Optical Fiber Technology最新文献_第2页

Tandem structure neural network-based channel power optimization in wavelength-division multiplexing systems 波分复用系统中基于串联结构神经网络的信道功率优化

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-26 DOI: 10.1016/j.yofte.2024.104057

Shengnan Li, Yuchen Song, Xuhao Pang, Yao Zhang, Min Zhang, Danshi Wang

{"title":"Tandem structure neural network-based channel power optimization in wavelength-division multiplexing systems","authors":"Shengnan Li, Yuchen Song, Xuhao Pang, Yao Zhang, Min Zhang, Danshi Wang","doi":"10.1016/j.yofte.2024.104057","DOIUrl":"10.1016/j.yofte.2024.104057","url":null,"abstract":"<div><div>For C-band wavelength-division multiplexing (WDM) transmission systems, achieving balanced output channel power is a practical goal for performance maintenance, given the moderate fiber nonlinearity and sometimes outdated control and monitoring devices in these deployed systems. To accomplish this, we propose a digital twin (DT)-based tandem neural network (NN) structure for optimizing launch power profile. The proposed structure consists of two components: an optimization NN, which generates the optimized launched channel power based on a target output power profile, and a forward DT NN, pre-trained to predict output power profile after multi-span transmission. The proposed method enables fast and efficient launch power optimization on simulated links with arbitrary channel loadings and has been validated using open-source experimental data from links with heterogeneous spans and naked amplifiers. The power profile ripple can be reduced from more than 20 dB to 1.2 dB, providing an effective solution for practical C-band WDM systems.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"89 ","pages":"Article 104057"},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719694","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

Adjustable repetition rate mode-locked fiber laser using a ZnO nanolaminate 使用氧化锌纳米层压板的可调重复率模式锁定光纤激光器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-26 DOI: 10.1016/j.yofte.2024.104064

F.J. Valle-Atilano , H.A Borbón-Nuñez , D. Jáuregui-Vázquez , J.C. Hérnandez-García , R. Rangel-Rojo , H.J. Tiznado-Vázquez , H. Marquez-Becerra , J.M. Sierra-Hérnandez , R.Rojas Laguna , J.M. Estudillo-Ayala

引用次数: 0

Quality evaluation of ballistocardiogram from fiber optic sensors using fuzzy comprehensive evaluation method 利用模糊综合评价法对光纤传感器采集的球形心动图进行质量评价

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-26 DOI: 10.1016/j.yofte.2024.104046

Jianing Ma , Zhiguo Jiang , Shuxia Qian , Bingchen Yan , Xianchao Zhang

{"title":"Quality evaluation of ballistocardiogram from fiber optic sensors using fuzzy comprehensive evaluation method","authors":"Jianing Ma , Zhiguo Jiang , Shuxia Qian , Bingchen Yan , Xianchao Zhang","doi":"10.1016/j.yofte.2024.104046","DOIUrl":"10.1016/j.yofte.2024.104046","url":null,"abstract":"<div><div>Evaluating the quality of ballistocardiogram (BCG) is crucial for enhancing the accuracy of subsequent physiological parameter extraction. The micro-bend fiber optic BCG sensor and fiber Bragg grating BCG sensor are designed and manufactured, and experiments show that they can effectively acquire BCG. A BCG quality evaluation model based on fuzzy comprehensive evaluation is established, which uses four BCG evaluation indicators in time-domain and frequency-domain, including ratio of coefficient of variation, matching degree of J-wave detection, ratio of power spectral density, coefficient of template matching. By analyzing the quality of 800 manually labeled signal samples, the fuzzy membership functions for the four BCG evaluation indicators are determined. Considering the different noise features of various fiber optic sensors, different weight distributions are applied to BCG evaluation indicators for the micro-bend fiber optic BCG sensor and fiber Bragg grating BCG sensor. Applying the quality evaluation model to signals acquired at different times from two types of fiber optic sensors, and classifying them into excellent, average, and poor categories, the accuracy of BCG quality determination for the two types of sensors is 84.50% and 85.25%, respectively.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"89 ","pages":"Article 104046"},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 temperature-insensitive refractive index sensor based on in-line Mach–Zehnder interferometer with micro spindle structures and photonic crystal fibers 基于带有微型纺锤结构和光子晶体光纤的在线马赫-泽恩德干涉仪的温度敏感型折射率传感器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-26 DOI: 10.1016/j.yofte.2024.104039

Jian Geng, Naoto Kishi

{"title":"A temperature-insensitive refractive index sensor based on in-line Mach–Zehnder interferometer with micro spindle structures and photonic crystal fibers","authors":"Jian Geng, Naoto Kishi","doi":"10.1016/j.yofte.2024.104039","DOIUrl":"10.1016/j.yofte.2024.104039","url":null,"abstract":"<div><div>A high-sensitivity refractive index (RI) sensor is proposed and designed, which is an in-line Mach–Zehnder interferometer (IMZI) with a photonic crystal fiber (PCF) and multilevel micro spindle structures fabricated by the arc-discharging and tapering method. To improve the sensitivity, a tapered multimode fiber (MMF) is inserted into the PCF. The performance of RI and temperature detection has been analyzed and discussed. The maximum RI sensitivity of −2958.875 nm/RIU is achieved by detecting the NaCl solution. In addition, the maximum temperature sensitivity is 6.4 pm/<span><math><mrow><msup><mrow></mrow><mrow><mtext>o</mtext></mrow></msup><mtext>C</mtext></mrow></math></span> in the range of 25 <span><math><mrow><msup><mrow></mrow><mrow><mtext>o</mtext></mrow></msup><mtext>C</mtext></mrow></math></span>–65 <span><math><mrow><msup><mrow></mrow><mrow><mtext>o</mtext></mrow></msup><mtext>C</mtext></mrow></math></span>, and the maximum measurement error changes caused by temperature is −0.0170‰/<span><math><mrow><msup><mrow></mrow><mrow><mtext>o</mtext></mrow></msup><mtext>C</mtext></mrow></math></span>. It shows that the sensor is very sensitive to RI yet insensitive to temperature.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"89 ","pages":"Article 104039"},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Design and investigation of a novel optic fiber sensor based on OTDR for land subsidence monitoring 设计和研究基于 OTDR 的新型光纤传感器，用于土地沉降监测

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-26 DOI: 10.1016/j.yofte.2024.104066

Yong Zheng , Lei Liu , Wang Xiao , Chao Yang

{"title":"Design and investigation of a novel optic fiber sensor based on OTDR for land subsidence monitoring","authors":"Yong Zheng , Lei Liu , Wang Xiao , Chao Yang","doi":"10.1016/j.yofte.2024.104066","DOIUrl":"10.1016/j.yofte.2024.104066","url":null,"abstract":"<div><div>The paper presents an innovative fiber optic displacement sensor with a wide and linear measurement range, which capitalizes on the principle of macro-bending loss. The sensor incorporates a single optical fiber that is spirally wound around a non-standard spring, creating a unique sensing element. It functions in tandem with a standard spring, connected in series. The working mechanism of the sensor is thoroughly explained, and a corresponding mathematical model has been developed. An in-depth experimental analysis of the sensor’s performance has been conducted. The findings indicate a strong linear correlation between the displacement measurements and the macro-bending loss of the optical fiber. It boasts a substantial measurement range of 90 mm, with a minimal displacement resolution of 0.150 mm. The sensor also exhibits a maximum hysteresis error of 4.81 % and a maximum repeatability error of 8.62 %. Additionally, a soil drainage model test utilizing two of these sensors to assess their capability in detecting soil compression deformation was performed in details. The experimental results underscore the potential of these sensors to be interconnected on a single optical link, enabling quasi-distributed sensing monitoring. This research paves the way for the promising application of such sensors in real-time monitoring of soil settlement deformation and related phenomena.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"89 ","pages":"Article 104066"},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720307","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

GSADDQN: Combining GraphSAGE and reinforcement learning for routing optimization in software-defined optical transport network GSADDQN：结合 GraphSAGE 和强化学习，优化软件定义光传输网络中的路由选择

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-25 DOI: 10.1016/j.yofte.2024.104059

Junyan Chen , Xinmei Li , Jingwen Wu , Yang Zheng , Wei Xiao

{"title":"GSADDQN: Combining GraphSAGE and reinforcement learning for routing optimization in software-defined optical transport network","authors":"Junyan Chen , Xinmei Li , Jingwen Wu , Yang Zheng , Wei Xiao","doi":"10.1016/j.yofte.2024.104059","DOIUrl":"10.1016/j.yofte.2024.104059","url":null,"abstract":"<div><div>As a result of rapid development of network communication technology, optical transport network (OTN) traffic has also experienced rapid growth in terms of information volume scale, traffic complexity, and spatiotemporal distribution dynamics. Because the OTN traffic demand has complex spatiotemporal fluctuations, the traditional deep reinforcement learning (DRL) algorithm has been applied to the routing optimization of software-defined OTNs. However, the traditional DRL algorithm has problems such as slow convergence, weak generalization ability, and load imbalance when performing routine tasks. To address these issues, we propose a graph sampling and aggregation (GraphSAGE)-based dueling deep Q-network (GSADDQN) algorithm for software-defined OTN routing optimization. First, we design a DRL-based routing decision model to find the best routing strategy for each optical network’s source–destination traffic demand. Second, considering the sparse connection characteristics of optical network nodes, we use sampling neighbors and a deep aggregation mechanism as the neural network model of the Dueling Deep Q-Network (Dueling DQN) algorithm so that the reinforcement learning agent can consciously aggregate important network information and improve the model’s convergence performance and generalization ability. Finally, we design simulation routing experiments based on Gym and evaluate the algorithm’s load balancing and generalization capabilities for different network topologies. The experimental results show that the GSADDQN algorithm has good convergence performance and load balancing ability in routing optimization of optical transmission networks and can generalize new network structures, maintaining good decision-making ability even during network node failures.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"89 ","pages":"Article 104059"},"PeriodicalIF":2.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702080","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

Bulk-structured VTe2 as a novel low-cost saturable absorber for pulsed fiber lasers 用于脉冲光纤激光器的新型低成本可饱和吸收体--块状结构 VTe2

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-24 DOI: 10.1016/j.yofte.2024.104056

Kang Zhang , Yangyang Ren , Ming Feng , Jinyue Xie , Xu Sang , Feng Song

引用次数: 0

Improving the sensitivity of magnetic field sensing system based on fiber mode-lock laser 提高基于光纤锁模激光器的磁场传感系统的灵敏度

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-23 DOI: 10.1016/j.yofte.2024.104049

Jian Xu , Sa Yang , Tigang Ning , Hongwei Yue , Yan Chen , Renlong Zhou , Tao Liao

引用次数: 0

Structural damage identification and experiment based on FBG sensors and PCA-KNN approach 基于 FBG 传感器和 PCA-KNN 方法的结构损伤识别与实验

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-23 DOI: 10.1016/j.yofte.2024.104062

Chuang Li, Li Sun, Zhaoqi Liu, Kai Wang, Weidong Yan

{"title":"Structural damage identification and experiment based on FBG sensors and PCA-KNN approach","authors":"Chuang Li, Li Sun, Zhaoqi Liu, Kai Wang, Weidong Yan","doi":"10.1016/j.yofte.2024.104062","DOIUrl":"10.1016/j.yofte.2024.104062","url":null,"abstract":"<div><div>Structural damage has the characteristics of concealment and low response, therefore, how to improve the accuracy and stability of damage identification has always been a challenge for the researchers. An innovative approach (PCA-KNN) for structural damage identification and anomaly localization was proposed based on monitoring data. Firstly, traditional principal component analysis (PCA) was completed on the monitoring data matrix with taking into account the contribution of error subspaces. Secondly, the sigmoid function was assigned corresponding weights in terms of the sensitivity of the principal components. Finally, the comprehensive differential index was developed with the K-Nearest Neighbor (KNN) algorithm for less noise interference. In terms of sensor monitoring, the wide range FBG strain sensor and FBG tilt sensor were developed to perceive structural mechanical parameters. The innovative approach and sensors were applied to the benchmark model of Base Excited 3-Story Structure and shaking table testing to implement the comprehensive index calculation, which could effectively identify structural damage with abnormal monitoring data from the sensor nearby. Through comparison and analysis, the new technology could promote the ability of quantitative damage identification and localization.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"89 ","pages":"Article 104062"},"PeriodicalIF":2.6,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702077","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

Interlayer air-hole photonic crystal fiber with flat dispersion and three zero dispersion wavelengths for supercontinuum generation 具有平坦色散和三个零色散波长的层间气孔光子晶体光纤，用于超连续发生

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-11-22 DOI: 10.1016/j.yofte.2024.104058

Kefeng Ding , Lihua Ye , Chunguang Lu , Yujie Zhao , Dapeng Yan

{"title":"Interlayer air-hole photonic crystal fiber with flat dispersion and three zero dispersion wavelengths for supercontinuum generation","authors":"Kefeng Ding , Lihua Ye , Chunguang Lu , Yujie Zhao , Dapeng Yan","doi":"10.1016/j.yofte.2024.104058","DOIUrl":"10.1016/j.yofte.2024.104058","url":null,"abstract":"<div><div>This paper proposes an Interlayer Air-hole Photonic Crystal Fiber (IA-PCF) consisting of five air-hole layers with a single material, which means compatibility checking between the core and cladding material need not be required. The optical fiber is designed using COMSOL software. Further more, the dispersion, nonlinearity, effective mode area, and confinement loss characteristics of the proposed IA-PCF structure are numerically analyzed using the finite element method (FEM). The results indicate that the proposed IA-PCF has three zero dispersion wavelengths (ZDW) within 800–2400 nm. Through continuous structural optimization, a flat dispersion optimal IA-PCF with a dispersion fluctuation of ± 2.05 (ps/nm·km) in the range of 1509 nm-1955 nm is obtained. The three zero dispersion wavelengths (ZDW) of the optimal IA-PCF are 1061 nm, 1598 nm, and 1904 nm, respectively. Four input 50 fs pulses both in the normal and anomalous dispersion regimes are explored to analyze the spectral evolution process of SC in a 30 cm lenth IA-PCF. The results indicate that the continuous SC exists in the range of 750 nm-2430 nm at the pump wavelength of 1064 nm with power range of −40 dB. While the continuous broadband SC exists in the range of 1235 nm-3470 nm at the pump wavelength of 1550 nm with power range of −43 dB. In addition, a broadband, flat SC spectrum with a power range of −26.8 dB to −18.6 dB is obtained in the wavelength range of 1331 nm-2315 nm at a pump wavelength of 1080 nm. The IA-PCF provides a new structure and approach for generating a broadband, flat and SC spectrum. The supercontinuum belongs to a wide range of applications in optical communication, optical coherence tomography, optical frequency comb etc.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"89 ","pages":"Article 104058"},"PeriodicalIF":2.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702076","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