Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
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.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.561421 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
To overcome the difficulty of effective, real-time, and rapid detection of cell activities in biological experiments, an optical fiber-based microcantilever biosensor is designed and prepared using microelectromechanical system (MEMS) technology. The cantilever beam is integrated with a single-mode fiber to form a Fabry-Perot interferometer (FPI). After the cells attach to the cantilever, changes in the resonance wavelengths of the interference spectra are monitored to detect the cantilever fluctuations caused by cell movements.
View Article and Find Full Text PDFMiniature and low-power high-precision FBG interrogator with self-temperature compensation.
Opt Express
March 2025
A compact fiber Bragg grating (FBG) interrogator, integrating an arrayed waveguide grating (AWG) chip, photodiode (PD) array, and demodulation circuits within an 85 × 60 × 40 mm volume, has been designed and fabricated. Utilizing what we believe to be a novel three-point demodulation technique, precise center wavelength demodulation is achieved. The conventional thermoelectric cooler (TEC) is supplanted by a look-up table (LUT) in conjunction with interpolation for temperature compensation.
View Article and Find Full Text PDFExtracting valid information from low-resolution spectra is challenging and often compromised in many application scenarios due to the high costs associated with acquiring high-resolution spectra, which typically necessitates more sophisticated equipment. To address this challenge, this paper proposes a well-designed novel residual convolutional neural network (ResNet) to enhance spectral resolution for long-period fiber gratings (LPFG) under large stress measurement conditions. This method captures transmission spectra using a low-resolution interrogator (0.
View Article and Find Full Text PDFResearch on fiber Bragg grating Fabry-Perots bending sensor based on principal component analysis.
Opt Express
February 2025
Optical fiber sensors have advantages such as small size and good biocompatibility, leading to widespread interest in the field of hand motion tracking. In this work, we designed a multi-core fiber Bragg grating Fabry-Perots (FBG-FPs) sensor based on FP interference theory. We inscribed short FBGs with different wavelengths in different fiber cores to form the FP, and then employed thermal diffusion technology for single-channel acquisition of the multi-core fiber FBG-FPs sensor.
View Article and Find Full Text PDFEnvironmental disturbances in the leading fiber are a significant source of noise in remote fiber optic interferometric sensors (FOIS). As the two interrogation lightwaves propagate through the leading fiber, environmental disturbances can induce undesired demodulated phase noises, collectively referred to as leading-fiber-induced noise. This study proposes what we believe to be a novel method for leading-fiber-induced noises self-suppression, utilizing dual-wavelength optical signals as mutual reference signals, thereby eliminating the need for a reference interferometer.
View Article and Find Full Text PDF