Study of fiber-optic sensing system based on the laboratory-on-a-fiber concept

该计划的主要研究目标是开展基于光纤实验室(LOF)概念的新型光纤传感设备的基础研究，这些设备可作为危险物质的远程探测器用于安全和安保或环境监测。这些器件将基于光子晶体光纤(PCF)和各种功能化涂层，用于选定化学目标的光子传感应用。该计划还包括在先进的基于LOF的先进通用技术平台的技术开发、原型制作、测试和实施方面的主要应用推动力，该平台用于包含待开发的传感设备的光纤传感器系统。研究计划包括具体的短期和长期目标。作为传感器件级别的第一个目标，将研究和开发基于光子晶体光纤的新一代光纤传感器，以开发具有可编程特性的全新类型的器件。这些设备将使用各种方法进行专门设计，包括长周期光栅、串联光栅和特定于任务的光纤段，并结合少模和多模干涉测量。一个实用的目标是通过适当的微结构建模来选择性地设计和优化这些器件的传输、偏振和光收集特性，然后通过适当的工艺过程来制造它们。第二个目标是随后为这些设备配备各种功能化涂层，以诱导表面等离子激元共振、荧光猝灭或其他效应，从而能够选择性地检测各种预期的化学/生物目标。因此，我们期望设计和制造具有卓越计量性能的光纤传感器，包括选择性地增强对选定目标的灵敏度、对温度的灵敏度大大降低以及可忽略的误检率。由于新传感器的灵活特性和我们LOI系统方法的处理功能/适应性，它们将与许多特定的传感器配置兼容。

The principal research objective of this program is to conduct fundamental studies of novel fiber-optic sensing devices based on the lab-on-a-fiber (LOF) concept which could be used in safety and security or environmental monitoring as remote detectors of dangerous substances. These devices will be based on photonic crystal fibers (PCFs) and on a variety of functionalized coatings, for applications in photonic sensing of selected chemical targets. The program also includes a major applied thrust in technology development, prototyping, testing and implementation of an advanced universal LOF-based technological platform for fiber-optic sensor systems incorporating the sensing devices to be developed. The research plan includes specific short-term and long-term objectives. As the first objective at the sensing device level, studies and development of a novel generation of fiber-optic sensors based on PCFs will be undertaken to develop an entirely new class of devices with programmable properties. These devices will be specifically designed using a variety of approaches, involving long-period gratings, tandem gratings and task-specific fiber segments, in combination with few-mode and multimode interferometry. A practical objective is to selectively design and optimize the transmission, polarization, and light collection properties of these devices through appropriate microstructural modeling, and then to fabricate them through appropriate technological processes. A second objective is to subsequently equip these devices with a variety of functionalized coatings, in order to induce surface plasmon resonance, fluorescence quenching or other effects allowing for selective detection of a wide variety of intended chemical/biological targets. Consequently, we expect to design and manufacture fiber sensors with superior metrological properties, including selectively enhanced sensitivity to a chosen target, highly decreased sensitivity to temperature and negligible false positive ratio. Due to the flexible properties of the new sensors and the processing functionality/adaptability of our LOI system approach, they will be compatible with many specific sensor configurations.