bluuebunny/crossref_metadata_2025 huggingface dataset:
Over 1 km Large Strain Measurement with 70+ Times Range Expansion by using Phase-Noise Compensated OFDR
Authors: Tanimura Daiki , Ogu Ryota , Zhang Chao , Ito Fumihiko , Yoshimura Yuichi , Aoshika Hiroyuki , Imai Michio
Published: February 2024

Over 1 km large strain measurement is demonstrated with a spatial resolution of 10 cm, by using phase noise compensated OFDR which expands the measurement range to over 70 times of that of conventional OFDR.
Multi-Resolution Integration Method for High Resolution Non-Uniform Distributed Strain Measurement in OFDR System
Authors: Chang Yanming , Liu Qingwen , Li He , Chen Jiahao , Chen Binglin , He Zuyuan
Published: February 2024

A Multi-Resolution Integration Method for the demodulation of non-uniform strain is proposed, which can solve the low correlation issues associated with non-uniform strain distribution in small-bandwidth optical reflectometries.
OFS-based construction management of civil engineering structures
Authors: Imai Michio
Published: February 2024

As a result of the development of new distributed optical fiber strain sensor technology based on Rayleigh scattering, significant improvement in measurement performance has been recently achieved. In this paper, it is reported that major changes have occurred in sensing for civil engineering structures, focusing on cases in construction management. Structural monitoring by optical fiber sensor can contribute to safe and high-quality construction management for tunnels, bridges and so on. Furthermore, the sensor can be later used for long-term monitoring, during maintenance periods through the long lifetime. What is seen here is not the continuous performance improvement such as higher spatial resolution and accuracy, but the discontinuous change given to civil engineering field.
Shaping the future of Image Guided Therapy
Authors: Marcelis Bout
Published: February 2024

This paper reviews the basics behind FORS technology and its use in Philips medical devices. Results from technical and preclinical studies will be summarized and insights from clinical studies will be discussed.
Membrane-on-Fiber Technology for Fiber Sensing
Authors: Fiore A. , Hendriks A.L. , Cano-Velázquez M.S.
Published: February 2024

We report a simple and reproducible method to transfer semiconductor membranes on the top of single- and multi-mode fibers, enabling a variety of temperature, refractive index and optomechanical sensors. We also describe a novel readout approach based on integrated multispectral chips.
Sensitivity Enhancement of Fiber-optic Hydrogen Sensor With Hydrogen-doped Pt/WO3 Coated on FBG
Authors: Wang Chaoqin , Han Zewen , Wang Chenxiang , Rao Yun-Jiang , Gong Yuan
Published: February 2024

We develop a novel fiber-optic hydrogen sensor with 171-fold improvement in sensitivity by hydrogen doping of the nano Pt/WO3 material and with a response time of 40 s.
Seeing the Wavefront of Ultrasound for Photoacoustic Sensing and Imaging
Authors: Lee Byeong Ha , Yoon Taeil , Kim Younggue , Awais Muhammad
Published: February 2024

The wavefront of propagating photoacoustic wave is optically captured with a non-contact manner. By implementing a full-field all-optic system equipped with two pulsed lasers, the volumetric photoacoustic imaging could be possible in a page-by-page manner.
In vivo B-mode endoscopic ultrasound imaging based on fiber optic acoustic detection
Authors: Zhang Qi , Wu Chaoneng , Liang Yizhi , Jin Long , Guan Bai-Ou
Published: February 2024

We present all-optical endoscopic ultrasound for in vivo, rotational-scanning (B-mode) imaging with an operating frequency of 20 MHz, an imaging depth of 2 cm, and a frame rate of 1 Hz.
Lab on fiber: a key enabling technology for precision medicine
Authors: Ricciardi A. , Pisco M. , Aliberti A. , Consales M. , Cusano A.
Published: February 2024

The paper provides an overall picture of the technological roadmap aimed to develop Lab on fiber (LOF) assisted needles for in-vivo liquid and tissue biopsy and to support light assisted localized therapies for precision medicine.
Accurate Measurement of Fiber Length and Effective Index using New Differential Pulse Loop Methods
Authors: Wang Yuhang , Chen George Y. , Wang Yiping
Published: February 2024

The position accuracy of distributed fiber-optic sensors is hugely important. We propose new fiber length measurement methods based on pulse recirculation. Relative error of the order of 1:107 can be obtained (26 MS/s sampling rate).
Highly sensitive temperature sensor via activation of high-order radial mode of forward stimulated Brillouin scattering in 80 μm thin-core fibers
Authors: Wang Han , Li Yichun , Wei Zizhou , Shou Haozhe , Zhu Mengshi , Wei Heming , Pang Fufei , Wang Tingyun , Zhang Liang
Published: February 2024

We demonstrated a high-sensitivity temperature sensor based on guided acoustic radial modes of forward stimulated Brillouin scattering in thin-core fibers, allowing the enhanced sensitivity linearly dependent on the order of activated radial modes.
Fibre-Air-Fibre Sensing Structure for Ice Detection
Authors: Lu Huanlang , Zhu Pingyu , Yao Yunshuai , Cheng Jianming , Zhang Qingfa , Soto Marcelo A.
Published: February 2024

A fibre-air-fibre structure made of single-mode optical fibres and glass fibre-reinforced plastics is proposed for ice detection. Monitoring power transmission changes, the sensor allows temperature-independent detection of ice formation in very early stages.
Coarse search for analysis area in neural network–assisted Brillouin gain spectrum–based strain measurement
Authors: Naruse Hiroshi , Kurokawa Takaya , Nakagawa Motoki , Narieda Shusuke
Published: February 2024

We propose a method for the coarse search of an analysis area for neural network– assisted strain measurement based on the observed Brillouin gain spectra and present numerical simulations demonstrating its availability for nonuniform strain measurement.
U-Shaped Plasmonic Fiber Sensor for Measuring Glyphosate in Water
Authors: Bombardi F. M. L. , Muller M. , Fabris J. L.
Published: February 2024

A U-shaped fiber sensor coated with a film of cysteamine-encapsulated gold nanoparticles was developed for sensing Glyphosate in water below the limit established by the Brazilian standards for drinking water of 500 μ/L.
2-D Phase Unwrapping in DAS with Transport of Intensity Equation
Authors: Sun Jianhui , Wang Yuyao , Zhang Jialei , Liang Yongxin , Zhang Gulan , Wan Anchi , Zhang Shibo , Ye Zhenyu , Zhou Yinze , Jing Qiang , Rao Yunjiang , Wang Hua , Wang Zinan
Published: February 2024

We introduce a 2-D phase unwrapping algorithm to DAS, surpassing dynamic range limits of conventional methods. Considering inter-trace phases, it enhances unwrap ability, mitigating stripe error caused by low SNR.
Brillouin Optical Time Domain Analysis with Phase-Modulated Probe and Time-of-Flight Servo Loop
Authors: Ru Mengying , Chen Jiageng , Huang Linjing , Li Hanzhao , Fan Xinyu , He Zuyuan
Published: February 2024

We propose a BOTDA scheme with phase-modulated probe light and time-of- flight servo loop. For a 25-km fiber under test, a resolution of ±0.3MHz and a measurement range of 75 MHz and 0.25 seconds per measurement are achieved.
Compensation of Laser Phase Noise in Coded Distributed Acoustic Sensing
Authors: Piñeiro Enrique , Sagues Mikel , Loayssa Alayn
Published: February 2024

We demonstrate, for the first time to our knowledge, a technique for the com- pensation of phase noise effects in coded pulse compression DAS and compare its perfor- mance to systems using frequency-modulated pulse compression.
Optical Fiber Lspr Sensor Employing Graphene Oxide Nanocomposite for Arsenic Detection
Authors: Banoo Fatima , Khijwania Sunil K.
Published: February 2024

Highly sensitive and selective U-shaped optical fiber probe with AuNPs and Al2O3/GO coating is proposed for arsenic detection. It has LOD of 0.11ppb, linear response of 0-20ppb, offering accurate, cost-effective solution for monitoring water quality.
High-speed Train Operation Monitoring based on DAS Spatial-temporal Sequence Visualization
Authors: Xie Lang , Wu Mingsong , Bai Jingcheng , Li Zhaojie , Rao Yunjiang , Wu Yu
Published: February 2024

A real-time high-speed train operation monitoring system based on DAS, utilizing wavelet packet denoising and imaging enhancement methods to achieve precise information extraction of train traces, is demonstrated with a positioning accuracy of ~10m.
Comprehensive evaluation of spatial resolution in Brillouin optical correlation-domain reflectometry
Authors: Noda Kohei , Lee Heeyoung , Yamashita Shinji , Nakamura Kentaro , Mizuno Yosuke
Published: February 2024

We investigates the strain dependence of the spatial resolution in Brillouin Optical Correlation Domain Reflectometry (BOCDR) and its ability to measure smooth continuous strain distributions. We derive a spatial resolution formula including strain dependency from simulation results. Additionally, we explore the limitations of measuring smooth strain distributions, finding that rapid strain changes lead to discontinuous in measured strain distribution. The parameter of the beat spectrum's sidelobe imposes a constraint on the maximum measurable slope of the strain distribution.
Detection of Airborne Ultrasound through Modulation of Refractive Index of Air using Sagnac Interferometer
Authors: Zijian Wang , Nakamura Kentaro
Published: February 2024

We present a trial to detect airborne ultrasound through the modulation of the refractive index of air with the use of a Sagnac interferometer. Theoretical considerations and experimental demonstrations are presented.
Research on Suppression of Temperature Effect of 260 m Polarization Multiplexing Fiber Interferometer
Authors: Wang Yuanjun , Wen Kunhua , Ping Xinyang , Fang Hui , Sun Jiangquan , Wang Huajuan , Xu Pengbai , Yu Zhangjun , Yang Jun , Wang Yuncai , Qin Yuwen
Published: February 2024

A 260 m polarization multiplexing fiber interferometer with disc-type vibration pickup structure was built for acceleration sensing. The response coefficient was corrected to reduce the impact of temperature fluctuations by 207 times and suppress cross-interference.
The design and application of a broadband edge filter based on a helical long-period fiber grating written in a graded-index few-mode fiber
Authors: Wang Peng , Gao Kaiyue , Zhang Heng , Chen Yu , Huang Xinyue , Zhao Ting , Yan Senlin , Hao Hui , Zhao Hua
Published: February 2024

A broadband edge filter with linear dynamic ranges of 78.1 nm in wavelength and 91.54% in transmission loss has been demonstrated both theoretically and experimentally, which is achieved by using a helical long period fiber grating written in a graded-index few-mode fiber (GI-FMF-HLPG). As a typical application example of the proposed edge filter, a power-interrogated sensor was successfully proved. Benefited from the ultra-low value of group dispersion difference between the coupled modes in the graded-index few-mode fiber, the sensor not only achieves characteristics of ultra-wide linear dynamic ranges, but also has ultra-high sensing sensitivity. The maximum torsion sensitivity is 0.501 nm/(rad/m) under the torsion ranging from −22.4 to 22.4 rad/m and the maximum strain sensitivity is −4.05 pm/µε under the strain ranging from 0 to 2000 µε, which are much higher than those of conventional fiber-based sensors.
Reflectometric configuration for plastic optical fiber Bragg grating-based real-time touch sensing
Authors: Javid Hamza , Noda Kohei , Watanabe Shunsuke , Lee Heeyoung , Nakamura Kentaro , Mizuno Yosuke
Published: February 2024

A single-end-access reflectometric configuration for touch sensing using a fiber Bragg grating (FBG) inscribed in a plastic optical fiber is implemented. We demonstrate real-time touch sensing capabilities, which are not achievable with silica FBGs.
Research on AWG-based demodulation of overlapping FBGs via a neural network
Authors: Yue Zizheng , Zheng Di
Published: February 2024

A high-performance demodulation method utilizing AWG and a neural network (NN) is proposed for overlapping FBGs. This method has been theoretically validated, demonstrating a wavelength interrogation precision with a MAE of less than 9 pm.
Gas Raman Sensors Based on Anti-resonant Hollow Core Fibers Using Metal Coated Capillaries and Their Applications in Leakage Detection of Electrolytes in Lithium-ion Batteries
Authors: Nie Qilu , Liu Zhixiong , Cheng Mengen , Yang Dexun , Yang Minghong , Guo Donglai
Published: February 2024

A Raman gas sensing system using a metal coated capillary (MCC) to improve the gas Raman reception efficiency is proposed, which can realize the detection of electrolyte leakage in lithium-ion batteries.
Novel two-photon 3D printed microcantilever-based optical fiber microphone
Authors: Liu Jing , He Huan , Chen Shuyan , Zhao Zhiyong , Tang Ming
Published: February 2024

A novel microcantilever-based optical fiber microphone fabricated with two-photon polymerization (TPP) technology is proposed. In the audible frequency range of humans (20 Hz - 20 kHz), the sensor realizes an SNR of over 50 dB.
Dual-comb ranging with dispersive Fourier transformation
Authors: Chang Bing , Tan Teng , He Xinyue , Du Junting , Liu Zihan , Li Bowen , Yao Baicheng
Published: February 2024

We demonstrate a dual-comb vernier ranging system based on in-fiber Dispersive Fourier transformation. An accuracy of 407 nm in single-shot with a maximum distance of 1.6 km and a 85 kHz framing speed are achieved.
Instantaneous microwave multi-frequency measurement system based on dual electro-optic frequency combs
Authors: Sun Peiyuan , Yuan Zhengchao , Fan Xinyu , He Zuyuan
Published: February 2024

We propose a microwave photonic instantaneous multi-frequency measurement system that utilizes dual electro-optic frequency combs (EOFC) for simultaneous measurement of multiple-frequency signals. The proposed system offers high measurement resolution and an ultra-wide frequency measurement range.
Hybrid Distributed Sensing System for Dynamic Strain and Temperature Measurement
Authors: Gautam Abhinav , Russell Conor , Antony Cleitus , Ibrahim Selwan , Townsend Paul
Published: February 2024

We propose a novel hybrid sensing scheme over a single optical cable using time-division-multiplexing of two interrogation technologies to perform distributed acoustic measurements over a frequency ranging 100Hz−1kHz and temperature measurements with uncertainty below 0.2°C.
Recent Advances in the Development of a Humidity-Insensitive Optical Fiber for Large-Scale Production
Authors: Neves Tiago , Tow Kenny Hey , Lindblom Magnus , Claesson Åsa , Santos Mariana , Soeiro Manuel
Published: February 2024

This paper presents a humidity-insensitive silicone coating compatible with draw tower production. It enables distributed humidity sensing since it can be used as reference fiber. Experimental findings demonstrate excellent humidity insensitivity (-20 to 45°C, 10-60%RH).
A 12,000-hour Investigation on the Brillouin Frequency Shift Behavior of a Silica Optical Fiber Exposed to High Temperatures
Authors: KUMAGAI Yoshihiro , TEZUKA Shin-ichiro , TOMOSADA Nobuhiro , SAITO Kazuya , KOREEDA Akitoshi
Published: February 2024

At high temperatures, the Brillouin frequency shift of a silica optical fiber drifts to low frequencies. This drift-down is due to changes in the physical properties of the glass caused by structural relaxation.
Optical fiber DNA biosensors based on multiple surface plasmon resonance
Authors: Li Xuegang , Gong Pengqi , Zhou Xue , Zhang Yanan , Lv Riqing , Nguyen Linh V. , Warren-Smith Stephen C. , Zhao Yong
Published: February 2024

The optical fiber surface plasmon resonance (SPR) technology applications on DNA hybridization detection significantly improve the sensitivity, detection limit, response time and cost. Based on our recent research around optical fiber SPR DNA detection, multiple fiber optic SPR DNA detection techniques and their application areas are described in this paper. According to the applied fields, SPR-based DNA detection methods proposed by our group can be classified as the high-sensitivity DNA detection method, the temperature-compensated DNA detection method and multi-parameter DNA detection methods. These studies are important for improving traditional DNA detection technology and expanding the application of SPR technology in the field of biosensing.
A DVS signal recognition method with high generalization based on FrFT
Authors: Ge Zhao , Zhao Can , Wu Hao , Tang Ming
Published: February 2024

We propose a DVS signal recognition method based on FrFT, which enhances the learning effectiveness of neural network by exploring more feature dimensions of the signal, achieving high recognition accuracy with good generalization ability.
Damage Monitoring using a Fiber-Optic Time-Differential Brillouin Optical Correlation Domain Analysis
Authors: Oh Se Geon , Kwon Yong-Seok , Seo Dae-Cheol , Jeon Min Yong , Kwon Il-Bum
Published: February 2024

We propose a method for damage monitoring through a simulated damage in a composite storage tank using a fiber optic time-differential Brillouin optical correlation domain analysis (TD-BOCDA) sensor.
Ultrasonic guided wave monitoring of composite structure: impact detection and localization with Fiber Bragg Grating sensors
Authors: Ribay Guillemette , Desmarchelier Rudy , Roussel Nicolas , Recoquillay Arnaud , Laffont Guillaume , d’Almeida Oscar
Published: February 2024

Fiber Bragg Grating sensors record the ultrasonic signature of impacts on aeronautic composite structures. Experiments with 4 FBG sensors show proper localization of impacts with around 1cm precision using an algorithm based on time of arrivals of guided waves.
Understanding the Link between Strain Transfer and Probability of Detection in Distributed Optical Fiber Sensors
Authors: Falcetelli Francesco , Yue Nan , Rossi Leonardo , Bolognini Gabriele , Bastianini Filippo , Zarouchas Dimitrios , Di Sante Raffaella
Published: February 2024

The research shows the link between the strain transfer properties of distributed optical fiber sensors and their probability of damage detection, which is crucial for a successful implementation in real structural health monitoring applications.
2 cm spatial resolution Brillouin optical time-domain analysis with <100 kHz detection bandwidth using time expansion
Authors: Youn Jae Hyeong , Song Kwang Yong , Martin-Lopez Sonia , Gonzalez-Herraez Miguel , Fernández-Ruiz María R.
Published: February 2024

Time-domain distributed Brillouin sensing with a spatial resolution of 2 cm and 12,000 resolving points is experimentally demonstrated through a time expansion scheme. Two combs with different line spacing serve as the probe and pump, respectively, and the acoustic phonon information generated by their spectral beating is down-converted to a detection bandwidth of less than 100 kHz. © 2023 Jae Hyeong Youn, Kwang Yong Song, Sonia Martin-Lopez, Miguel Gonzalez-Herraez, and Maria R. Fernandez-Ruiz
Interference Fading Free φ-OTDR Using Polarization Multiplexing LFM Signals with MIMO in Fractional Fourier Domain
Authors: Wang Li , Wang Jingchuan , Yu Changyuan , Cheng Zhi , Yan Yaxi , He Huan , Tang Ming
Published: February 2024

Characterized by compression of polarization multiplexing LFM signals using MIMO in fractional domain, the interference-fading-free φ-OTDR is experimentally validated. The sweep bandwidths of LFM signals for orthogonal polarizations completely overlap, resulting in ultrahigh spectrum efficiency.
Ethanol Detection Using a Swelling POF Alcohol Sensor with a Protective Polymer Layer
Authors: Amano Tatsuki , Suzuki Yutaka , Morisawa Masayuki
Published: February 2024

We have developed a plastic optical fiber (POF) sensor using novolac resin, which swells in alcohol, as the cladding material. In this study, we added a polystyrene layer between the POF core and cladding. This layer was designed to prevent alcohol adsorption into the polymethyl methacrylate core. Consequently, we developed a POF sensor capable of selective and repetitive ethanol detection.
A High Sensitivity, Fast Response Optical Fiber Gas Sensor using Micro-drilled Anti-Resonant Fiber
Authors: Warrington Eleanor A. , Peverall Robert , Salter Patrick S. , Hancock Gus , Booth Martin J. , Ritchie Grant A. D. , Fells Julian A. J.
Published: February 2024

Remote gas detection is often a compromise between high sensitivity and response time. Micro-drilled anti-resonant fiber is used for 0.3% acetylene detection to simultaneously achieve both of these characteristics.
Machine learning for strain, temperature and humidity discrimination in Brillouin optical frequency domain analysis
Authors: Karapanagiotis Christos , Krebber Katerina
Published: February 2024

We propose to our knowledge for the first time an ensemble of probabilistic machine learning models for strain, temperature and humidity discrimination in Brillouin optical frequency domain analysis (BOFDA) applying a two-fiber configuration.
8 mm spatial resolution DPP-BOTDA based on dispersion compensation fiber
Authors: Xu Pengbai , Peng Yihao , Wen Kunhua , Dong Xinyong , Yang Jun , Qin Yuwen
Published: February 2024

We demonstrated an 8 mm spatial resolution DPP-BOTDA sensor based on differential pulse-pair and dispersion compensation fiber, whose Brillouin gain coefficient is one order of magnitude higher than that of standard single-mode fiber.
Ultra-high Spatial and Strain Resolution 3D Shape Sensing Based on Twice-differential φ-OFDR System
Authors: Lv Yuejuan , Li Hao , Ai Ke , Yan Zhijun , Sun Qizhen
Published: February 2024

By employing with twice-differential φ-OFDR system, the 3D shape is precisely reconstructed with the spatial resolution of 20μm, the strain resolution of 0.1με and maximum reconstruction error of 1.187% over a length of 200mm.
Spatially resolved magnetic field measurement using polarization-sensitive reflectometry-based spun optical fibre sensor
Authors: Dandu Prasad , Gusarov Andrei , Van Esbeen Bastien , Wuilpart Marc
Published: February 2024

We present a polarization-sensitive reflectometry-based technique for distributed magnetic field measurement using a single polarization axis analysis in spun fibres. Sub-cm range spatial resolution was achieved with the technique when tested with an MRI scanner.
Testing of Four Channel Stokes Polarimeter for intrusion detection in Quantum Key Distribution systems
Authors: Pawlikowska Estera , Życzkowski Marek , Pakuła Anna , Marć Paweł
Published: February 2024

We present the implementation of the Four-Channel Stokes Polarimeter for continuous monitoring of the state of polarization of light in QKD system, to detect disturbance of the fiber link integrity in the single photon regime.
High Performance Miniaturized DAS-based hydrophone (HyDAS) with Spatial Deviation Method for Ship Detection
Authors: Liu Yifan , Yang Junqi , Wang Zhaoyong , Wu Bingyan , Shuai Luwei , Ye Lei , Ying Kang , Gao Kan , Qu Ronghui , Cai Haiwen , Ye Qing
Published: February 2024

Spatial deviation method is proposed and the miniaturized HyDAS is designed, with -69dB noise floor, 90.77dB dynamic range and 0.14Hz~5kHz frequency response. In field test, the small ship detection is first realized with communication cable.
Research on the measurement method of photoacoustic cell resonance characteristics based on chirp modulation
Authors: Meng Ziqiang , Zhang Jialong , Li Wei , Xiang Jing , Wan Yukun
Published: February 2024

This paper presents a fast method to measure the frequency response of photoacoustic cell and can be used as a method to measure the gas concentration of photoacoustic spectrum without frequency response measurement.
Multifunctional Mattress-type Physiological Monitoring System with All-fiber Structure
Authors: Jin Hanyu , Wen Jianfeng , Chen Zhuolin , Li Hao , Shen Kai , Liu Yunfei , Xiao Kai , Yan Zhijun , Sun Qizhen
Published: February 2024

A multifunctional mattress-type all-fiber physiological signal monitoring system is proposed and demonstrated, which can realize the continuous monitoring of human respiration, heartbeat and body movements.
Temperature Measurement in the Nuclear Reactor Core Using Distributed Optical Sensing
Authors: Dejdar Petr , Foral Štěpán , Munster Petr , Carboch David , Ševeček Martin
Published: February 2024

The paper deals with distributed temperature measurements in the core of nuclear reactor. A probe was designed using an ordinary telecommunication optical fiber that can be added to the reactor core without disassembling the core.
Fiber-Optic-based Airworthiness Assessment of High-Altitude Inflatable Aerostat Struct
Authors: Kressel Iddo , Ben-Simon Uri , Goldstein Nadav , Ofir Yoav , Shoham Shay , Gur-Arieh Gil , Perets Ariel , Dvorjetski Ariel , Tur Moshe
Published: February 2024

Airworthiness assessment of a high-altitude, fabric-made, inflatable aerostat structure is monitored from the ground via multiplexed fiber Bragg sensors, bonded to the structure fabric. Payload loading/unloading, stresses induced by strong winds and other effects are easily detected.
Novel Fiber Optic Accelerometer
Authors: Diachenko Radomyr , Lee Kwanil
Published: February 2024

We propose a high-precision fiber optic accelerometer using pulse modulation of optical flow intensity, which can theoretically reach a threshold sensitivity better than 10-9 m/s2 for acceleration near g and 10-12 m/s2 for ultralow acceleration.
Single-End Vibration Sensing Based on Inter-Modal Interference Using Two-Mode Region of Single-Mode Fibers
Authors: Nakamura Atsushi , Manabe Tetsuya , Koshikiya Yusuke
Published: February 2024

We propose a vibration sensing method based on inter-modal interferometry. Based on Fresnel reflection, the method enables us to detect the vibration frequency from just one end of a telecom fiber.
Fiber optofluidic laser-based ionic liquid pH sensor
Authors: Zhang Yuanxian , Pu Xiaoyun , Li Dongyang , Meng Weidong
Published: February 2024

We present a dual-sensing strategy for pH sensors in which lasing emission wavelength and emission intensity strongly depend on the ionic liquid's pH value.
Ultrahigh-sensitive fiber optic acetone gas sensor with Vernier effect based on parallel FPIs
Authors: Liu Yingxuan , Zhao Yong , Lin Zi-ting , Hu Xu-guang
Published: February 2024

An ultrahigh-sensitive acetone gas sensor based on the Vernier effect is proposed. The sensitivity of the sensor to acetone reaches 26.91 pm/ppm, which is about 15.38 times more sensitive than that of a single FPI.
A Novel Method to Decouple Temperature and Strain Using a Customized Femtosecond Laser-inscribed Superstructure Fiber Bragg Grating
Authors: Sanipatin Bryan , Maldonado-Hurtado Daniel , Madrigal Javier , Barrera David , Sales Salvador
Published: February 2024

This paper introduces a novel technique to simultaneously measure temperature and strain using a single 5 mm femtosecond laser-inscribed superstructure FBG. Analyzing resonance distances, it allows distinguishing and complements the contributions of strain and temperature, improving measurements in sensing applications.
Interference Fading Elimination by Combination of Rotate Vector Sum and Intensity Tracking Techniques in Coherent Φ-OTDR
Authors: Qiu Ying , Cheng Yafeng , Wang Hanyong , Li Desheng , Zhang Yixin , Luo Ming , Li Xiang , Huang Tianye , Zhang Xu , Xiao Xi
Published: February 2024

A method combined with rotate vector sum and intensity tracking algorithm was proposed to eliminate the interference fading in coherent Φ-OTDR. The experimental results shows that the proposed method can effectively locate the vibration position with mitigated interference fading.
Optical fiber ITO-LMR sensing based on electrochemical modulation
Authors: Dai Xiaoshuang , Tan Ke , Wang Shuang , Liu Hongyu , Li Zhiyuan , Jiang Junfeng , Liu Tiegen
Published: February 2024

Indium tin oxide (In2O3-SnO2-90/10 wt%, ITO) coated optical fiber was used as the working electrode of a three-electrode system to achieve wavelength modulation based on lossy mode resonance (LMR) by cyclic voltammetry (CV) method.
Reduction of Temperature Drift in Refractive-index-sensing Optical Frequency Comb by Active-dummy Compensation
Authors: Higaki Msayuki , Miyamura Shogo , Taue Shuji , Tokizane Yu , Minamikawa Takeo , Yasui Takeshi
Published: February 2024

We suppress the temperature drift in the refractive-index-sensing optical frequency comb (RI-sensing OFC) by taking the difference of repetition frequency between an active RI-sensing OFC and a dummy one in the mechanical-sharing dual-fiber-cavity configuration.
Vibration Recognition Based on MTF-NMF Images in Fence Security Monitoring with Φ-OTDR
Authors: Huang Yi , Dai Jingyi , Shen Wei , Hu Chengyong , Pang Fufei , Zhang Xiaobei , Wang Tingyun
Published: February 2024

A vibration recognition method based on MTF-NMF images for Φ-OTDR is proposed, which has higher training speed and better recognition performance, compared to 1-D CNN with phase time series and 2-D CNN with MTF images.
High Accuracy Distributed Birefringence Measurement of Polarization Maintaining Fiber Based on OFDR
Authors: Xie Dongcheng , Zhang Xiang , Lin Yicheng , Lin Cuofu , Yang Jun , Wang Yuncai , Qin Yuwen
Published: February 2024

We suggest a distributed birefringence measurement method for Polarization-maintaining fiber using Optical Frequency Domain Reflectometry. Method provides a spatial resolution of 5 cm and an uncertainty of 6.8×10-7 at a test distance of 2257 m.
Scalable and Cost-Effective All-Chemical Production of Stable Gold-Coated Silver Thin-Films for High-Performance Plasmonic Optical Fiber Sensors
Authors: dos Santos Paulo S. S. , Mendes João P. , Pastoriza-Santos I. , de Almeida José M.M. M. , Coelho Luís C. C.
Published: February 2024

Long-term stability and high scalability are significant issues in plasmonic optical fiber sensors. This work presents a highly scalable and low-cost all-chemical approach for production of gold-coated silver thin-films, ensuring high performance and chemical stability.
A generalized grating equation for two-cascaded virtually imaged phased array based on plane-wave theory
Authors: Long Ziwen , Fan Xinyu , He Zuyuan
Published: February 2024

In this study, we derive a grating equation for the two-cascaded virtually imaged phased array (VIPA), which provides valuable insights for the design and construction of spectrometers and other devices utilizing the two-cascaded VIPA structure.
Fiber Optic pH Sensor Based on Long-Period Fiber Grating coated with Polyethylenimine/Polyacrylic acid Layer-by-Layer Electrostatic Self-Assembled Nanofilm
Authors: da S. A. Pereira José M. , Mendes João P. , de Almeida José M. M. M. , Coelho Luís C. C.
Published: February 2024

An optical fiber pH sensor based on a long-period fiber grating was produced by coating the sensing region with two bilayers of polyethylenimine (PEI) and polyacrylic acid (PAA) using the layer-by-layer self-assembly technique. © 2023 José M. da S. A. Pereira, João P. Mendes, José M. M. de Almeida and Luís C. C. Coelho
Novel Fibre Bragg Sensors to Quantify Pressure Transients in Pumping Stations
Authors: Fabian Mattias , Scott Richard , Bandyopadhyay Sankhyabrata , Sun Tong , Grattan Kenneth T.V. , Bustamante Heriberto , Turner Michael , Coiro Enrico , Llave Raymond , Win Mason , Hearfield Jeremy
Published: February 2024

This paper reports the success of the joint research between Sydney Water and City, University of London to develop and implement innovative fibre-optic sensors to monitor the effect of water hammer on pump station infrastructure.
A Novel Machine Learning-Based Framework for Human Vital Sleep Assessment with Optical Fiber Interferometer
Authors: Wang Qing , Lyu Weimin , Zhou Jing , Yu Changyuan
Published: February 2024

Optical fiber sensor with fiber interferometer can obtain human vital signs signal more effectively and accurately. A novel machine learning model (PSVM) is proposed to monitor human sleep conditions better with the optical fiber sensor.
Non-contact Short-term HRV Analysis of Patients with Premature Beats Based on a Fiber Optic Sensor
Authors: Lyu Weimin , Chen Shuyang , Yuan Weihao , Li Yujian , Wang Qing , Yu Changyuan
Published: February 2024

This paper proposes a low-cost FOS-based BCG monitoring system for short-term HRV analysis of patients with premature beats. The time domain and frequency domain analysis results of BCG HRV and ECG HRV are highly correlated.
Measuring Dynamic Behavior and Damage Evolution of a Reinforced Concrete Wall Subjected to Explosive Blasts using Embedded Distributed Fiber Optic Sensors
Authors: Hicke Konstantin , Chruscicki Sebastian , Breithaupt Mathias , Costard René , Kind Thomas , Hüsken Götz , Agasty Amit
Published: February 2024

Results from highly dynamic and static strain measurements, respectively, using embedded distributed fiber optic sensors in a steel-reinforced concrete wall under explosive blast-loading are presented, detailing the structure’s dynamic behavior and the evolutions of cracks.
Photoacoustic Fiberscope for Cerebral Oxygenation Imaging Based on Optical Ultrasound Detection
Authors: Guan Bai-Ou , Jin Long , Liang Yizhi
Published: February 2024

We developed photoacoustic fiberscopes based on optical ultrasound sensors. This new imaging modality was used for cerebral oxygenation imaging on freely moving mice for neuroscience study and the detection of brain injuries in intensive-care medicine.
Stability Enhancement of Counter-Propagating All-Normal Dispersion (CANDi) Fiber Laser via Pump Noise Suppression
Authors: Li Peize , Du Junting , Yao Baicheng , Rao Yunjiang , Li Bowen
Published: February 2024

The stability of counter-propagating all-normal dispersion (CANDi) fiber laser (an emerging high-energy single-cavity dual-comb laser modality) has been enhanced effectively through active pump intensity noise suppression, which would significantly benefit various dual-comb metrology applications.
Actively-optical-assisted soliton microcomb
Authors: Tan Teng , Zhang Hao , Liang Yupei , Chen Haojing , Tang Fan , Xiao Yunfeng , Rao Yunjiang , Yao Baicheng
Published: February 2024

We proposed a novel concept called actively-optical-assisted soliton microcomb and realized remarkable enhancement of soliton performance with such an amplifier-free microcomb device, serving next generation of high-performance optical fiber sensors. © 2023 The Author(s)
Approaching distributed ground motion sensing at high and low frequency ranges
Authors: Lu Xin , Hicke Konstantin , Krebber Katerina
Published: February 2024

The phase and reflection spectrum of a standard distributed acoustic sensor based on an interferometer are used for fast and slow dynamic measurements, respectively, enabling the system to simultaneously measure various types of ground movement.
Long Range Distributed Acoustic Sensor with Phase Noise Compensation
Authors: Xiao Zhengyuan , Chen Jiageng , Ji Jiazhen , Li Hanzhao , Deng Yuanpeng , Liu Qingwen , He Zuyuan
Published: February 2024

By employing an auxiliary interferometer together with a two-step compensation algorithm, phase noise compensation is performed in a long range distributed acoustic sensor to mitigate impact of the phase noise on coherent detection.
A Lossless Data Compression Method for Distributed Acoustic Sensors
Authors: Wu Chengjun , Chen Jiageng , Yan Gaocheng , He Zuyuan
Published: February 2024

We propose a lossless data compression method for optical fiber distributed acoustic sensors. Storage space reduction is evaluated to be more than 50% with typical measurement results.
Millimeter Spatial Resolution OFDR Based on Double 2nd-order Sideband Modulation
Authors: Chang Yanming , Liu Qingwen , Li He , Luo Yimin , Chen Jiahao , He Zuyuan
Published: February 2024

Double second-order sideband with suppressed carrier modulation technology is developed for OFDR system. With an equivalent frequency sweeping range of 80GHz, spatial resolution of 1.083mm over 2km fiber is realized without any optical filters.
Fast Quasi Distributed Acoustic Sensing via Phase Generated Carrier
Authors: Dadush Yossi , Arbel Nadav , Tur Moshe , Eyal Avishay
Published: February 2024

Ultra-fast interrogation is used for implementing a quasi-distributed acoustic sensing system. A simple direct detection receiver and the Phase Generated Carrier technique are employed to extract the acoustically induced high-frequency phase signals.
Hybrid Nonlinear Preamplification for φ-OTDR Distributed Acoustic Sensing
Authors: Rossi L. , Cheng L. K. , De Jong W. , Jansen R. , Bolognini G.
Published: February 2024

A linear-nonlinear preamplification system for φ-OTDR distributed acoustic sensors to counteract signal fading is compared with linear preamplification, showing an improvement in minimum and average intensity of 160% and 73% compared to the maximum.
Distributed Acoustic Sensor based on Coherent Detection with Low Detection Bandwidth and Reduced Fading
Authors: Sasikumar Neethu , V P Anand , V R Ranjith , Venkitesh Deepa , Srinivasan Balaji
Published: February 2024

This article discusses a Distributed Acoustic Sensing (DAS) configuration based on coherent detection to detect acoustics using low bandwidth receivers at a reduced sampling rate of 100 Msps in baseband with inherent offset correction and low fading.
Analytical model on the sensitivity in heterodyne-detection phase-sensitive optical time-domain reflectometry
Authors: Zhang Qian , Yang Zhisheng , Hong Xiaobin , Wu Jian
Published: February 2024

An analytical model linking the sensitivity and system parameters for heterodyne-detection phase-sensitive optical time-domain reflectometry is proposed and experimentally validated, enabling highly efficient system design and the optimization of system parameters.
Comparison of Sensor Designs for Detection of Codeine: Using Molecularly Imprinted Polymer-Optical Fibre Sensors
Authors: Whittaker Nancy S. , Nguyen T. Hien , Rente Bruno , Fabian Matthias , Sun Tong , Grattan Kenneth T.V. , Khan Kate , Parker Alex , Holt Alan
Published: February 2024

A comparative analysis of surface plasmon resonance and fluorescence detection methods employing molecularly imprinted polymers revealed their distinct capabilities in codeine detection, offering valuable insights for diverse applications requiring sensitive and specific drug analysis.
Beyond Communication: Telecom Fiber Networks for Rain Detection and Classification
Authors: Shi Sai , Ding Yangmin , Tian Yue , Jiang Zhuocheng , Ozharar Sarper , Wang Ting , Moore James M.
Published: February 2024

We present the field trial of an innovative neural network and DAS-based technique, employing a pre-trained CNN fine-tuning strategy for effective rain detection and classification within two practical scenarios.
On the Efficacy of Using Commodity Optical Transceivers for Environmental Sensing
Authors: Catudal Joe , Dowsett Keith , Barford Paul , Fratta Dante , Jensen Bill , Lord Neal , Wang Herb
Published: February 2024

We report results of an experimental study that assesses the efficacy of using a commodity optical transceiver for environmental sensing applications. We identify the effective sensing capability, limited by sampling rate and ambient noise.
Enhancing Perimeter Protection using Φ-OTDR and CNN for Event Classification
Authors: Tomasov Adrian , Zaviska Pavel , Spurny Vladimir , Dejdar Petr , Munster Petr , Horvath Tomas , Klicnik Ondrej
Published: February 2024

The paper introduces an enhanced method combining Φ-OTDR and CNNs for an accurate object classification for perimeter protection. The proposed approach achieves an accuracy of 91% of common events in the optical fiber vicinity.
Distributed Detection of Cable Joint Insulation Defects using Dual-Frequency Heterodyne Coherent φ-OTDR
Authors: Qin Weiqi , Wang Sihan , Wang Yukun , Wang Wei , Wang Yuan , Ma Guoming
Published: February 2024

A φ-OTDR system adopting dual-frequency heterodyne coherent detection scheme was presented to sense partial discharge acoustic emission signals in power cable joints. Partial discharges with a magnitude of 127 pC was detected within 20 km.
Interrogation of Fiber Bragg Gratings employing a tunable VCSEL laser and Optical Frequency Domain Reflectometry
Authors: Cano-Vásquez C. Camilo , Triana Andrés , Varón-Durán Margarita
Published: February 2024

This paper presents an interrogation setup for FBG sensors utilizing a wide-wavelength scanning range VCSEL and Optical Frequency Domain Interferometry. We obtained the raw interferograms for conventional and codified sensors, with temperature variations between 20°C-50°C.
Depolarized FOG with Birefringent Modulation and Its Application in Rotational Seismic Observation
Authors: Li Shuai , Yang Yuanhong , Wang Rumo
Published: February 2024

The spectral modulation in a depolarized Sagnac interferometer assemble was eliminated by applying a birefringent modulation approach. A low noise high sensitivity depolarized FOG was developed and successfully applied in rotational seismic observation.
Optimization of ultra-long random fiber lasing sensor
Authors: Ran Zherui , Dong Shisheng , Liu Yang , Rao Yunjiang , Han Bing
Published: February 2024

Optimization of ultra-long random fiber lasing sensor (RFLS) is realized by optimizing the location and length of erbium-doped fiber theoretically and experimentally, resulting in a record-long (230km) single-ended RFLS with a high optical signal-to-noise ratio.
Optical Fiber Gas Pressure Sensor Based on the Michelson Interferometer with Optical Vernier Effect
Authors: LI Yujian , LYU Weimin , LIU Zhengyong , Yuan Weihao , YU Changyuan
Published: February 2024

By detecting the gas pressure-caused air refringence change of the holes in the fiber, an ultra-sensitive gas pressure sensor is built up based on the Michelson interferometer with the Optical Vernier effect.
Performance of Hydrogen Sensors Based on Pd/Hf Composite Film and π-phase-shift Grating
Authors: Zhang Fan , Ao Wenxin , Hu Wenbin , Xue Bingyang , Buchfellner Fabian , Bian Qiang , Roths Johannes , Yang Minghong
Published: February 2024

Hydrogen sensors with Pd/Hf film on π-phase-shift grating were proposed. The performance experiments showed that the wavelength shift under 1% hydrogen concentration was 30 and 79 pm for 200 and 500 nm coating thickness, respectively.
Ultra-sensitive gas detection based on graphene microcomb
Authors: Liang Yupei , An Ning , Tan Teng , Tang Fan , Rao Yunjiang , Yao Baicheng
Published: February 2024

Leveraging the sub-comb merging effect, we realized a microcomb-based gas sensor in a graphene-functionalized microcavity. The sub-comb heterodyne measurement enables ultra-sensitive gas detection of down to 4 ppb level.
Proposal of Second Harmonic Detection Method in Brillouin Optical Correlation Domain Reflectometry
Authors: SUZUKI Yuta , HONMA Masayoshi , TEZUKA Shin-ichiro
Published: February 2024

We propose a second harmonic detection method for BOCDR, a distributed optical fiber sensor. This method improves the stability of long-term measurements and the measurement accuracy of Brillouin frequency shifts.
Processing strain data generated from distributed acoustic sensing for monitoring tasks
Authors: Matthaiou Ioannis , Masoudi Ali , Brambilla Gilberto
Published: February 2024

Signal and image analysis methods for data from distributed acoustic sensing measurements are presented. These techniques improved monitoring capability, by enhancing signal quality and providing a robust and accurate detection of significant events.
Waveguide Bragg Grating based Breath Sensing Chip
Authors: Cai Heyi , Xiao Xiangpeng , Dai Yuze , Song Qingguo , Dai Chenhao , Huang Fanglei , sun Qizhen , Yan Zhijun
Published: February 2024

A novel breath sensing chip based on waveguide Bragg grating (WBG) cascaded with a side-polished waveguide (SPW) was proposed and demonstrated. Both temperature and humidity can be monitored simultaneously during human breathing.
Improvement of Multiplexing Capability of Fiber Bragg Gratings Using Convolutional Neural Network
Authors: Yamaguchi Tatsuya , Kawashima Hiroto , Matsuda Hiroki , Shinoda Yukitaka
Published: February 2024

A method for improving the multiplexing capability of fiber Bragg gratings (FBGs) based on wavelength division multiplexing by a convolutional neural network (CNN) is developed. Using the devised CNN model, the direct analysis of the peak wavelengths of the arbitrary strain responses of four overlapping FBGs at the same wavelength without the support of special optical devices is demonstrated for the first time. The standard deviation of the measurement resolution is < 2.8 pm.
Error Evaluation of Slope-Assisted BOTDA based on Virtually Synthesized Brillouin Gain Spectrum
Authors: Sei Daichi , Nonogaki Hayato , Zan Mohd Saiful Dzulkefly Bin , TANAKA Yosuke
Published: February 2024

We demonstrate that slope-assisted (SA) BOTDA using virtually synthesized spectrum composed both of Brillouin gain and loss has smaller error than standard SA-BOTDA using single Brillouin gain spectrum.
Energy Harvesting from Fiber Bragg Grating-Based Sensors
Authors: Marin Juan M. , Rjeb Alaaeddine , Ashry Islam , Ng Tien Khee , Ooi Boon S.
Published: February 2024

This work introduces a novel FBG-based system that utilizes FBG’s reflected light for temperature sensing and harvests 4.33-mW from the transmitted light that is otherwise wasted. This enables efficient power management and precise temperature measurements.
3D Printed Culture Plate with Embedded FBG Sensors for Temperature Monitoring in Hyperthermia Studies
Authors: Ospina-Mendivelso Nicolas , Triana Andrés , Cano C. Camilo , Guarnizo Hector F. , Fonseca-Benítez A. V. , Perdomo S. J. , Varón-Durán Margarita
Published: February 2024

Design and characterization of 3D spheroids culture plates with embedded FBG sensors for temperature measurements during induced hyperthermia using an RF source, are presented. Additionally, initial observations of the effects on the spheroids are discussed.
Demonstration of A Novel Infrastructure Monitoring Architecture Composed of Directly-connected Telecommunication and Sensing Fibers
Authors: Okamoto Keiji , Imai Michio , Seno Shoji , Kawabata Junichi , Yamashita Aki , Shiino Naoki , Ito Yasuyuki
Published: February 2024

We present a novel concept that improves the availability and the scalability of optical fiber sensing for infrastructure monitoring. We practically constructed the architecture by directly connecting telecommunition and sensing fibers and demonstrated strain measurement.
Concrete Structure Health Monitoring Based on Dynamic Optical Frequency Domain Reflectometry
Authors: Kim Young Ho , Kim Huioon , Kim Hyojong , Jeong Hyoyoung , Kim Myoung Jin
Published: February 2024

We report the feasibility of an OFDR system that is capable of high-speed distributed strain measurement for real-time health monitoring of concrete structures. When a concrete column was shaken by a seismic wave, the strain amplitude changes and frequency response were measured with a data comparison between the OFDR and strain gauge.
New avenues in optical fiber sensing using gas
Authors: Thévenaz Luc , Yang Fan , Gyger Flavien , Zhang Li , Galal Malak , Yang Yuting , Soto Marcelo A.
Published: February 2024

Gases turn out to be a very attractive medium for optical fiber sensing, showing highly flexible possibilities though widely unexploited so far. A new era opens for fiber sensing, exploiting the unprecedented potentialities of fluids.
High Q/V photonic crystal nanocavities on fiber tips
Authors: Hendriks A. L. , Rabelink D. , van Veldhoven P.J. , Verhagen E. , Fiore A.
Published: February 2024

We report optimized photonic crystal cavities transferred to fiber tips with efficient coupling into the numerical aperture. Due to their high Q and small mode volume, these cavities may find applications in ultrafine-particle and bio-sensing.
Measuring kinetic and efficiency metrics of capacitive deionization by an optical fiber sensor
Authors: Huang Tiansheng , Sun Li-Peng , Guan Bai-Ou
Published: February 2024

This work presents a lab-on-fiber application for measuring electrochemical deionization activities. The electrically driven capacitance and adsorption processes are refractometrically recorded by the optical fiber sensors, which enable accurate evaluation of kinetic and efficiency metrics.
Accurate Eye-Tracking from Deflectometric Information using Deep Learning
Authors: Choi Jiwon , Wang Jiazhang , Wang Tianfu , Willomitzer Florian
Published: February 2024

We introduce an accurate eye-tracking method that exploits deflectometric information and uses deep learning to reconstruct the gaze direction. We demonstrate real world experiments with evaluated gaze errors below 1°.