Title :
Microfiber-Based Inline Mach–Zehnder Interferometer for Dual-Parameter Measurement
Author :
Haipeng Luo ; Qizhen Sun ; Zhilin Xu ; Weihua Jia ; Deming Liu ; Lin Zhang
Author_Institution :
Nat. Eng. Lab. for Next Generation Internet Access Syst., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
An approach to realizing simultaneous measurement of refractive index (RI) and temperature based on a microfiber-based dual inline Mach-Zehnder interferometer (MZI) is proposed and demonstrated. Due to different interference mechanisms, as one interference between the core mode and the lower order cladding mode in the sensing single-mode fiber and the other interference between the fundamental mode and the high-order mode in the multimode microfiber, the former interferometer achieves RI sensitivity of -23.67 nm/RIU and temperature sensitivity of 81.2 pm/°C, whereas those of the latter are 3820.23 nm/RIU, and -465.7 pm/°C, respectively. The large sensitivity differences can provide a more accurate demodulation of RI and temperature. The sensor is featured with multiparameters measurement, compact structure, high sensitivity, low cost, and easy fabrication.
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; light interference; micro-optics; microsensors; optical fibre fabrication; refractive index measurement; temperature measurement; MZI; RI sensitivity; compact structure; core mode; dual-parameter measurement; easy fabrication; fibre optic sensor; high sensitivity; interference mechanisms; low cost; lower order cladding mode; microfiber-based inline Mach-Zehnder interferometer; multiparameters measurement; refractive index measurement; sensing single-mode fiber; temperature measurement; temperature sensitivity; Interference; Optical fiber sensors; Optical fibers; Sensitivity; Temperature measurement; Temperature sensors; Sensors; Temperature; refractive index; subwavelength structure; subwavelength structures; temperature;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2395133
