Highly-birefringent Photonic Crystal Fiber with Squeezed Lattice for Strain, Curvature and Temperature Sensing

Abstract

Highly-Birefringent Photonic Crystal Fiber (Hi-Bi PCF) is composed of a single material, silica, so that its temperature sensitivity is extremely low. Therefore, we propose afiber based Sagnac interferometer for measurement of strain and curvature independent of temperature variation. The sensitivities of strain and curvature (both axes) are measured to be 1.41 pm/με and 0.93nm/m -1 (slow axis Y), -1.6 nm/m -1 (fast axis X), respectively.