Results in Optics最新文献_第2页

Big data architectures for distributed acoustic sensing: a review of storage, real-time processing, and scalable analytics 分布式声学传感的大数据架构：存储、实时处理和可扩展分析的回顾

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-04 DOI: 10.1016/j.rio.2026.101028

Muhammad Rafi , Khairul Arifin M Noh , Abdul Halim Abdul Latiff , Alidu Rashid , Dejen Teklu Asfha , Hasreq Iskandar Mustafa

{"title":"Big data architectures for distributed acoustic sensing: a review of storage, real-time processing, and scalable analytics","authors":"Muhammad Rafi , Khairul Arifin M Noh , Abdul Halim Abdul Latiff , Alidu Rashid , Dejen Teklu Asfha , Hasreq Iskandar Mustafa","doi":"10.1016/j.rio.2026.101028","DOIUrl":"10.1016/j.rio.2026.101028","url":null,"abstract":"<div><div>This review examines the end-to-end computational pipeline for DAS big data workloads, from acquisition constraints shaped by fiber optic physics to storage architectures, real-time processing frameworks, and scalable analytics. We synthesize peer reviewed evidence on compression strategies, stream processing engines, distributed training, and hardware acceleration, while critically evaluating claims of cost reduction, latency improvement, and energy efficiency against operational benchmarks from field deployments. Domain applications in industrial monitoring, geophysical sensing, and environmental observation are discussed with attention to cross-domain transferability and its limits. We also identify unresolved challenges, including uncertainty in lossy compression, model drift under concept shift, and the need for standardized benchmarking protocols. Finally, we outline prospective developments photonic accelerators, foundation models, and autonomous closed loop systems as emerging research directions rather than established capabilities. This review is intended for optics and photonics researchers seeking to understand how computational infrastructure choices interact with the physical properties of fiber-optic sensing.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101028"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Illumination-enhancement guided CNN-Transformer for robust grading of diabetic retinopathy from fundus images 照明增强引导CNN-Transformer从眼底图像稳健分级糖尿病视网膜病变

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-03 DOI: 10.1016/j.rio.2026.101026

Hrijuta Datta , Ashish Kumar Bhandari

{"title":"Illumination-enhancement guided CNN-Transformer for robust grading of diabetic retinopathy from fundus images","authors":"Hrijuta Datta , Ashish Kumar Bhandari","doi":"10.1016/j.rio.2026.101026","DOIUrl":"10.1016/j.rio.2026.101026","url":null,"abstract":"<div><div>Diabetic Retinopathy (DR) is a deteriorative retinal disease with the risk of irreversible vision impairment, resulting from the severe complications of a chronic disorder known as Diabetes Mellitus (DM). Prevention and precaution at an early stage, with accurate detection of DR severity level, are significantly effective for on-time clinical intervention and vision preservation. This paper describes an enhancement-based ensemble classifier deep learning framework for automated DR grading using retinal fundus images. The proposed work integrates a two-stage methodology comprising enhancement and classification. In the first stage, the retinal images from three public datasets Asia Pacific Tele-Ophthalmology Society (APTOS) 2019 Blindness Detection, Diabetic Retinopathy Dataset (DDR), and Indian Diabetic Retinopathy Image Dataset (IDRiD) and a private dataset from PC Chatterjee Memorial Eye Hospital undergo standardized preprocessing operations such as cropping, normalization, and Gaussian blur-based noise removal, followed by lesion localization via color space separation. The preprocessed images are then enhanced using Zero-Reference Deep Curve Estimation++ (Zero-DCE++) integrated with dynamic Contrast Limited Adaptive Histogram Equalization (CLAHE), which amplifies low-contrast and lesion regions for improved feature extraction. In the second stage, an ensemble of six advanced architectures, Convolutional Network Next (ConvNeXt), Residual Network with 152 Layers (ResNet152), Residual Network with 50 Layers (ResNet50), Densely Connected Convolutional Network with 121 Layers (DenseNet121), Extreme Inception (Xception), and Shifted Window Transformer (Swin Transformer), is utilized for DR grading. The proposed model achieved classification accuracies of 98.54% on the APTOS 2019 dataset,98.14% on the DDR, and 97.29% on IDRiD, highlighting the significance of the proposed model, its reliability, and effectiveness as a clinical decision support system for DR screening and severity assessment.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101026"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cavity-free random Raman dye laser based on Rhodamine B dye and eco-friendly synthesized ZnO nanoparticles 基于罗丹明B染料和环保合成ZnO纳米粒子的无腔随机拉曼染料激光器

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-04-19 DOI: 10.1016/j.rio.2026.101019

Sakine Navaei, Maryam Aliannezhadi, Mohaddeseh Jamali

{"title":"Cavity-free random Raman dye laser based on Rhodamine B dye and eco-friendly synthesized ZnO nanoparticles","authors":"Sakine Navaei, Maryam Aliannezhadi, Mohaddeseh Jamali","doi":"10.1016/j.rio.2026.101019","DOIUrl":"10.1016/j.rio.2026.101019","url":null,"abstract":"<div><div>In the paper, a cavity-free random Raman laser is proposed to be produced based on Rhodamine B (RhB) dye containing ZnO nanoparticles synthesized by a green route using walnut-husk extract. The ZnO nanoparticles serve as strong scattering centers, enabling diffuse feedback in a disordered gain medium and supporting multiple Raman-active modes without the need for well-defined resonators. Comprehensive characterization of the ZnO constituents reveals that nanoscale agglomerated spherical particles with sizes predominantly 20–25 nm (average 21.4 ± 4.1 nm), a Zn–O-rich composition with residual carbon from the walnut extract, with an amorphous structure. Optical analysis reveals refractive indices at 532 nm ranging from 2.07 to 2.20, as determined by Moss, Herve, and the wavelength-dependent methods, consistent with robust scattering, and a dielectric function characterized by a strong UV interband absorption signature. Lasing performance is demonstrated by pumping RhB/ZnO dispersions using a Nd: YAG laser at 532 nm. Results indicate the potential of green-synthesized ZnO nanoparticles as scattering centers for the development of eco-friendly random laser systems. The output power of the proposed random Raman laser exhibits multi-mode operation with ultra-narrow linewidths and high quality factors. Multimode random Raman laser operation in the 561–581 nm region is achieved using the proposed cavity-free laser. The proposed laser benefits from a sustainable synthesis route, straightforward solution processing, and potential for scalable, low-cost photonic devices.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101019"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147741351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical investigation and numerical optimization of multi-cone Au nanostructures for plasmonic resonance and SERS sensitivity 多锥金纳米结构等离子体共振和SERS灵敏度的理论研究与数值优化

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-04-08 DOI: 10.1016/j.rio.2026.101017

Hossein Bogheiri, Maryam Aliannezhadi, Leyla Naderi, Mahdi Sovizi

{"title":"Theoretical investigation and numerical optimization of multi-cone Au nanostructures for plasmonic resonance and SERS sensitivity","authors":"Hossein Bogheiri, Maryam Aliannezhadi, Leyla Naderi, Mahdi Sovizi","doi":"10.1016/j.rio.2026.101017","DOIUrl":"10.1016/j.rio.2026.101017","url":null,"abstract":"<div><div>In this paper, innovative multi-cone gold nanostructures are proposed and simulated to explore their potential for localized surface plasmon resonance (LSPR)-based applications, including highly enhanced surface-enhanced Raman scattering (SERS). By systematically analyzing two-, four-, and six-cone geometries with a fixed diameter and varying heights, it is demonstrated that the designed nanostructures support intensely localized hot spots and strong near-field enhancements. The optical responses of nanostructures are investigated, and the results show that cone number and geometry tune the LSPR and the magnitude of near-field amplification. Notably, all designed configurations exhibit significant field enhancements and red-shifted LSPR compared with simpler geometries like spherical gold nanoparticles. Increasing the cone number from two to six leads to a red shift in LSPR wavelength and lower maximum electric field enhancement, indicating that a biconical or two-cone gold nanoparticle has the best efficiency for the mentioned applications. Also, studying the coupling effects in the two-cone nanoparticle reveals pronounced interparticle plasmonic interactions, a pronounced red shift of LSPR, and ultra-high electric-field magnitudes in the gap region, yielding substantial Raman enhancements beyond conventional Raman spectroscopy. The results indicate that carefully engineered multi-cone nanostructures offer a versatile platform for highly sensitive and selective sensing, with potential applications in biomedical diagnostics and environmental monitoring. Our findings provide a systematic framework for designing nanostructures with tailored plasmonic responses and provide the way for future advances in nanoscale sensing, photonics, and plasmonic technologies.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101017"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147704917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TDLAS-based exhaled methane detection for screening of cerebrovascular diseases 基于tlas的呼气甲烷检测在脑血管疾病筛查中的应用

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-04-28 DOI: 10.1016/j.rio.2026.101023

Jiaxin Song , Zhaopeng Li , Hengrui Zhang , Chen Zhu , Kuantong Zhang , Tao Zhang , Cunguang Lou , Bin Dong

{"title":"TDLAS-based exhaled methane detection for screening of cerebrovascular diseases","authors":"Jiaxin Song , Zhaopeng Li , Hengrui Zhang , Chen Zhu , Kuantong Zhang , Tao Zhang , Cunguang Lou , Bin Dong","doi":"10.1016/j.rio.2026.101023","DOIUrl":"10.1016/j.rio.2026.101023","url":null,"abstract":"<div><div>The detection of volatile organic compounds (VOCs) in exhaled breath has emerged as one of the most promising non-invasive diagnostic methods in the medical field. In this study, a highly sensitive real-time exhaled methane (CH<sub>4</sub>) detection system based on tunable diode laser absorption spectroscopy (TDLAS) technology was developed, and the correlation between gut microbiota metabolites and neurological diseases was investigated. The TDLAS system utilized a 3.334 μm mid-infrared laser with a 60-meter optical path Herriott cell, achieving a parts-per-billion (ppb)-level detection limit. The study employed a support vector machine (SVM) algorithm to construct a classification model. Exhaled breath from healthy controls and patients with transient ischemic attack (TIA), multi-cerebral infarction (MCI), acute cerebral infarction (ACI) was analyzed, and revealed significantly higher CH<sub>4</sub> concentrations in the patient groups (p < 0.05), among which the TIA group exhibited the highest concentration. This study confirms that exhaled CH<sub>4</sub> detection can serve as a non-invasive screening tool for cerebrovascular diseases and provides a new technological platform for research on the gut-brain axis mechanism. These findings hold significant clinical value for the early diagnosis and intervention of neurological disorders.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101023"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, magnetic, photoluminescence and lifetime studies of Gd, Dy and (Gd, Dy) co-doped CuS nanostructures Gd， Dy和（Gd, Dy）共掺杂cu纳米结构的结构、磁性、光致发光和寿命研究

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-03 DOI: 10.1016/j.rio.2026.101025

N. Sai Kumar, Anubendu Adhikary

{"title":"Structural, magnetic, photoluminescence and lifetime studies of Gd, Dy and (Gd, Dy) co-doped CuS nanostructures","authors":"N. Sai Kumar, Anubendu Adhikary","doi":"10.1016/j.rio.2026.101025","DOIUrl":"10.1016/j.rio.2026.101025","url":null,"abstract":"<div><div>The study aims to synthesise undoped, Gd, Dy, and Gd-Dy co-doped Copper Sulphide (CuS) nanostructures using a hydrothermal method and to investigate their structural, optical, morphological, and magnetic properties using X-ray diffraction (XRD), Rietveld Refinement analysis, Raman, XPS, UV–Vis spectroscopy, BET, DLS, photoluminescence (PL) spectroscopy, TCSPC, field-emission scanning electron microscopy (FESEM), and vibrating sample magnetometry (VSM). XRD analysis verified that CuS crystallizes in the hexagonal covellite structure. The doped CuS nanostructures exhibited an augmented band gap in comparison to the undoped sample. XPS analysis revealed the chemical states of the synthesised samples. BET surface area analysis pointed out a notable increase in surface area and microporosity upon rare-earth metal doping. FESEM analysis verified the formation of nanoflake structures. When excited at 350 nm, the photoluminescence spectra at room temperature showed violet-blue and orange-red emission peaks. The CIE chromaticity diagram showed that the samples could be used as blue phosphors. Magnetic measurements indicated that the co-doped samples display low-field ferromagnetism, implying potential applications in magnetic devices.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101025"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical coherence tomography and chlorophyll fluorescence for a non-destructive evaluation of pea seed priming effect of carbon nanotubes 光学相干层析成像和叶绿素荧光无损评价碳纳米管豌豆种子启动效应

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-05 DOI: 10.1016/j.rio.2026.101024

Maryam Viqar , Elena Stoykova , Violeta Madjarova , Violeta Velikova , Sashka Krumova , Keehoon Hong , Dimana Nazarova

{"title":"Optical coherence tomography and chlorophyll fluorescence for a non-destructive evaluation of pea seed priming effect of carbon nanotubes","authors":"Maryam Viqar , Elena Stoykova , Violeta Madjarova , Violeta Velikova , Sashka Krumova , Keehoon Hong , Dimana Nazarova","doi":"10.1016/j.rio.2026.101024","DOIUrl":"10.1016/j.rio.2026.101024","url":null,"abstract":"<div><div>With rapid advancements in nanotechnology, seed nano-priming gained significant attention with respect to enhancement of plants resilience towards a variety of stresses. In this work, we checked the potential of optical coherence tomography (OCT) and chlorophyll fluorescence for analysis of the effect of Pluronic P85 grafted single-walled carbon nanotubes and hydro priming on gemination of pea (<em>Pisum sativum</em> var. RAN-1) seeds. We used a swept-source OCT system to acquire volumetric data in time (4D data) and to perform structural and biospeckle analysis of these carbon nanotubes and hydro-primed seeds grown on wet filter paper and in soil with respect to untreated control seeds. We estimated co-occurrence matrix parameters and intensity-based pointwise correlation function for statistical evaluation of the general biological activity inside the seeds. Examination of activity maps not only as axial scans but also at different depth (within the scope of the imaging system) through enface scans showed clear distinction of different treatments, thus demonstrating the OCT efficiency in non-destructive analysis of seeds and their response to external agents. Chlorophyll fluorescence provided valuable information; however, compared with this method, the OCT technique proved to be more powerful in detecting alterations in biological activity between different treatments.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101024"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectroscopic and non-linear optical studies of erythrosine dye-doped boric acid glass system 红红素染料掺杂硼酸玻璃体系的光谱和非线性光学研究

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Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-04-01 DOI: 10.1016/j.rio.2026.101015

Sharwan Kumar, David Joseph

引用次数: 0

Cardinality enrichment of 3-D FCC-MDW code in wavelength/time/space domains for non-coherent OCDMA at 17 Gbps with interference suppression En/Decoder 基于干扰抑制的17 Gbps非相干OCDMA的3-D FCC-MDW码在波长/时间/空间域的基数富集

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Results in Optics Pub Date : 2026-02-01 Epub Date: 2026-02-08 DOI: 10.1016/j.rio.2026.100981

A.J. Rupok , C.B.M. Rashidi , K.N.F.Ku Azir , B. Nakarmi , Mohammad Nayeem Morshed

{"title":"Cardinality enrichment of 3-D FCC-MDW code in wavelength/time/space domains for non-coherent OCDMA at 17 Gbps with interference suppression En/Decoder","authors":"A.J. Rupok , C.B.M. Rashidi , K.N.F.Ku Azir , B. Nakarmi , Mohammad Nayeem Morshed","doi":"10.1016/j.rio.2026.100981","DOIUrl":"10.1016/j.rio.2026.100981","url":null,"abstract":"<div><div>This paper introduces a new Interference Suppression Scheme (ISS) for wavelength/time/spatial Optical Code Division Multiple Access (OCDMA) systems, demonstrated through a new 3-D FCC-MDW coding architecture. The 3-D FCC-MDW code offers flexible in-phase cross-correlation, effectively reducing Phase-Induced Intensity Noise (PIIN) and Multiple-Access Interference (MAI). The 3-D FCC-MDW ISS-OCDMA (<em>M</em> = 7, <em>N</em> = 13, <em>P</em> = 3) system shows good performance, offering cardinality enrichments of 7.43 times, 9.65 times, and 8 times compared to 2-D FCC-MDW (<em>M</em> = 23, <em>N</em> = 7), 3D-MD (<em>M</em> = 7, <em>N</em> = 13, <em>P</em> = 3), and 3D-VWZCC (<em>M</em> = 7, <em>N</em> = 13, <em>P</em> = 3) codes, respectively. Furthermore, its low optical received power of −26 dBm signifies enhanced receiving sensitivity and great scalability for next-generation OCDMA systems without requiring amplification at the receiving end. The simulation results visually confirm the signal quality and timing accuracy of the proposed 3-D FCC-MDW ISS-OCDMA (<em>M</em> = 7, <em>N</em> = 13, <em>P</em> = 3) system operating at 17 Gbps. In addition, simulation over a 50 km fiber link confirms the robustness of the proposed 3-D FCC-MDW ISS-OCDMA system. At 622 Mbps, it achieves a Q-factor of 11.6 and BER of 1.06 × 10<sup>−31</sup>, while at 2.5 Gbps, the Q-factor remains 8.7 with BER 1.14 × 10<sup>−18</sup>. The open eye diagram demonstrates stable, error-free transmission without optical amplification. Therefore, the 3-D FCC-MDW ISS-OCDMA coding method greatly increases system capacity, reduces noise effects, and strengthens signal transmission, providing an efficient and flexible solution for FTTH application.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"23 ","pages":"Article 100981"},"PeriodicalIF":3.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Field performance and deployment challenges of a BOTDA-based distributed fibre optic inclinometer for microtunneling-induced ground deformation monitoring 基于botda的微隧道地表变形监测分布式光纤倾角仪的现场性能和部署挑战

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Results in Optics Pub Date : 2026-02-01 Epub Date: 2026-01-23 DOI: 10.1016/j.rio.2026.100974

Muhammad Farid Ghazali , Hisham Mohamad , Muhammad Yusoff Mohd Nasir , Muhammad Aizzuddin Abdullah , Alarifi Hamzh , Muhammad Noor Adam Bin Kamaruzaman

{"title":"Field performance and deployment challenges of a BOTDA-based distributed fibre optic inclinometer for microtunneling-induced ground deformation monitoring","authors":"Muhammad Farid Ghazali , Hisham Mohamad , Muhammad Yusoff Mohd Nasir , Muhammad Aizzuddin Abdullah , Alarifi Hamzh , Muhammad Noor Adam Bin Kamaruzaman","doi":"10.1016/j.rio.2026.100974","DOIUrl":"10.1016/j.rio.2026.100974","url":null,"abstract":"<div><div>Reliable monitoring of ground deformation during microtunneling is essential for safeguarding adjacent infrastructure and understanding soil–structure interaction under construction-induced loading. This study presents a performance evaluation of a Brillouin Optical Time Domain Analysis (BOTDA)-based distributed fibre optic strain sensing (DOFSS) inclinometer system applied to a microtunneling project beneath an active railway in Ipoh, Malaysia. Rather than introducing a new sensing methodology, the study focuses on assessing the practical performance, deployment behaviour, and limitations of a distributed fibre optic (FO) inclinometer under real construction conditions. The monitoring programme integrates laboratory calibration, field deployment, fibre integrity assessment, and numerical validation. Laboratory cantilever tests were conducted to verify strain transfer behaviour and calibrate strain-to-curvature and displacement reconstruction. Vertical and horizontal FO inclinometers were deployed to capture subsurface lateral deformation and near-surface settlement during pipe jacking operations. Field measurements identified clear deformation responses associated with the approach, passage, and departure of the tunneling machine. Fibre breakage events were analysed using Optical Time-Domain Reflectometry (OTDR), providing insight into installation-induced effects, grout stiffness, and casing rigidity on fibre survivability. Staged numerical simulations reproduced the observed deformation trends, supporting interpretation of field measurements. Overall, the results demonstrate that BOTDA-based distributed fibre optic inclinometers are effective for capturing spatially continuous trends of construction-induced ground deformation when installation strategy and mechanical coupling are appropriately controlled.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"23 ","pages":"Article 100974"},"PeriodicalIF":3.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0