Iet Optoelectronics最新文献

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

On conditions influencing widespread deployment and commercialisation of space division multiplexing optical fibres in submarine cable systems

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-09-11 DOI: 10.1049/ote2.12121

John D. Downie, Sergejs Makovejs, Pushkar Tandon, Kevin Bennett, Matthew Tuggle, Douglas Butler, Hector DePedro, Yongmin Jung

引用次数: 0

Ultra-low loss 2-core fibre for expanding submarine cable capacity

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-08-05 DOI: 10.1049/ote2.12126

Takemi Hasegawa

引用次数: 0

An unsupervised coherent receiver digital signal processing algorithm based on spectral clustering with no data preamble 基于无数据前导频谱聚类的无监督相干接收器数字信号处理算法