Open AccessCoexistence of transmission mechanisms for independent multi-parameter sensing in a silica capillary-based cascaded structure
Author(s) -
Yang Yu,
Xiaobei Zhang,
Kehong Wang,
Zijie Wang,
HongBo Sun,
Yong Yang,
Chuanlu Deng,
Yi Huang
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.435097
Subject(s) - cladding (metalworking) , optics , materials science , transmission (telecommunications) , capillary action , fourier transform , interference (communication) , spectral line , sensitivity (control systems) , physics , electronic engineering , computer science , telecommunications , computer network , channel (broadcasting) , quantum mechanics , astronomy , metallurgy , composite material , engineering
The coexistence of transmission mechanisms, including Fabry-Perot (FP), Mach-Zehnder (MZ), and anti-resonant (AR), is demonstrated via a silica capillary-based cascaded structure. The analysis for MZ shows that one pathway is formed by the beam refracted into the silica capillary cladding from the air core, rather than being transmitted into the cladding directly at the splicing interface. Using the ray optics method, the two coexistence conditions are derived for FP and MZ, and for FP, MZ and AR, respectively. The existence percentages of the three mechanisms can be obtained using the fast Fourier transform. Finally, the coexistence of multiple transmission mechanisms is applied for independent multi-parameter sensing with the FP-based temperature sensitivity of 10.0 pm/°C and AR-based strain sensitivity of 1.33 nm/N. The third mechanism MZ interference can assist in verifying changes in both the temperature and axial strain. This shows the possibility to optimize the transmission spectra for independent multi-parameter sensing by tailoring the existence percentages of different mechanisms.