Optical Fiber Technology最新文献_第9页

A novel Vernier effect fiber optic sensor with tunable M-factor via effective refractive index adjustment 一种基于有效折射率调节的m因子可调的游标效应光纤传感器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-23 DOI: 10.1016/j.yofte.2025.104346

Yujia Wang , Xianping Fu

{"title":"A novel Vernier effect fiber optic sensor with tunable M-factor via effective refractive index adjustment","authors":"Yujia Wang , Xianping Fu","doi":"10.1016/j.yofte.2025.104346","DOIUrl":"10.1016/j.yofte.2025.104346","url":null,"abstract":"<div><div>In this paper, we present the design and fabrication of a Vernier effect sensor with a tunable magnification factor (M-factor). We define a set of limiting conditions to specify the applicable range of the sensing and reference extrinsic Fabry-Perot interferometer (EFPI) cavity lengths (L<sub>s</sub> and L<sub>r</sub>) and their effective refractive indices (n<sub>s</sub> and n<sub>r</sub>), which ensure the stability of the Vernier effect and reliable signal demodulation. Simulations are conducted to validate the proposed limiting conditions by analyzing spectral characteristics under varying relative length differences. The simulation results confirm the effectiveness of the proposed framework. To make the M-factor tunable and extend the feasible range for length design, we propose a method to adjust the M-factor by tuning the effective refractive index (RI) of the EFPI. This adjustment of RI affects the detuning factor, which in turn allows precise control of the M-factor. Various combinations of L<sub>s</sub>, n<sub>s</sub> and n<sub>r</sub> are simulated to assess their impact on the Vernier effect and to investigate the applicable range of these parameters. Finally, we fabricate the proposed M-factor tunable Vernier effect sensor and verify the theoretical predictions through experiments. The experimental results show that by using the fabricated EFPI and the RI range provided by saline solutions, an M-factor tuning range of 6.5 to 9.5 is achieved. These results closely match the simulations, confirming the feasibility and reliability of the proposed framework for practical sensor applications. Building on these findings, the sensor could broaden its applicable range through targeted design, offering greater flexibility for various applications.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104346"},"PeriodicalIF":2.6,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Randomly coupled trench-assisted seven-core fiber with a high tolerance for fabrication error 具有高制造误差容忍度的随机耦合沟槽辅助七芯光纤

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-23 DOI: 10.1016/j.yofte.2025.104296

Zhilu Luo , Jiajing Tu , Lei Shen , Lei Zhang , Weiping Liu

{"title":"Randomly coupled trench-assisted seven-core fiber with a high tolerance for fabrication error","authors":"Zhilu Luo , Jiajing Tu , Lei Shen , Lei Zhang , Weiping Liu","doi":"10.1016/j.yofte.2025.104296","DOIUrl":"10.1016/j.yofte.2025.104296","url":null,"abstract":"<div><div>In the research field of space division multiplexing technology, randomly coupled multi-core fiber (RC-MCF) is a hot topic in the application scenario of ultra-long-distance transmission because its group delay spread (GDS) is convergent as the transmission distance increases, which can decrease the complexity of the multiple-input multiple-output digital signal processing algorithm. However, because of unavoidable fabrication errors in the fiber structure, the GDS of the fabricated RC-MCFs may differ from the design value to a large extent. Adding trench-assisted structures has been proven to be a possible way to improve the tolerance of fabrication errors and make cores more compact. In this work, we design and fabricate a randomly coupled trench-assisted seven-core multi-core fiber (RC-TA-7-MCF) with a standard cladding diameter of <span><math><mrow><mn>125</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>. In addition, we calculate the GDS using the actual index profiles of RC-TA-7-MCF with or without trench layers, demonstrating that the trench structure helps RC-TA-7-MCF obtain a high tolerance of fabrication errors.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104296"},"PeriodicalIF":2.6,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on roof fracture low of inclined coal seam by optical fiber sensing 斜煤层顶板裂隙低的光纤传感试验研究

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-21 DOI: 10.1016/j.yofte.2025.104328

Wengang Du , Dingding Zhang , Bo Wang , Qiang Liu

{"title":"Experimental study on roof fracture low of inclined coal seam by optical fiber sensing","authors":"Wengang Du , Dingding Zhang , Bo Wang , Qiang Liu","doi":"10.1016/j.yofte.2025.104328","DOIUrl":"10.1016/j.yofte.2025.104328","url":null,"abstract":"<div><div>In the mining of inclined coal seams, the roof strata exhibit asymmetric deformation characteristics due to the unbalanced stress distribution, non-uniform gangue filling, and other influencing factors. This results in distinct vertical zoning characteristics of overburden in the dip direction compared to horizontal coal seams. To investigate the roof failure mechanisms and fractured zone distribution in inclined coal seam mining, distributed optical fiber sensing technology is utilized in physical similarity tests. By arranging optical fibers within the model, real-time monitoring of deformation and stress fields on the model’s surface and interior is achieved. Analysis of the average strain increment (ASI) calculation results indicates that roof movement in the dip direction can be detected using optical fiber sensing, particularly sensitive to the working face passing through the optical fiber and the roof abscission layer opening. Quantitatively, when a significant abscission layer forms in the roof, the strain transition at the intersection of the abscission layer and optical fiber exceeds 2000 με, yielding ASI values for the entire fiber exceeding 400. This study has certain reference significance for the application of fiber optic sensing technology in the study of roof failure and stress distribution in inclined coal seam mining.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104328"},"PeriodicalIF":2.6,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel highly sensitive suspended-type fiber Bragg grating earth pressure sensor 一种新型高灵敏度悬架式光纤光栅土压力传感器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-21 DOI: 10.1016/j.yofte.2025.104350

Heying Qin , Zhaoyu Zhang , Guoyuan Hu , Danping Lai , Boguang Luo

{"title":"A novel highly sensitive suspended-type fiber Bragg grating earth pressure sensor","authors":"Heying Qin , Zhaoyu Zhang , Guoyuan Hu , Danping Lai , Boguang Luo","doi":"10.1016/j.yofte.2025.104350","DOIUrl":"10.1016/j.yofte.2025.104350","url":null,"abstract":"<div><div>With the widespread construction of geotechnical underground structures, the need for accurate earth pressure monitoring has grown increasingly important. Traditional fiber Bragg grating (FBG) earth pressure sensors often face limitations such as low sensitivity, vulnerability to eccentric loading, and grating chirp. This study presents a highly sensitive suspended-type FBG earth pressure sensor that uses a combined design of a bearing plate and a hard-core elastic diaphragm. The structure converts earth pressure into uniform axial strain in the optical fiber through a rigid rod, effectively minimizing chirp effects. A theoretical sensitivity model was developed, and five prototype sensors with varying structural parameters were fabricated. Comprehensive experiments, including sensitivity calibration, eccentric loading tests, sand pressure calibration, and temperature compensation, were conducted to evaluate performance. The sensor achieved a maximum sensitivity of 4.0458 nm/MPa in the 0–0.4 MPa range, with a linearity error ≤ 2.01 %, hysteresis error ≤ 2.52 %, repeatability error ≤ 4.06 %, and overall accuracy error within 5 %. Eccentric loading and sand pressure tests demonstrated the sensor’s reliability under uneven stress distributions and realistic soil conditions. Additionally, temperature compensation significantly reduced cross-sensitivity effects in the range of 20 °C and 70 °C. These results indicate that the proposed sensor offers a robust and accurate solution for geotechnical pressure monitoring.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104350"},"PeriodicalIF":2.6,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

I-PID based traffic prediction and intelligent mode transformation algorithm for virtual Multi-OLT PON 基于I-PID的虚拟多olt PON流量预测及智能模式转换算法

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-19 DOI: 10.1016/j.yofte.2025.104348

Dong Su, Fei Wang, Jinyu Wang

{"title":"I-PID based traffic prediction and intelligent mode transformation algorithm for virtual Multi-OLT PON","authors":"Dong Su, Fei Wang, Jinyu Wang","doi":"10.1016/j.yofte.2025.104348","DOIUrl":"10.1016/j.yofte.2025.104348","url":null,"abstract":"<div><div>The exponential growth in global network traffic, driven by emerging technologies like 8 K Virtual Reality (VR) and Internet of Things (IoT), has exposed critical limitations in traditional time division multiplexed passive optical network (TDM-PON) architectures, particularly their rigid bandwidth allocation and inability to adapt to dynamic service demands. This study addresses these challenges by presenting a novel mode transformation algorithm based on traffic prediction for PON networks. Firstly, the traffic prediction method based on improved proportion integration differentiation (I-PID) control algorithm is proposed, which ensures the accuracy of traffic prediction and significantly reduces the complexity of practical applications. Moreover, the mode transformation algorithm, which called intelligent optical network unit (ONU) packing algorithm (IPA), is delineated based on I-PID. In IPA, two packaging algorithms based on load and priority are constructed in virtual multi-OLT PON architecture for mode transformation, which ensure the network load balancing effectively. Through the numerical calculation and simulation of different aspects, conclusions can be drawn. Firstly, the performance of I-PID-based traffic prediction is better than the traditional algorithms, especially under periodic traffic conditions. Secondly, IPA possesses lower error rate, smaller average delay, and better integrated throughput among multiple PON subsystems. Meanwhile, the packet loss of IPA is further improved when the system load exceeds 1. In summary, the mode transformation algorithm IPA introduced in this paper leads to significant performance improvement of virtual multi-OLT PON system and provides a new approach for engineering practice.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104348"},"PeriodicalIF":2.6,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accurately switchable multiple transverse modes generation with fiber laser 光纤激光器可精确切换多横模生成

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-18 DOI: 10.1016/j.yofte.2025.104343

Xinhua Jiang , Junna Yao , Qiwen Zhan , Anting Wang

引用次数: 0

Multi-layer reservoir computer based on wavelength division multiplexing optoelectronic feedback loops 基于波分复用光电反馈回路的多层储层计算机

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-18 DOI: 10.1016/j.yofte.2025.104344

Shiyi Cai , Mengyao Han , Pufeng Gao , Jian Wang , Beilei Wu , Chuncan Wang , Zixiao Wang , Jian Sun , Muguang Wang

{"title":"Multi-layer reservoir computer based on wavelength division multiplexing optoelectronic feedback loops","authors":"Shiyi Cai , Mengyao Han , Pufeng Gao , Jian Wang , Beilei Wu , Chuncan Wang , Zixiao Wang , Jian Sun , Muguang Wang","doi":"10.1016/j.yofte.2025.104344","DOIUrl":"10.1016/j.yofte.2025.104344","url":null,"abstract":"<div><div>Time-delayed reservoir computer (RC) is a bio-inspired neural network, exhibiting significant performance in temporal information processing. Compared with single-layer RC, multi-layer RC boasts a superior dimension-raising ability and better processing capacity, leading to an enhanced performance in challenging tasks with huge volumes of data, e.g., pattern recognition, sequence prediction and image processing. Generally, an increase in the number of layers is accompanied by increased hardware structure complexity. To simplify the hardware structure, a multi-layer RC based on wavelength division multiplexing optoelectronic feedback loops is proposed and numerically studied. Improved performances in nonlinear auto regressive moving average equation of order 10 task, nonlinear channel equalization task, and isolated spoken digit recognition task highlight the superiority of multi-layer RC over previous single-layer RCs. Among them, the multi-layer RC based on wavelength division multiplexing achieves a word error rate of 0.2% in TI46 task. The performance confirms a great potential of multi-layer optoelectronic RC for information processing applications with minimized hardware complexity.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104344"},"PeriodicalIF":2.6,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Porphyrin immobilized evanescent wave absorption-based optical platform: classification of multiple volatile gases using machine-learning assisted spectral pattern recognition algorithms 基于卟啉固定倏逝波吸收的光学平台：使用机器学习辅助光谱模式识别算法对多种挥发性气体进行分类

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-17 DOI: 10.1016/j.yofte.2025.104340

Soma Saha , Kaustubh Kundu , Tapanendu Kundu

{"title":"Porphyrin immobilized evanescent wave absorption-based optical platform: classification of multiple volatile gases using machine-learning assisted spectral pattern recognition algorithms","authors":"Soma Saha , Kaustubh Kundu , Tapanendu Kundu","doi":"10.1016/j.yofte.2025.104340","DOIUrl":"10.1016/j.yofte.2025.104340","url":null,"abstract":"<div><div>The study presents an efficient porphyrin-immobilized optical fiber gas sensing platform utilizing evanescent wave absorption technology, capable of multiple gas detection and identification facilitated by supervised and unsupervised machine learning algorithms. While this technique provides the capability to observe real-time gas phase molecular interactions, porphyrin macromolecules, due to their distinctive electronic transitions and tunable chemical properties, function as the active material for sensing chemical interactions with gas analytes. The perturbation of electronic transitions due to the association of porphyrin with gas analytes leads to specific changes in UV–Vis absorption spectra. These changes create characteristic spectral patterns based on the nature of interaction; those have been analyzed using unsupervised learning techniques for clustering and anomaly detection, enabling the system for identification. Supervised learning algorithms are also employed for classification tasks, and the analysis infers that to improve the accuracy of identification, pre-processing of spectral data is essential in isolating the spectral content pertinent to the interaction between porphyrin and specific gas analytes. This step ensures the extraction of accurate and relevant features from raw spectral data, facilitating robust gas detection and classification with a cent percent accuracy. This study infers that the information in the spectral domain is adequate to classify several gases, employing advanced machine-learning techniques to elucidate interaction mechanisms even in weak bond formation with porphyrin. This platform, along with developed classification algorithms, is a potentially useful gas sensor for industrial, medical, and environmental applications.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104340"},"PeriodicalIF":2.6,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Overhanging optical fiber acoustic pressure sensor 悬垂式光纤声压传感器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-17 DOI: 10.1016/j.yofte.2025.104335

Heng-yi Kou, Mao-wei Liu, Xin-yu Zhang, Dan-lu Zhang, Rui-ping Jing

引用次数: 0

Optical fiber axial residual stress distribution measurement based on phase compensation using circular polariscope 基于相位补偿的圆偏光镜光纤轴向残余应力分布测量

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-07-16 DOI: 10.1016/j.yofte.2025.104347

Lewen Gong, Sujuan Huang, Cheng Yan, Ning Ma, Yuanji Qin

{"title":"Optical fiber axial residual stress distribution measurement based on phase compensation using circular polariscope","authors":"Lewen Gong, Sujuan Huang, Cheng Yan, Ning Ma, Yuanji Qin","doi":"10.1016/j.yofte.2025.104347","DOIUrl":"10.1016/j.yofte.2025.104347","url":null,"abstract":"<div><div>We present a method to measure axial residual stress distribution in optical fibers based on phase compensation using circular polariscope. The intensity distribution characteristics of fiber polarization information in circular polariscope is analyzed by the Jones matrix. The least square polynomial is used to fit the minimum intensity and obtain the corresponding compensated phase. The phase retardation distribution is derived from the compensated phase. For circularly symmetric structured fiber, a layered model algorithm is constructed to obtain the one-dimensional axial residual stress distribution. For non-circularly symmetric structured fiber, the two-dimensional stress distribution is reconstructed by the filtered back projection algorithm based on computed tomography. To evaluate the proposed method, the residual stress distribution of single-mode optical fiber is measured and compared with the result from the commercial instrument IFA-100. The correlation coefficient exceeds 0.99 and the estimated residual stress noise is ±0.3 MPa. The axial residual stress distribution at the cut-off region of multimode fiber and the cross-sectional distribution of polarization-maintaining fiber are measured. The relation between the structural characteristics of axial residual stress and the refractive index distribution is also analyzed. Measurement of residual stress distribution can provide useful insights for optimizing fabrication processes and enhancing fiber performance.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104347"},"PeriodicalIF":2.6,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0