title: Fiber in-line Mach-Zehnder interferometer based on near-elliptical core photonic crystal fiber for temperature and strain sensing.
abstract: A fiber in-line Mach-Zehnder interferometer is fabricated by selectively filling liquid into one air hole of the innermost layer of a photonic crystal fiber (PCF). The refractive index of the liquid is so close to that of the background silica in the wavelength range of 1300-1600 nm that the two-mode PCF evolves into multimode PCF with an elliptically shaped core. Due to the different propagation constants, interference can occur between the fundamental mode and higher-order modes of the liquid-filled PCF. Such a device is applied in temperature and strain measurements with high sensitivities of 16.49 nm/°C and -14.595 nm/N, respectively.
authors: Hu
authors: H
authors: Liang
authors: Weigang
authors: W
authors: Zhang
authors: Huayu
authors: H
authors: Wang
authors: Pengcheng
authors: P
authors: Geng
authors: Shanshan
authors: S
authors: Zhang
authors: Shecheng
authors: S
authors: Gao
authors: Chunxue
authors: C
authors: Yang
authors: Jieliang
authors: J
authors: Li