Title :
Inline Microfiber Mach–Zehnder Interferometer for High Temperature Sensing
Author :
Jasim, Ali A. ; Harun, Sulaiman Wadi ; Arof, Hamzah ; Ahmad, Harith
Author_Institution :
Dept. of Electr. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia
Abstract :
A compact inline microfiber Mach-Zehnder interferometer (MMZI) is proposed for high temperature sensing. The MMZI is fabricated using a flame-brushing technique in which both transition parts of a microfiber are tapered to reduce the waist diameter and form an interference region. Since the refractive index of the fiber core exhibits a different temperature coefficient from that of air, the interferometer is sensitive to temperature variation. The temperature sensitivity of the device with a length of 40 mm was measured to be 13.4 pm/°C with an excellent linearity for temperature measurement up to 800°C.
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; flames; microfabrication; microsensors; refractive index; temperature measurement; temperature sensors; MMZI; fiber core; flame brushing technique; high temperature sensor; inline microfiber Mach-Zehnder interferometer; interference suppression; microfabrication; refractive index; size 40 mm; temperature coefficient; temperature measurement; temperature sensitivity measurement; Educational institutions; Interference; Optical fiber sensors; Refractive index; Temperature measurement; Temperature sensors; Flame-brushing technique; high-temperature sensor; inline Mach–Zehnder interferometer (MZI); microfiber;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2012.2224106
