Liquid modified photonic crystal fiber for simultaneous temperature and strain measurement

• DOI: 10.1364/prj.5.000129
• Publication Date: 2017-03-06T22:41:48Z
• Authors: Chupao Lin; Ying Wang; Yijian Huang; Changrui Liao; Zhiyong Bai; Maoxiang Hou; Zhengyong Li; Yiping Wang
• Keywords: Refractive index contrast

A liquid modified photonic crystal fiber (PCF) integrated with an embedded directional coupler and multi-mode interferometer is fabricated by infiltrating three adjacent air holes of the innermost layer standard 1.48 refractive index liquids. The filled higher than that background silica, which can not only support transmitting rod modes but also “liquid core” propagating between PCF core rods. Hence, light in be efficiently coupled into satellite waveguides under phase-matching conditions, resulting a dramatic decrease resonant wavelength intensity. Furthermore, there interference produced modes. Such compact (∼0.91 cm) device demonstrated for high-sensitivity simultaneous temperature (∼14.72 nm/°C) strain (∼13.01 pm/μϵ) measurement.