Open AccessInvestigation of longitudinal uniformity of the core structure in a hollow-core photonic bandgap fiber
Author(s) -
Xiaojun Xu,
Yuan Xiu-gan,
Fuyu Gao,
Xiaoyang Wang,
Ningfang Song
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.442710
Subject(s) - optics , core (optical fiber) , materials science , photonic crystal fiber , photonic bandgap , fiber , interference (communication) , optical fiber , photonics , graded index fiber , photonic crystal , optoelectronics , fiber optic sensor , telecommunications , physics , composite material , channel (broadcasting) , computer science
In this study, a low-noise Fabry-Perot interference-based method is promoted to measure the longitudinal uniformity of the distance between six pairs of opposite silica-air interfaces within the core of a seven-cell hollow-core photonic bandgap fiber. The experimental results demonstrate that the precision of the method is improved to the subnanometer scale. Based on the test results, a model is established to study the effect of the longitudinal uniformity of the core structure on the fiber loss, and the simulation results indicate that the fiber loss could reach ∼22.73 dB/km, which is consistent with the practical loss value.