Open AccessInfluence of ambient refractive index on radiation modes
Author(s) -
Tian Yu Lu,
Yang Li
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.4312
Subject(s) - refractive index , radiation , optics , absorption (acoustics) , propagation constant , mode (computer interface) , materials science , computational physics , physics , computer science , operating system
To explore fibre refractive index (RI) sensing based on radiation modes, the influences of ambient RI on radiation modes are investigated by a leaky mode approximation in a two‐layer fibre. Based on the analytical analysis and simulation results, it is identified that the change of ambient RI has no effect on the real part of the complex propagation constant of a leaky mode, but a remarkable effect on the imaginary part. More importantly, the influence of the medium's absorption loss on the imaginary part is almost negligible. If the medium's absorption loss is lower than 3.521 × 10 3 dB/cm, the induced average deviation rate of the imaginary part is <1.91%.