Title :
Mach–Zehnder Interferometer Based on S-Tapered All-Solid Photonic Bandgap Fiber
Author :
Biao Wang ; Weigang Zhang ; Jieliang Li ; Tieyi Yan ; Liyu Zhang ; Lei Chen ; Quan Zhou
Author_Institution :
Key Lab. of Opt. Inf. Sci. & Technol., Nankai Univ., Tianjin, China
Abstract :
We propose an S-tapered fiber Mach-Zehnder interferometer based on all-solid photonic bandgap fibers. Theoretical and experimental results reveal that the interference pattern originates from the coupling between core modes LP01 and LP11, LP01 cladding supermode. The proposed structure exhibits quite sensitive to temperature and nearly insensitive to surrounding refractive index (RI). Moreover, the temperature-strain cross sensitivity is only 0.0092 °C/με. The strain/surrounding RI responses show little impact on the temperature sensing precision. Such a structure is easy to fabricate and can be a promising temperature sensor, eliminating the RI/strain-induced cross sensitivity.
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; holey fibres; photonic band gap; refractive index; strain sensors; temperature sensors; LP01 cladding supermode; LP11 cladding supermode; S-tapered all-solid photonic bandgap fiber; S-tapered fiber Mach-Zehnder interferometer; core modes; interference pattern; refractive index; temperature sensor; temperature-strain cross sensitivity; Interference; Optical fiber sensors; Photonic bandgap fibers; Sensitivity; Temperature measurement; Temperature sensors; S-tapered structure; S-tapered structure,; all-solid photonic bandgap fibers; refractive index; strain; temperature;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2443861
