Article
Engineering, Electrical & Electronic
Soroush Razmyar, M. Taghi Mostafavi
Summary: This study proposes a novel approach to measuring the deflection direction of a multimode fiber's tip using speckle patterns analysis and a convolutional neural network model. Experimental results demonstrate the feasibility of using speckle patterns for this purpose. The study also sheds light on the generalization capabilities of speckle patterns analysis in sensing the direction of deflection.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Yanzhu Zhang, Hao Wu, He Zhao, Yong Chen
Summary: Researchers build an optical imaging system using up-conversion imaging technology to collect speckle patterns generated by infrared light transmitting through a multimode fiber and a frequency-doubling crystal. They propose a speckle restoration network (SRNet) based on a generative adversarial network (GAN) to reconstruct speckle images. With the designed network, high-quality images were successfully reconstructed even with only a portion of the speckle information.
Article
Chemistry, Analytical
Jonathan Philosof, Yevgeny Beiderman, Sergey Agdarov, Yafim Beiderman, Zeev Zalevsky
Summary: This study explores the development and testing of a fiber optic-based pipe monitoring and leakage detector using statistical and machine learning analyses. The experimental results show that the sensor can accurately detect pipe leaks under different conditions, demonstrating high accuracy.
Article
Engineering, Electrical & Electronic
Jie Li, Bin Liu, Juan Liu, Jiu-Lin Shi, Xing-Dao He, Jinhui Yuan, Qiang Wu
Summary: A low-cost wearable pulse and respiratory monitoring system based on D-shaped single mode fiber curvature sensor is proposed. The system achieves real-time monitoring of pulse and respiratory signals by embedding D-shaped optical fiber structure in wristband and belt. The results show that pulse intensity increased and pulse frequency increased after exercise, consistent with medical theory.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Multidisciplinary Sciences
Hyoyoung Jeong, Sung Soo Kwak, Seokwoo Sohn, Jong Yoon Lee, Young Joong Lee, Megan K. O'Brien, Yoonseok Park, Raudel Avila, Jin-Tae Kim, Jae-Young Yoo, Masahiro Irie, Hokyung Jang, Wei Ouyang, Nicholas Shawen, Youn J. Kang, Seung Sik Kim, Andreas Tzavelis, KunHyuck Lee, Rachel A. Andersen, Yonggang Huang, Arun Jayaraman, Matthew M. Davis, Thomas Shanley, Lauren S. Wakschlag, Sheila Krogh-Jespersen, Shuai Xu, Shirley W. Ryan, Richard L. Lieber, John A. Rogers
Summary: This paper presents a new technology for capturing infant kinematic data that can be used in home or clinical settings, while also recording vital signs data. The technology aids in early detection of neuromotor pathologies and has the potential to automate and systematize traditional motor assessments using machine learning techniques.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Engineering, Electrical & Electronic
Qing Wang, Weimin Lyu, Zhi Cheng, Changyuan Yu
Summary: Ballistocardiography (BCG) signal, captured by an optical fiber sensor, is widely used for health monitoring. The proposed ELA model, based on LSTM and VEMD algorithms, demonstrates excellent performance in predicting vital signs such as heart rate and respiration rate, with an R-2 value of 0.9946.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Runchu Xu, Leihong Zhang, Ziyang Chen, Zhiyuan Wang, Dawei Zhang
Summary: Multimode fiber has great potential in miniaturizing optical endoscopes, but it is sensitive to fiber deformations and environmental changes. High accuracy transmission and recognition of complex images through multimode fibers using traditional methods are challenging. This study presents two neural networks, USINET and CSRNET, for high accuracy reconstruction and recognition of complex images under different multimode fiber transmission conditions. The experimental results demonstrate the application prospect of multimode fibers combined with deep learning in minimally invasive medicine.
LASER & PHOTONICS REVIEWS
(2023)
Letter
Optics
Weiru Fan, Ziyang Chen, Vladislav V. Yakovlev, Jixiong Pu
Summary: High-quality signal transmission and imaging through a multimode fiber is crucial for optical communications and medical endoscopic imaging, offering high fidelity of information transfer; however, mode superposition and coupling in a multimode fiber can distort the incident wave and complicate reconstructing the original object; a novel approach, polarization-enhanced parametric speckle imaging, improves imaging quality through a multimode fiber by utilizing polarization properties.
LASER & PHOTONICS REVIEWS
(2021)
Review
Chemistry, Analytical
Christian Perezcampos Mayoral, Jaime Gutierrez Gutierrez, Jose Luis Cano Perez, Marciano Vargas Trevino, Itandehui Belem Gallegos Velasco, Pedro Antonio Hernandez Cruz, Rafael Torres Rosas, Lorenzo Tepech Carrillo, Judith Arnaud Rios, Edmundo Lopez Apreza, Roberto Rojas Laguna
Summary: Fiber optic sensors have made significant advances in monitoring vital signs, especially in respiratory rate. They have the potential to monitor other vital signs through mathematical calculations, algorithms, or auxiliary devices, and their advantages of miniaturization, immunity to electromagnetic interference, and the absence of a power source make them highly desirable for everyday use.
Article
Biochemical Research Methods
Stephen C. Warren-Smith, Adam D. Kilpatrick, Kabish Wisal, Linh V. Nguyen
Summary: This study introduces a fiber optic sensor array that can be embedded into a mattress to detect movement on a bed. The results show that the sensor array has high sensitivity to various movements on the bed, including breathing. This technology has potential applications in healthcare settings for monitoring physiological parameters and patient movement.
JOURNAL OF BIOMEDICAL OPTICS
(2022)
Article
Engineering, Electrical & Electronic
Weijuan Chen, Yi Zhang, Huicheng Yang, Yishen Qiu, Hui Li, Zhihao Chen, Changyuan Yu
Summary: Researches have proposed and demonstrated a non-invasive and continuous ballistocardiogram (BCG) based vital signs monitoring system using a seven-core fiber interferometer (SCFI) sensor, providing a more convenient, compact, and cost-effective way to measure vital signs. Results show that the measured heart rate (HR) and respiratory rate (RR) of the proposed sensor are in good agreement with commercial physiological devices, suggesting promising potential for long-term and non-invasive vital signs monitoring.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Yong Zhang, Zhibao Gong, Yuan Wei, Zhengjia Wang, Junhua Hao, Jianlong Zhang
Summary: In this work, a speckle image reconstruction method based on transfer learning and convolution learning model is proposed, which can effectively reconstruct speckle images and greatly reduce the demand for the quantity of training data.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Optics
Weijuan Chen, Yi Zhang, Zhihao Chen, Hao Zhang, Xiaogang Chen, Yu Zhang, Shuyan Huang, Xiaohua Hu, Xianzeng Zhang
Summary: Long-term monitoring of patients' heartbeat and respiration is crucial for adjusting their care, but current methods are limited by skin contact, causing discomfort and restricting physical activities. This study proposes a new non-invasive monitoring device using a helical long-period grating (HLPG) sensor. The HLPG, fabricated with a single-mode fiber using a CO2 laser, demonstrates high curvature sensitivity (20.16 nm/m-1) for vital sign monitoring. Experimental results on four healthy subjects show that the sensing system can simultaneously monitor vital signs. In conclusion, this sensing system holds promise for long-term monitoring in hospital settings and healthcare.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Food Science & Technology
Yadira Aracely Fuentes-Rubio, Yamil Alejandro Zuniga-Avalos, Jose Rafael Guzman-Sepulveda, Rene Fernando Dominguez-Cruz
Summary: This paper presents a refractometric detection method for water-adulterated milk using an optical fiber sensor based on multimode interference (MMI). The sensor, which is manufactured by splicing a segment of coreless multimode fiber (NC-MMF) between two single-mode fibers (SMFs), shows a transmission peak at the output due to the inherent filter-like response of MMI. The wavelength shift of this peak can be used to detect adulterated milk. The sensor exhibits a linear response and high sensitivity, making it a potential tool for real-time monitoring in quality control of beverages.
Article
Engineering, Electrical & Electronic
V. Suresh Kumar, C. Krishnamoorthi
Summary: With the advancement of technology, wearable sensors play a significant role in medical monitoring, particularly in tracking vital signs. Understanding the basics of vital signs and various sensor technologies is crucial for designing suitable sensors, yet detailed information on this is lacking in existing literature.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Optics
Zeev Kalyuzhner, Sergey Agdarov, Aviya Bennett, Yafim Beiderman, Zeev Zalevsky
Summary: Speckle pattern analysis is applicable to remote sensing of various biomedical parameters, and analysis of micro-saccades movement using machine learning techniques offers a novel approach for non-contact assessment of human blood oxygen saturation level. Early detection of reduced blood oxygen saturation can save lives by preventing the rapid progression into pneumonia and death in cases of hypoxia.
