Optimization of high-accuracy FBG wavelength demodulation based on spectral correction and algorithm compensation
Year: 2025
Type: article
Abstract: Despite the widespread use of array waveguide gratings in fiber Bragg grating demodulation systems, its practical implementations are limited by nanoscale size control and processing accuracy, leading to spectral inconsistencies that affect wavelength demodulation. We propose a spectral correction and compensation algorithm combining bandwidth matching and Gaussian fitting to improve demodulation accuracy. Simulation results show a 74.5% relative improvement in demodulation accuracy under 0-4 dB insertion loss uniformity, with effective suppression of degradation. Experimental results further validate the algorithm, improving accuracy from 25.58 pm to 8.82 pm (65% relative improvement) under 3.88 dB spectral insertion loss uniformity.
Source: Optics Express
DOI: 10.1364/oe.561421
Authors: Yunjing Jiao, Qijing Lin, Kun Yao, Na Zhao, Man Zhao, Chaoyi Tang, Yueqi Zhao, Kaichen Ye, Changsheng Li, Zhuangde Jiang
Institutions: Xi'an Jiaotong University, Xiamen Institute of Technology
Language: English
Topic: Advanced Fiber Optic Sensors
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: G5735179491, G6487497365, G8227014830
OpenAlex ID: W4410485707