GOALI: Nanostructured Sapphire Optical Fiber for Sensing in Harsh Environment

GOALI：用于恶劣环境中传感的纳米结构蓝宝石光纤

• 批准号: 1506179
• 负责人: Henry Du
• 金额: $ 40.67万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-15 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506179&HistoricalAwards=false
• 关键词: GOALI; Nanostructured; Sapphire; Optical; Fiber

NON-TECHNICAL DESCRIPTION: The excellent potential of sapphire optical fiber for sensing in harsh environments such as those encountered in advanced combustion-based energy generation systems for high operation efficiency and low emission has long been recognized. The lack of viable cladding on sapphire fiber for low-loss light transmission and fiber protection remains the roadblock to real-world applications. This project aims to develop a novel alumina cladding with highly organized nano-sized air channels on sapphire fiber and to understand the associated processing-structure-property-performance correlations for evanescent-field chemical sensing and measurements via a strategy of fiber coating with aluminum followed by its anodization. The success of the project has the potential to overcome the decades-old sapphire fiber cladding challenge as well as offer a myriad of opportunities to transformative sapphire fiber-optic technology especially for sensing under adverse conditions where silica fiber sensors are no longer suitable. This project is carried out in partnership between Stevens Institute of Technology and Fiberguide Industries, Inc. TECHNICAL DETAILS: The inability to fabricate stable and high-quality cladding of controlled optical properties severely hampers the design and development of sapphire fiber sensors for a host of applications, particularly in corrosive environments at high temperatures. This project aims to develop and evaluate nanostructured alumina cladding on sapphire fiber for evanescent-field chemical sensing and measurements. The main objectives are: (1) evaluation of the theoretical correlation between mode-field overlap and cladding nanostructure to guide cladding fabrication; (2) determination of the window of processing parameters for aluminum coating and anodization as well as scale-up at Fiberguide; and (3) establishment and understanding of the interplay between the cladding nanostructure and sensing performance in combustion environment using evanescent-field laser absorption and surface-enhanced Raman scattering as the detection modalities. This project is transformative in that it has the potential to resolve the bottle-neck cladding problem long-faced by sapphire fiber and that the resultant specialty optical fiber may well lead to significant development of sapphire fiber-optic technology. Furthermore, industrial partnership and international collaboration as an integral part of the research activities greatly enriches the educational and research training experiences of the doctoral, undergraduate and high-school scholars participating in this project.

非技术描述：蓝宝石光纤在恶劣的环境中感测的巨大潜力，例如基于先进的基于高级燃烧的能源产生系统遇到的高运行效率和低排放的能力。蓝宝石纤维上缺乏可行的覆层无法用于低损失的轻型传输和纤维保护，仍然是现实世界应用的障碍。该项目旨在开发一种新型的氧化铝层层，并在蓝宝石纤维上使用高度有条理的纳米大小的空气通道，并了解通过用铝涂层的纤维涂层进行铝涂层的策略，以实现evanescent-Field田间化学感测和测量的相关加工结构 - 绩效相关性。该项目的成功有可能克服数十年来的蓝宝石纤维覆层挑战，并为转化性蓝宝石纤维的技术提供了无数的机会，尤其是在不再适合硅胶纤维传感器的不利条件下传感。该项目是由史蒂文斯技术学院与光纤工业公司（Fiberguide Industries，Inc.该项目旨在开发和评估蓝宝石纤维上的纳米结构氧化铝覆盖层，以进行evanescent-Field田间化学感应和测量。主要目标是：（1）评估模式场重叠和覆层纳米结构之间的理论相关性，以指导覆层制造； （2）确定铝制涂层和阳极氧化和阳极氧化和尺寸上升的加工参数窗口； （3）使用evaneScent-Field-Field-Field激光吸收和表面增强的拉曼散射作为检测方式，建立和理解覆盖纳米结构与传感性能之间的相互作用。该项目具有变革性，因为它有可能解决蓝宝石纤维长期面对面的瓶颈覆层问题，并且由此产生的专业光纤很可能会导致蓝宝石光纤技术的重大发展。此外，作为研究活动不可或缺的一部分，工业合作伙伴关系和国际合作非常丰富了参与该项目的博士，本科和高中学者的教育和研究培训经验。