Iet Optoelectronics最新文献_第2页

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

Numerical simulation of a novel high performance solid-state dye-sensitised solar cell based on N719 dye 基于 N719 染料的新型高性能固态染料敏化太阳能电池的数值模拟

IF 2.3 4区计算机科学

Iet Optoelectronics Pub Date : 2024-06-06 DOI: 10.1049/ote2.12118

George G. Njema, Joshua K. Kibet, Nicholas Rono, Chinedu C. Ahia

{"title":"Numerical simulation of a novel high performance solid-state dye-sensitised solar cell based on N719 dye","authors":"George G. Njema, Joshua K. Kibet, Nicholas Rono, Chinedu C. Ahia","doi":"10.1049/ote2.12118","DOIUrl":"10.1049/ote2.12118","url":null,"abstract":"Among the emerging photovoltaic technologies, solid-state dye-sensitised solar cells (ssDSSCs) have attracted considerable interest due to their cost-effective production, adjustable characteristics, and potential for lightweight and flexible applications. Nevertheless, achieving efficiencies comparable to established technologies, such as perovskite and silicon-based solar devices, have proven challenging. Herein, the device structure, Pt/PEDOT: PSS/N719 dye/PC61BM/ITO is investigated theoretically using the solar cell capacitance simulator (SCAPS-1D). Groundbreaking advancement is introduced in ssDSSC design, achieving remarkable theoretical power conversion efficiency of 20.73%, surpassing the performance reported in traditional dye-based solar cell technologies. The model ssDSSC demonstrates an exceptional Fill factor of 86.64%, indicating efficient current collection; along with a modest short-circuit current density (Jsc) of 22.38 mA/cm2 and an impressive open-circuit voltage (Voc) of 1.0691 V, highlighting efficient light absorption and charge separation. Mott–Schottky capacitance analysis and parasitic resistances (series and shunt) have been thoroughly discussed. Despite the fact that only numerical simulation is involved, the proposed ssDSSCs structure gives insights into the fabrication of a highly efficient solar cell that can be injected into the production workflow in order to advance the photovoltaic technology of the solid-state DSSC.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 4","pages":"96-120"},"PeriodicalIF":2.3,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12118","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377279","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

In pursuit of high-fidelity waveguide imaging restoration using deep learning algorithms: A review 利用深度学习算法追求高保真波导成像复原：综述

IF 1.6 4区计算机科学

Iet Optoelectronics Pub Date : 2024-05-22 DOI: 10.1049/ote2.12113

Ruiqi Zhou, Yang Yang, Jiong Xiao, Zihang Liu, Feifei Hao, Jinwei Zeng, Jian Wang

{"title":"In pursuit of high-fidelity waveguide imaging restoration using deep learning algorithms: A review","authors":"Ruiqi Zhou, Yang Yang, Jiong Xiao, Zihang Liu, Feifei Hao, Jinwei Zeng, Jian Wang","doi":"10.1049/ote2.12113","DOIUrl":"10.1049/ote2.12113","url":null,"abstract":"Waveguide imaging is considered as one of the most important and widely used techniques in biomedical endoscopic applications. Recently, many attempts have been made to develop ever miniaturised in vivo imaging devices for minimally invasive clinical inspections. However, miniaturisation implies using a smaller optical aperture waveguide, which may introduce pixilation artefacts and pixel-to-pixel distortion to deteriorate overall imaging quality. To overcome the constraints imposed by miniaturised waveguides, the deep learning algorithms can be an effective tool to cure the imaging distortion via post-processing, which already had encouraging results in many scenes of automatic machine-learnt imaging restoration. The authors introduce the waveguide imaging transmission and the restoration algorithms, and then discuss their possible combinations. The results show that the integration of advanced waveguides and optimised algorithms can achieve unprecedented imaging restoration than before. In the future, in order to fill the need for high-quality reconstructed images, we should not only improve ability of software to optimise restoration algorithms but also correspondingly concern hardware progress in waveguides. The practical sense of it is to help researchers better master and take advantage of these combinations to make next generation high-fidelity endoscopes.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 3","pages":"49-62"},"PeriodicalIF":1.6,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12113","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141109662","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

Investigating changes in the electric field profiles of transverse modes in fibres due to bending 研究纤维中横向模式的电场分布因弯曲而发生的变化

IF 1.6 4区计算机科学

Iet Optoelectronics Pub Date : 2024-05-15 DOI: 10.1049/ote2.12117

Sajjad Vazeerpour, Mahdi Shayganmanesh, Davoud Dorranian

引用次数: 0

Research on vibration pattern recognition based on phase-sensitive optical time domain reflectometry and voting fully convolution neural networks 基于相敏光学时域反射测量和投票全卷积神经网络的振动模式识别研究

IF 1.6 4区计算机科学

Iet Optoelectronics Pub Date : 2024-05-09 DOI: 10.1049/ote2.12116

Yunhong Liao, Ke Li, Yandong Gong

引用次数: 0

Point-to-point intensity modulation and direct detection flexible transceivers incorporating cascaded inverse fast fourier transform/fast fourier transform-based multi-channel aggregation/de-aggregation techniques 采用级联反快速傅里叶变换/基于快速傅里叶变换的多通道聚合/去聚合技术的点对点强度调制和直接检测柔性收发器

IF 1.6 4区计算机科学

Iet Optoelectronics Pub Date : 2024-02-27 DOI: 10.1049/ote2.12115

Lin Chen, Xinyu Wang, Wei Jin, Xiaoyu Huang, Gang Yang, Mingyang Jiang, Jianming Tang

{"title":"Point-to-point intensity modulation and direct detection flexible transceivers incorporating cascaded inverse fast fourier transform/fast fourier transform-based multi-channel aggregation/de-aggregation techniques","authors":"Lin Chen, Xinyu Wang, Wei Jin, Xiaoyu Huang, Gang Yang, Mingyang Jiang, Jianming Tang","doi":"10.1049/ote2.12115","DOIUrl":"10.1049/ote2.12115","url":null,"abstract":"Point-to-point (P2P) flexible transceivers are the key technical enabler to cost-effectively offer fast, dynamic, and ‘just-the-right-size’ ultra-dense P2P connectivity for various applications including remote equipment control and distributed fibre networks. However, existing flexible transceivers originally designed for hub-and-spoke traffic patterns are sub-optimal. To effectively address such technical issue, a P2P flexible transceiver incorporating a cascaded inverse fast fourier transform/fast fourier transform-based multi-channel aggregation/de-aggregation technique and analogue in-phase and quadrature (IQ) mixers is proposed and numerically evaluated in a 56Gbps@20 km intensity modulation and direct detection transmission system. The proposed P2P flexible transceivers not only support adaptive and flexible variations in both channel count and channel line rate but also offer additional physical layer network security.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 1-2","pages":"41-47"},"PeriodicalIF":1.6,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139981723","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

Formation of optical planar waveguides on fused quartz by MeV ion implantation 通过 MeV 离子注入在熔融石英上形成光学平面波导

IF 1.6 4区计算机科学

Iet Optoelectronics Pub Date : 2024-02-13 DOI: 10.1049/ote2.12114

José-Miguel Zarate-Reyes, Erick Flores-Romero, Luis Rodríguez-Fernández, Yuriy Kudriavtsev, Juan-Carlos Cheang-Wong

{"title":"Formation of optical planar waveguides on fused quartz by MeV ion implantation","authors":"José-Miguel Zarate-Reyes, Erick Flores-Romero, Luis Rodríguez-Fernández, Yuriy Kudriavtsev, Juan-Carlos Cheang-Wong","doi":"10.1049/ote2.12114","DOIUrl":"10.1049/ote2.12114","url":null,"abstract":"The optical losses and the refractive index change of optical planar waveguides formed by MeV ion implantation were correlated with the experimental ion implantation parameters. Direct ion implantation was performed by means of carbon, silicon and copper ion beams impinging on the substrate surface at normal incidence. The ions were accelerated at energies ranging from 3 to 12 MeV with fluences varying from 1 × 1012 to 2 × 1016 ion/cm2, according to the type of implanted ion. The modification of the substrate refractive index due to the ion irradiation-induced damage was evaluated using the prism coupler method, and the refractive index profiles were determined by means of a reconstruction method using a multilayer structure approximation. The guiding properties of the waveguides were analysed using the fibre-coupling technique to determine both the optical transmission and transversal modes at 635 nm. The main practical relevance of our research is the obtention of high-quality waveguides at low current density MeV ion implantation (≤80 nA/cm2) without post-implantation annealing.","PeriodicalId":13408,"journal":{"name":"Iet Optoelectronics","volume":"18 1-2","pages":"32-40"},"PeriodicalIF":1.6,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ote2.12114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139728276","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