Advances of high-birefringence fiber loop mirror sensors

High-Birefringence fiber loop mirror(Hi-Bi FLM) sensor has been one of the hot issues in optical fiber sensor technologies. This paper introduced the fundamental principle of Hi-Bi FLM and also characterized the temperature and strain features of conventional and photonic crystal Hi-Bi FLM. Furthermore, we selectively enumerated various simultaneous measurements of temperature and strain based on Hi-Bi FLM, and the distinguishes between them were particularly analyzed. These measurements not only avoided the problems of cross-sensitive but also expanded the Hi-Bi FLM application fields.