Optical fiber specklegram sensors for mechanical measurements: A review

AG Leal-Junior, A Frizera, C Marques… - IEEE Sensors …, 2019 - ieeexplore.ieee.org
This paper presents a review of FSS technology. The operation principle and main
characteristics of specklegram are presented and the applications of FSSs are thoroughly …

[HTML][HTML] Optical fiber sensors for heart rate monitoring: A review of mechanisms and applications

R He, L Shen, Z Wang, G Wang, H Qu, X Hu, R Min - Results in Optics, 2023 - Elsevier
As an important part of the medical health monitoring field, heart rate (HR) monitoring has
become an important application field of sensing technology in recent years. Due to the …

Machine learning for turning optical fiber specklegram sensor into a spatially-resolved sensing system. Proof of concept

AR Cuevas, M Fontana, L Rodriguez-Cobo… - Journal of Lightwave …, 2018 - opg.optica.org
Fiber Specklegram Sensors (FSSs) are highly sensitive to external perturbations, however,
trying to locate perturbation's position remains as a barely addressed study. In this work, a …

Machine learning for sensing with a multimode exposed core fiber specklegram sensor

DL Smith, LV Nguyen, DJ Ottaway, TD Cabral… - Optics express, 2022 - opg.optica.org
Fiber specklegram sensors (FSSs) traditionally use statistical methods to analyze
specklegrams obtained from fibers for sensing purposes, but can suffer from limitations such …

Deep learning for estimating deflection direction of a multimode fiber from specklegram

S Razmyar, MT Mostafavi - Journal of Lightwave Technology, 2021 - opg.optica.org
This study presents a novel approach and proof-of-concept for measuring the deflection
direction of a multimode fiber's tip through analysis of the shape and structure of speckle …

Weight-location recognition in a plastic optical fiber using a convolutional neural network

N Vangety, K Dey, S Roy - Optical Fiber Technology, 2023 - Elsevier
Convolutional neural networks (CNNs) have proven to be highly efficient in performing
arduous tasks such as image reconstruction, image classification, etc. on multimode fiber …

Deep learning-based fiber bending recognition for sensor applications

D Bender, U Çakır, E Yüce - IEEE Sensors Journal, 2023 - ieeexplore.ieee.org
The sensitivity of multimode fibers (MMFs) to mechanical deformations has led to their
widespread use in various fields, such as structural monitoring and healthcare. However …

Transfer learning and generalization of a neural-network-based multimode fiber position and imaging sensor under thermal perturbations

N Bagley, T Kremp, ES Lamb, PS Westbrook - Optical Fiber Technology, 2022 - Elsevier
Fiber specklegrams created through multimode fibers have been utilized in a wide variety of
imaging and sensing applications. In a practical environment it is useful to have a system …

Refractive index sensing based on the analysis of D-shaped multimode fiber specklegrams

G Mu, Y Liu, Q Qin, Z Tan, G Li… - IEEE Photonics …, 2020 - ieeexplore.ieee.org
Mode excitations in D-shaped multimode fiber are analyzed in detail in terms of the effect of
launch offset, polishing depth, and length of the D-shaped section. Based on the analysis …

Investigation on refractive index sensing characteristics based on multimode fiber specklegram

L Cai, M Wang, Y Zhao - Measurement Science and Technology, 2022 - iopscience.iop.org
In this study, the refractive index (RI) sensing characteristic of a single mode fiber (SMF)-
multimode fiber (MMF) structure is investigated, and the two demodulation methods of …