A. Leal-Junior, C. Marques, H. Lee, K. Nakamura, and Y. Mizuno, “Sensing applications of polymer optical fiber fuse,” Adv. Photon. Res., 2100210 (2021), before inclusion in an issue.
This paper presents a review of the fuse effect in polymer optical fibers (POFs) and its sensing applications. First, we discuss the propagation mechanisms and the characteristics of the POF fuse, showing that its optical threshold power and propagation velocity are much lower than those of silica fiber fuse. In addition, we show that the main unique advantages of the POF fuse are its capability of transmitting optical signal as well as the electrical conductivity of the carbonized oscillatory path created in the fiber core. We also describe the physical properties of the fused POF, such as its higher elasticity and stability to external effects. Subsequently, we review some applications of fused POFs, such as temperature, strain, force, and angle sensors with higher sensitivity and stabler operation than those of non-fused POF-based sensors. Finally, future perspectives on fused-POF-based sensing are discussed, where the magnetic field sensitivity plays an important role in implementing the optical devices. Thus, the unique features of fused POFs can provide a new paradigm for the fuse effect in optical fibers, in which the effect can be intentionally ignited for fabrication of novel in-fiber devices and sensors with extended capabilities.