The unique structural characteristic of no-core fiber (NCF) have extended the sensing applications based on multimode interference self-imaging, evanescent wave absorption and materials coating, which are widely used in the measurement of various physical, chemical and biological parameters. An overview of the NCF-based sensing applications is spread out with specific emphasis on measurement methods, structural improvements and the combination of sensitive materials. Different prototypes of NCF-based sensors are meticulously outlined. First, the single NCF-based sensors with different analysis principles are reviewed, and the advantages of structural improvement including fiber taper, lateral-offset fusing and internal waveguide writing are compared. Second, the cascading of NCF with fiber gratings or other structures to realize multi-parameter measurement and widen the application field are also discussed. Then, NCF combines sensitive materials to measure physical/chemical parameters or coats metal film to excite surface plasmon resonance are addressed, and representative examples of the latest research progress are presented to confirm the potential value of NCF-based sensors in biosensing. What’s more, the sensing characteristics of applying NCF structure in different ways are also introduced. In a whole, this article detailedly summarizes the sensing applications, concludes the challenges and points out the research direction in the development of NCF-based sensors.

无芯光纤（NCF）的独特结构特性扩展了基于多模干涉自成像，e逝波吸收和材料涂层的传感应用，被广泛用于各种物理，化学和生物学参数的测量。对基于NCF的传感应用进行了概述，并特别强调了测量方法，结构改进和敏感材料的组合。精心概述了基于NCF的传感器的不同原型。首先，回顾了具有不同分析原理的单个基于NCF的传感器，并比较了结构改进的优势，包括光纤锥度，横向偏移融合和内部波导写入。第二，还讨论了用纤维光栅或其他结构将NCF级联以实现多参数测量并扩大应用领域。然后，NCF结合了敏感材料以测量物理/化学参数或覆盖金属膜以激发表面等离子体激元共振，并提出了最新研究进展的代表性实例，以确认基于NCF的传感器在生物传感中的潜在价值。此外，还介绍了以不同方式应用NCF结构的传感特性。总体而言，本文详细总结了传感应用，总结了挑战并指出了基于NCF的传感器开发的研究方向。NCF结合了敏感材料来测量物理/化学参数或覆盖金属膜以激发表面等离子体激元共振，并提出了最新研究进展的代表性实例，以确认基于NCF的传感器在生物传感中的潜在价值。此外，还介绍了以不同方式应用NCF结构的传感特性。总体而言，本文详细总结了传感应用，总结了挑战并指出了基于NCF的传感器开发的研究方向。NCF结合了敏感材料来测量物理/化学参数或覆盖金属膜以激发表面等离子体激元共振，并提出了最新研究进展的代表性实例，以确认基于NCF的传感器在生物传感中的潜在价值。此外，还介绍了以不同方式应用NCF结构的传感特性。总体而言，本文详细总结了传感应用，总结了挑战并指出了基于NCF的传感器开发的研究方向。介绍了以不同方式应用NCF结构的传感特性。总体而言，本文详细总结了传感应用，总结了挑战并指出了基于NCF的传感器开发的研究方向。介绍了以不同方式应用NCF结构的传感特性。总体而言，本文详细总结了传感应用，总结了挑战并指出了基于NCF的传感器开发的研究方向。