Guest Editorial Special Issue on Advances in Fiber Optic Sensing Technologies

Fiber optic sensors have contributed a huge market for sensing some quantity, typically temperature or mechanical strain, and even for displacements, vibrations, pressure, acceleration, rotations, or concentrations of chemical species. The application in defense and engineering remains the largest market for fiber optic sensors (FOSs). The success of the bulk fiber optic sensor has greatly motivated the success of new types of fiber sensors, especially nanophotonics, biodiagnostics, and biophotonics.