论文研究基于石墨烯的侧边抛磨光纤和基于甲基蓝石墨烯的微纳光纤两种器件的光可控特性,利用其沉积材料的特殊光学特性,对侧边抛磨光纤与微纳光纤进行了光可控特性研究与探索。利用石墨烯与甲基蓝石墨烯的饱和吸收特性,用405nm的泵浦光来控制侧边抛磨光纤与微纳光纤中信号光的功率变化。当已知光纤中信号光的功率变化时,根据实验得出的结论可以推导出泵浦光的功率,实现探测传感405nm光功率。以自然蒸发沉积的方法将石墨烯沉积到侧边抛磨光纤的抛磨区,用波长405nm的泵浦光照射沉积石墨烯的抛磨区,测量光纤中的信号光功率变化。实验结果表明覆盖石墨烯的侧边抛磨光纤对405nm泵浦光的光可控有较高的灵敏度。在泵浦光变化范围内,其透过光功率最大变化达3.4d B,证明了沉积石墨烯的侧边抛磨光纤具有良好的405nm光可控特性。实验数据的分析表明沉积石墨烯的侧边抛磨光纤对泵浦光功率上升的光可控特性灵敏度为0.29d B/mw,线性度为97.1%;对泵浦光功率下降的光可控特性灵敏度为0.25d B/mw,线性度为96.5%。因此基于石墨烯的侧边抛磨光纤光可控特性研究具有良好的重复性。以自然蒸发沉积的方法将甲基蓝石墨烯沉积到微纳光纤的微纳区,用波长405nm的泵浦光照射沉积甲基蓝石墨烯的微纳区,测量光纤中的信号光功率变化。实验结果表明沉积甲基蓝石墨烯的微纳光纤传输光功率与405nm泵浦光的光功率呈线性关系;当使用通信波长1550nm检测时,线性相关系数可达98.1%,检测紫光功率的灵敏度为0.22d B/mw。本论文创新之处:1.采用泵浦光外部照射的方法,研究了基于石墨烯的侧边抛磨光纤光控特性,并获得了输出功率与泵浦光功率呈良好的线性关系,基于石墨烯的侧边抛磨光纤对毫瓦量级的泵浦光有很好的线性响应。2.采用泵浦光外部照射的方法研究了基于新型甲基蓝石墨烯的微纳光纤光控特性,获得了泵浦光功率与输出功率呈良好的线性关系,且响应带宽为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..

【学位授予单位】：暨南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN253

【参考文献】