Iet Optoelectronics最新文献

Extreme Learning Machine Models for Classifying the LED Source in a 2D Visible Light Positioning Database

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2025-04-26 DOI: 10.1049/ote2.70004

David Zabala-Blanco, Cesar A. Azurdia-Meza, Benjamín Lobos Soto, Ismael Soto, Pablo Palacios Játiva, Roberto Ahumada-García, Muhammad Ijaz

{"title":"Extreme Learning Machine Models for Classifying the LED Source in a 2D Visible Light Positioning Database","authors":"David Zabala-Blanco, Cesar A. Azurdia-Meza, Benjamín Lobos Soto, Ismael Soto, Pablo Palacios Játiva, Roberto Ahumada-García, Muhammad Ijaz","doi":"10.1049/ote2.70004","DOIUrl":"https://doi.org/10.1049/ote2.70004","url":null,"abstract":"In recent years, there has been a surge in interest in indoor positioning systems that use visible light communication (VLC) technology combined with light-emitting diodes (LEDs). These systems have gained attention because of their ability to offer high bandwidth, precise localisation, and potential for wireless communication to extend into the visible light spectrum in the future, making VLC a notable candidate. Furthermore, the visible light spectrum proves advantageous in the industrial internet of things setting, as it does not offer electromagnetic interference as in radio frequency (RF) spectrum. This paper analyses a database made up of approximately 356 image samples obtained from a CMOS sensor. The database encompasses eight distinct classes, each demonstrating frequency (bit rate) variations ranging from 1 to 4.5 kHz in 500 Hz increments. The aim is to implement this database for classification applications as a first stage with several neural networks based on extreme learning machines (ELM) in various forms: (1) standard ELM, (2) regularised ELM, (3) weighted ELM in two configurations, and (4) multilayer ELM with 2 and 3 hidden layers. The findings of this study reveal that standard ELM is particularly promising, achieving more than 99% in accuracy and G-mean, while maintaining low computational complexity (measured in tenths of seconds) when compared to convolutional neural networks and multilayer perceptrons, which offer superior performance, however at the cost of significant computational demands.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Broadband Plasmonic Photodetector Based on Graphene-Black Phosphorus Heterostructure With Enhanced Absorption and Responsivity

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2025-04-17 DOI: 10.1049/ote2.70003

Feng Zhou

引用次数: 0

Guest Editorial: Towards large-scale commercialisation of space-division multiplexing fibres 特邀社论：实现空间分复用光纤的大规模商业化

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2025-04-12 DOI: 10.1049/ote2.70001

Toshio Morioka, David Braganza, Werner Klaus

{"title":"Guest Editorial: Towards large-scale commercialisation of space-division multiplexing fibres","authors":"Toshio Morioka, David Braganza, Werner Klaus","doi":"10.1049/ote2.70001","DOIUrl":"https://doi.org/10.1049/ote2.70001","url":null,"abstract":"We are delighted to present this special issue of IET Optoelectronics on ‘Towards large-scale commercialisation of Space-division multiplexing (SDM) fibres’. This issue features contributions from five speakers at the ECOC 2023 workshop ‘What Will Eventually Trigger Large-Scale Commercialisation of SDM Fibres?’, held in Glasgow on 1 October 2023.SDM is a promising technology to effectively deal with the unabated growth of data traffic in optical fibre networks. Over the past decade, extensive research on SDM optical fibres has resulted in the development of high-quality, multicore and few-mode fibres as well as other network elements that leverage the SDM concept. Whereas large-scale commercialisation of SDM fibres is essential to meet the ever-increasing demand for higher data rates, achieving practical deployment requires more than innovative fibre designs. It also necessitates system optimisation to reduce cost per bit and standardisation to ensure interoperability. The successful commercialisation of SDM fibres also hinges on the advancement of other network elements such as optical amplifiers, multiplexers, connectors and splices. This special issue explores the challenges and opportunities associated with SDM fibre commercialisation. It aims to identify potential triggers that could accelerate the adoption of SDM technology across various applications such as submarine optical cable systems, terrestrial fibre networks and data centre interconnects.We hope this special issue provides readers with a comprehensive overview of the latest advancements in SDM technologies and valuable insights into their large-scale deployment, paving the way for significant upgrades in optical fibre communication systems in the years ahead.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143822285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plasmonic CH4 Sensor Based on MIM Waveguide Coupled to Circular Nanorod in a Square-Shaped Cavity

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2025-03-18 DOI: 10.1049/ote2.70002

Mohammad Ghanavati, Mohammad Azim Karami

{"title":"Plasmonic CH4 Sensor Based on MIM Waveguide Coupled to Circular Nanorod in a Square-Shaped Cavity","authors":"Mohammad Ghanavati, Mohammad Azim Karami","doi":"10.1049/ote2.70002","DOIUrl":"https://doi.org/10.1049/ote2.70002","url":null,"abstract":"A novel refractive index (RI) plasmonic sensor is designed and simulated, which is expected to make a significant advancement in gas sensing. The sensor is composed of silver, air-filled waveguide and a square shaped cavity. In the implemented cavity, 16 silver circular nanorods (CNs) are locally placed to enhance the sensing performance. Moreover, the cavity is filled with ultraviolet-curable fluoro-siloxane (UVCFS) in order to faithfully characterise methane gas concentrations. RI sensitivity (RIS) for Peak I is 1210.12 ± 4.62 nm/RIU and for Peak II is 969.64 ± 8.56 nm/RIU as well as figure of merit (FoM) of 20.00 ± 0.08 1/RIU at Peak I and 11.82 ± 0.10 1/RIU at Peak II, respectively. Furthermore, a significant methane gas sensitivity (SGas) is achieved: about 4 nm/% for Peak I and about 3 nm/% for Peak II which shows that it can well determine methane gas concentrations. The introduced plasmonic-based sensor brings potential applications in gas sensing due to its high sensitivity as well accuracy in detecting methane gas concentrations.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental demonstrations of high-accuracy 3D/2D indoor visible light positioning using imaging multiple-input multiple-output receivers and artificial neural networks

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2025-02-07 DOI: 10.1049/ote2.70000

Juan. A. Apolo, Isaac. N. O. Osahon, Beatriz Ortega, Vicenç Almenar, Jianming Tang, Sujan Rajbhandari

{"title":"Experimental demonstrations of high-accuracy 3D/2D indoor visible light positioning using imaging multiple-input multiple-output receivers and artificial neural networks","authors":"Juan. A. Apolo, Isaac. N. O. Osahon, Beatriz Ortega, Vicenç Almenar, Jianming Tang, Sujan Rajbhandari","doi":"10.1049/ote2.70000","DOIUrl":"https://doi.org/10.1049/ote2.70000","url":null,"abstract":"This paper proposes and presents the first experimental demonstration of a high-precision indoor 2D and 3D visible light positioning (VLP) system using an imaging multiple-input multiple-output (MIMO) configuration with supervised artificial neural network. The proposed system utilises four distributed transmitters and receiver with four photodiodes and an imaging optics. The experiments are conducted in a typical indoor environment with transmitter separations of 300 mm and a link distance of 1400 mm. The experimental results show 2D and 3D positioning accuracies of 3.7 and 51 mm, respectively. A simulation model is also developed for the VLP system to validate the experimental results. Further optimisation of the VLP system in the simulation platform leads to improved 2D and 3D positioning accuracies of 2 and 14.7 mm, respectively. The proposed system can be seamlessly integrated with existing lighting infrastructures and is also compatible with the MIMO visible light communication system, indicating the potential for practical implementation in integrated communications and positioning applications.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of optical fibres in a passive optical network using highly temperature insensitive filters and reflectors

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2025-01-06 DOI: 10.1049/ote2.12131

Stephanie R. Bally, Ian E. Horsley, Sophie Minoughan, Alistair J. Poustie

引用次数: 0

Design of dynamic range adjustable laser ranging chip based on element sharing

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-12-18 DOI: 10.1049/ote2.12132

Xuanke Tong, Chongzhuo Zhao, Zhiwei Huang, Chuanxin Teng, Shijie Deng

{"title":"Design of dynamic range adjustable laser ranging chip based on element sharing","authors":"Xuanke Tong, Chongzhuo Zhao, Zhiwei Huang, Chuanxin Teng, Shijie Deng","doi":"10.1049/ote2.12132","DOIUrl":"https://doi.org/10.1049/ote2.12132","url":null,"abstract":"This work proposes a design of a dynamic range adjustable laser ranging chip based on element sharing, which combines single photon avalanche diodes and direct time-of-flight (dToF) to address the uncertainty of detection distance in different usage scenarios of laser ranging technology. To achieve adjustable dynamic range of the chip, an element shared control logic circuit based on external control signals is designed and integrated, which can adjust the measurement dynamic range of the chip through external control signals, making it suitable for different usage scenarios. Moreover, when the dynamic range of the chip changes, the measurement resolution of the time-to-digital converter (TDC) in the chip can remain unchanged. Through the analysis of simulation results, it is found that the laser ranging chip designed in this work can adjust the dynamic range from 3 ns to 4.29 s based on external control signals at a resolution of 125 ps, with a reference clock signal input frequency of 20 MHz. The differential non-linearity (DNL) error of TDC is −0.22 LSB to 0.19 LSB, and the integral non-linearity (INL) error is −0.82 LSB to 0.52 LSB. The dynamic range adjustable laser ranging chip based on element sharing designed in this work provides a feasible solution to address the uncertainty of detection distance in laser ranging technology.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143363051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Continuous-wave and cavity-dumped 1064 nm Nd:YVO4 laser based on the magneto-optical effect

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-12-16 DOI: 10.1049/ote2.12133

Jia-Rui Zhong, Ting Zhang

{"title":"Continuous-wave and cavity-dumped 1064 nm Nd:YVO4 laser based on the magneto-optical effect","authors":"Jia-Rui Zhong, Ting Zhang","doi":"10.1049/ote2.12133","DOIUrl":"https://doi.org/10.1049/ote2.12133","url":null,"abstract":"In this paper, continuous-wave and cavity-dumped Nd:YVO4 lasers are studied. Firstly, through theoretical analysis and numerical simulation, the output characteristics of a continuous-wave laser based on the magneto-optical effect are analysed using the rate equation. The continuous adjustment of output power and pump threshold power is realised using the magneto-optical effect to rotate the polarisation direction of laser. The theoretical simulation results show that the output power of the laser could be effectively controlled under different magnetic field intensities. On this basis, the authors explore the cavity-dumped laser system based on the magneto-optical effect. By adjusting the intensity of the magnetic field and rising edge time, the pulse width and waveform could be flexibly adjusted. The relationship between the magnetic field intensity in the low Q period and the spot radius of the pump and the signal beam and the output energy and the output pulse waveform is analysed. These research results lay a foundation for further optimising the design and application of magneto-optical effect lasers.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143363080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Elucidations of electronic and optical properties of the w-ZnCh (Ch=O, S and Se) compounds: Insights from Ab-initio calculations and spectroscopy measurements

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-10-24 DOI: 10.1049/ote2.12128

Mohamed Salah Halati, Zakia Lounis, Oleg Y. Khyzhun, Yves Caudano, Kamel A. Shoush, Prabhu Paramasivam, Sherif S. M. Ghoneim

{"title":"Elucidations of electronic and optical properties of the w-ZnCh (Ch=O, S and Se) compounds: Insights from Ab-initio calculations and spectroscopy measurements","authors":"Mohamed Salah Halati, Zakia Lounis, Oleg Y. Khyzhun, Yves Caudano, Kamel A. Shoush, Prabhu Paramasivam, Sherif S. M. Ghoneim","doi":"10.1049/ote2.12128","DOIUrl":"https://doi.org/10.1049/ote2.12128","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 The electronic and optical properties of IIB-VIA Zn-based monochalcogenides w-ZnCh (Ch: O, S and Se) were reported. The band structures using the FP-LAPW method at zero pressure with the Tran–Blaha-modified Becke–Johnson potential evidence that w-ZnO, w-ZnS and w-ZnSe reveal direct band gaps (Γ–Γ) of 2.72, 3.87, and 2.88 eV, respectively. The complex dielectric function ε(ω), refractive index n(ω), extinction coefficient k(ω), absorption coefficient α(ω), reflectivity R(ω), energy-loss function L(ω) and complex conductivity σ(ω), are determined. The microscopic origin of the observed fine-structure peculiarities in the spectra of the imaginary part of the dielectric function (ε2(ω)) is identified. An intensive X-Ray PhotoElectron Spectroscopy (XPES) investigation shows the effect of controlled UHV treatment (Ar+ ionic bombardment followed by gradual heating) as a method of cleaning and/or re-crystallising the upper layers. XPES and XAES (Auger Electron induced by X-Ray Excitation) transitions substantiate successfully the UHV in situ cleaning. The valence band structure was studied. The PLS technique employing UVvis excitation source of a 325 nm (He-Cd) gas laser unveils that ZnO, zinc sulfide and ZnSe luminescence mechanism concerns the energy band gap. The results of the experimental studies are found to be in good agreement with the theoretical predictions.\u0000 </section>\u0000 </div>","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 6","pages":"188-218"},"PeriodicalIF":2.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANFIS-based controlled spherical rotator with quadrant photodiode to improve position detection accuracy 基于 ANFIS 的带象限光电二极管的受控球形旋转器，可提高位置检测精度

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-10-04 DOI: 10.1049/ote2.12127

Bing-Yuh Lu

{"title":"ANFIS-based controlled spherical rotator with quadrant photodiode to improve position detection accuracy","authors":"Bing-Yuh Lu","doi":"10.1049/ote2.12127","DOIUrl":"https://doi.org/10.1049/ote2.12127","url":null,"abstract":"The authors aim to build a theoretical system for calibrating the position detection of a single quadrant photodiode (QPD) attached to 2D rotators and to suppress noise using a Sugeno-type fuzzy inference system. According to the results, if the original ANFIS network (NWo) is trained under the conditions of resolution (rso), traing samples (No), and the possibility of random noise (po) and presented as {original, rso, No, po}, with the #X testing case presented as {case #X, rsx, Nx, px}, case #X is expected to be the all-pass case of the two root-mean-squared error criteria under the conditions of rsx ≥ rso and px ≤ po. Thus, the measurement accuracy is improved without tracking historical data. Furthermore, the two conditions indicate the limitations of the proposed ANFIS-based method. These conditions can be employed to save time and money. If a company produces many types of QPD rotators with different values of rs, the engineers can optimise the design to train the ANFIS network with only one case with the smallest rs and a larger p for all types of QPD rotators with any value of rs and p. This demonstrates the potential industrial application of the proposed method.The cover image is based on the Article ANFIS-based controlled spherical rotator with quadrant photodiode to improve position detection accuracy by Bing-Yuh Lu et al., https://doi.org/10.1049/ote2.12127.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 5","pages":"146-156"},"PeriodicalIF":2.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0