Iet Optoelectronics最新文献_第2页

Elucidations of electronic and optical properties of the w-ZnCh (Ch=O, S and Se) compounds: Insights from Ab-initio calculations and spectroscopy measurements w-ZnCh （Ch=O， S和Se）化合物的电子和光学性质的阐明：来自从头算和光谱测量的见解

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 影响海缆系统中空分复用光纤广泛部署和商业化的条件

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 超低损耗2芯光纤，用于扩大海底电缆容量

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

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-07-22 DOI: 10.1049/ote2.12124

Jianhua He, Yueying Zhan, Haoyuan Pan, Hui Peng

引用次数: 0

Continuous wave operation of broad area and ridge waveguide laser diodes at 626 nm 626 纳米波长下宽面积波导和脊波导激光二极管的连续波运行

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-07-21 DOI: 10.1049/ote2.12125

Felix Mauerhoff, Oktay Senel, Hans Wenzel, André Maaßdorf, Jos Boschker, Johannes Glaab, Katrin Paschke, Günther Tränkle

引用次数: 0

Amplification technology for spatial division multiplexing signals transmitted using multicore fibres 使用多芯光纤传输的空间分割多路复用信号的放大技术

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-07-16 DOI: 10.1049/ote2.12123

Hitoshi Takeshita

{"title":"Amplification technology for spatial division multiplexing signals transmitted using multicore fibres","authors":"Hitoshi Takeshita","doi":"10.1049/ote2.12123","DOIUrl":"10.1049/ote2.12123","url":null,"abstract":"Amplification technologies needed for spatial division multiplexing (SDM) signal transmission have been reported, especially focusing on submarine systems, which have stricter requirements than terrestrial ones. As the first step of a large-scale commercialisation, 2-core un-coupled (UC) fibre production has already been announced. However, optical amplifiers for SDM signals are still under investigation because SDM amplifiers have various architectural possibilities, depending on the requirements to be considered in designing systems. The multicore erbium-doped fibre amplifier (MC-EDFA) architecture is classified from the viewpoint of the number of erbium-doped fibre (EDF) cores and its pumping method. Core pumped MC-EDFA is more compatible with the conventional single-core fibre (SCF)- based system and more mature than cladding pumped MC-EDFA. However, cladding pumped MC-EDFA has a unique feature of collective amplification of all cores in a single multicore fibre (MCF) and the potential of large-scale integration of amplification cores in a single package. For a feasibility study, a C-band 19-core cladding pumped MC-EDFA prototype is fabricated using a 19-core isolator. A half volume of the equivalent conventional single-core (SC-) EDFA is successfully demonstrated. One unique feature of UC-MCF is bidirectional (BD-) transmission using a single UC-MCF. Signal transmission direction can differ from core to core. This feature is useful for efficiently accommodating traffic of asymmetric communication data and expanding transmission capacity at a constant transmission distance. A C-band 7-core cladding pumped BD-MC-EDFA prototype is fabricated for the bidirectional MCF transmission line. Experimental results show transmission capacity was expanded by 17% using the prototype when bidirectional signal assignment was adapted. Towards practical use, optical components suitable for MC-EDFA need to be developed to draw out potential advantages of SDM technologies.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 6","pages":"179-187"},"PeriodicalIF":2.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12123","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141832625","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 analysis of reducing outage probability using deep interleaving for long-distance free space optical systems 利用深度交织降低长距离自由空间光学系统中断概率的实验分析

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-07-16 DOI: 10.1049/ote2.12122

Yunfan Chang, Shanyong Cai, Liqian Wang, Haojie Zhang, Zhiguo Zhang

引用次数: 0

Application of machine learning for signal recognition in distributed fibre optic acoustic sensing technology 在分布式光纤声学传感技术中应用机器学习进行信号识别

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-06-21 DOI: 10.1049/ote2.12120

Yage Zhan, Lirui Liu, Kehan Li

{"title":"Application of machine learning for signal recognition in distributed fibre optic acoustic sensing technology","authors":"Yage Zhan, Lirui Liu, Kehan Li","doi":"10.1049/ote2.12120","DOIUrl":"https://doi.org/10.1049/ote2.12120","url":null,"abstract":"Coherent Rayleigh scattering-based distributed fibre optic sensing technology enables real-time acquisition of vibration and acoustic information along the optical fibres. However, the complexity of monitoring environments often leads to false alarms and missed detections during the process of information source identification with distributed acoustic sensing (DAS). Therefore, it becomes crucial to effectively extract meaningful signal features and perform accurate pattern recognition in the presence of external noise disturbance. The authors provide a comprehensive review of signal feature extraction and pattern recognition techniques applied in DAS technology. After introducing the fundamentals of DAS, specific applications are considered, and the following techniques have been analysed and compared: feature extraction algorithms based on wavelet decomposition, feature extraction schemes utilising other decomposition models, traditional recognition classifiers, and neural network-based recognition classifiers using deep learning. The advantages and limitations of each scheme are discussed, along with their potential applications in various scenarios. The aim is to provide insights into the latest technologies in signal processing and pattern recognition for DAS, fostering further advancements in this field.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 4","pages":"81-95"},"PeriodicalIF":2.3,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12120","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967465","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

How can we consider multi-core fibre standard? 如何考虑多芯光纤标准？

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-06-09 DOI: 10.1049/ote2.12119

Kazuhide Nakajima, Takashi Matsui

引用次数: 0