Optical Fiber Technology最新文献

英文中文

Sampling frequency offset compensation scheme for single-carrier signals in coherent systems 相干系统中单载波信号的采样频率偏移补偿方案

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-10-01 DOI: 10.1016/j.yofte.2024.103960

Transceiver sampling frequency offset (SFO) due to imperfections is one of the major factors restricting the transmission performance of the optical fiber coherent systems, especially when signals with high baud rate and therefore requiring higher sampling frequency of sampling devices like DACs or ADCs. In single-carrier signals transmission system, although adaptive clock recovery methods like Gardener or Godard method can compensate sampling error, when SFO is large enough so that one-frame length samples can accumulate to approximate one sample or above, the clock recovery will directly fail due to an extra sample is added or missed. The research of this issue for single-carrier signal is still rare. In this paper, we propose to use a digital interpolation method for single-carrier QAM signals for SFO compensation. The effectiveness of the proposed method is verified by a 32-GBaud 16-QAM dual-polarization 80-km SSMF optical coherent transmission experiment. The experimental results show that with proposed method, up to at least 1000-ppm SFO can be almost compensated to the bit error rate (BER) level as if without SFO. Besides, when using the proposed method, the required optical signal-to-noise ratio (OSNR) can be reduced by about 7 dB to achieve the BER level without SFO.

收发器因不完善而产生的采样频率偏移（SFO）是限制光纤相干系统传输性能的主要因素之一，尤其是当信号的波特率较高，因而需要较高采样频率的采样设备（如 DAC 或 ADC）时更是如此。在单载波信号传输系统中，虽然加德纳法或戈达德法等自适应时钟恢复方法可以补偿采样误差，但当 SFO 足够大，以至于一帧长度的采样可以累积到近似一个采样或更高时，时钟恢复就会因为额外增加或遗漏一个采样而直接失败。针对单载波信号的这一问题的研究还很少。本文提出了一种针对单载波 QAM 信号的数字插值方法，用于 SFO 补偿。通过 32-GBaud 16-QAM 双偏振 80 千米 SSMF 光相干传输实验验证了所提方法的有效性。实验结果表明，使用所提出的方法，至少可补偿 1000ppm 的 SFO，误码率（BER）几乎与无 SFO 时相同。此外，使用建议的方法时，所需的光信噪比（OSNR）可降低约 7 dB，以达到无 SFO 时的误码率水平。

{"title":"Sampling frequency offset compensation scheme for single-carrier signals in coherent systems","authors":"","doi":"10.1016/j.yofte.2024.103960","DOIUrl":"10.1016/j.yofte.2024.103960","url":null,"abstract":"<div><div>Transceiver sampling frequency offset (SFO) due to imperfections is one of the major factors restricting the transmission performance of the optical fiber coherent systems, especially when signals with high baud rate and therefore requiring higher sampling frequency of sampling devices like DACs or ADCs. In single-carrier signals transmission system, although adaptive clock recovery methods like Gardener or Godard method can compensate sampling error, when SFO is large enough so that one-frame length samples can accumulate to approximate one sample or above, the clock recovery will directly fail due to an extra sample is added or missed. The research of this issue for single-carrier signal is still rare. In this paper, we propose to use a digital interpolation method for single-carrier QAM signals for SFO compensation. The effectiveness of the proposed method is verified by a 32-GBaud 16-QAM dual-polarization 80-km SSMF optical coherent transmission experiment. The experimental results show that with proposed method, up to at least 1000-ppm SFO can be almost compensated to the bit error rate (BER) level as if without SFO. Besides, when using the proposed method, the required optical signal-to-noise ratio (OSNR) can be reduced by about 7 dB to achieve the BER level without SFO.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358451","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

A RMSCA algorithm for space division multiplexing elastic optical networks with core switching 带核心交换的空分复用弹性光网络的 RMSCA 算法

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-30 DOI: 10.1016/j.yofte.2024.103978

Space division multiplexing elastic optical networks (SDM-EONs) have attracted much attention due to the advantages of high capacity, flexibility, and spectrum utilization. Space division multiplexing technology enhances the capacity of a single fiber link by using multi-core fiber (MCF). With the support of MCFs, SDM-EONs will become an important form of future optical transmission networks.In order to reduce the blocking rate of the network, this paper proposes a routing, modulation format, spectrum and core allocation (RMSCA) algorithm based on the maximum number of available cores with core switching. The algorithm selects the spectrum block with the most available cores in the entire path for spectrum allocation by using core switching. We perform simulations on two networks, NSF-Net and UBN24, and compare them with the spectrum allocation algorithm with core switching (FF-ISC-RMSCA), which uses first-time adaptation, and the spectrum allocation algorithm with maximum number of cores available (N-ISC-RMSCA), which does not perform core switching. Simulation results show that the proposed algorithm significantly reduces the bandwidth blocking rate and has high spectrum utilization.

空分复用弹性光网络（SDM-EON）因其高容量、灵活性和频谱利用率高的优势而备受关注。空分复用技术通过使用多芯光纤（MCF）提高了单条光纤链路的容量。在 MCF 的支持下，SDM-EON 将成为未来光传输网络的一种重要形式。为了降低网络的阻塞率，本文提出了一种基于最大可用核心数的路由、调制格式、频谱和核心分配（RMSCA）算法。该算法通过核心切换，在整个路径中选择可用核心数最多的频谱块进行频谱分配。我们在两个网络（NSF-Net 和 UBN24）上进行了仿真，并将其与使用首次自适应的带内核切换的频谱分配算法（FF-ISC-RMSCA）和不执行内核切换的带最大可用内核数的频谱分配算法（N-ISC-RMSCA）进行了比较。仿真结果表明，所提出的算法大大降低了带宽阻塞率，并具有较高的频谱利用率。

{"title":"A RMSCA algorithm for space division multiplexing elastic optical networks with core switching","authors":"","doi":"10.1016/j.yofte.2024.103978","DOIUrl":"10.1016/j.yofte.2024.103978","url":null,"abstract":"<div><div>Space division multiplexing elastic optical networks (SDM-EONs) have attracted much attention due to the advantages of high capacity, flexibility, and spectrum utilization. Space division multiplexing technology enhances the capacity of a single fiber link by using multi-core fiber (MCF). With the support of MCFs, SDM-EONs will become an important form of future optical transmission networks.In order to reduce the blocking rate of the network, this paper proposes a routing, modulation format, spectrum and core allocation (RMSCA) algorithm based on the maximum number of available cores with core switching. The algorithm selects the spectrum block with the most available cores in the entire path for spectrum allocation by using core switching. We perform simulations on two networks, NSF-Net and UBN24, and compare them with the spectrum allocation algorithm with core switching (FF-ISC-RMSCA), which uses first-time adaptation, and the spectrum allocation algorithm with maximum number of cores available (N-ISC-RMSCA), which does not perform core switching. Simulation results show that the proposed algorithm significantly reduces the bandwidth blocking rate and has high spectrum utilization.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357932","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

An asymmetric STNS-MZI structure and its applications in temperature and Cd2+ monitoring 不对称 STNS-MZI 结构及其在温度和 Cd2+ 监测中的应用

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-29 DOI: 10.1016/j.yofte.2024.103987

In this paper, an asymmetric fiber Mach-Zehnder interferometer (MZI) is presented and investigated. The proposed asymmetric MZI structure is mainly constructed with thin core fiber (TCF) and no core fiber (NCF), sandwiched between single mode fibers (SMFs). Note that the TCF is spliced with a slight offset such that higher order cladding modes could be effectively exited. The SMF-TCF-NCF-SMF (STNS) structure is adjusted by a finite-difference beam propagation method simulation to achieve an optimal interference spectrum. Temperature monitoring performance is addressed and the calculated sensing resolution is about 0.28 ℃ with high precision of ± 0.3 °C. Moreover, as for the Cd²⁺ monitoring application, the TCF is further etched and then coated with 1-allyl-2-thiourea (ATU) forming cross-linked “-S-Cd-S-” structure. The results show that the resolution of Cd²⁺ could reach 2.37 × 10⁻¹¹mol /L, which shows a four order of magnitude improvement compared with our previous work. Therefore, the proposed asymmetric STNS-MZI interference structure has great potential in future applications.

本文介绍并研究了一种非对称光纤马赫-泽恩德干涉仪（MZI）。所提出的非对称 MZI 结构主要由夹在单模光纤（SMF）之间的薄芯光纤（TCF）和无芯光纤（NCF）构成。需要注意的是，TCF 在拼接时略有偏移，这样可以有效地输出高阶包层模式。SMF-TCF-NCF-SMF (STNS) 结构通过有限差分光束传播方法模拟进行调整，以获得最佳干涉频谱。温度监测性能得到了解决，计算得出的传感分辨率约为 0.28 ℃，精度高达 ± 0.3 ℃。此外，在 Cd2+ 监测应用中，TCF 被进一步蚀刻，然后镀上 1- 烯丙基-2-硫脲（ATU），形成交联的"-S-Cd-S-"结构。结果表明，Cd2+ 的分辨率可达 2.37 × 10-11mol /L，与我们之前的工作相比提高了四个数量级。因此，所提出的非对称 STNS-MZI 干涉结构在未来的应用中大有可为。

引用次数: 0

Temperature extraction from Brillouin sensing based on temporal convolutional networks 基于时序卷积网络的布里渊传感温度提取技术

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-28 DOI: 10.1016/j.yofte.2024.103986

The Brillouin optical time-domain sensing system has become a hot spot of research due to its ability to seamlessly monitor the temperature and strain variations in optical fibers along the line. Given its current limitations of low accuracy and inadequate real-time performance in long-distance monitoring, the Brillouin gain extraction temperature method based on temporal convolutional networks is proposed. On this basis, we established a Brillouin optical time-domain experimental system where comprehensive simulations and tests were conducted to assess the temperature extraction performance under different conditions. Besides, a comparison was made between the system and traditional methods like Lorentz fitting method and extreme learning machine method. The results have suggested that the temporal convolutional network exhibits remarkable measurement accuracy, even in scenarios with low signal-to-noise ratios and large sweep frequency steps.

布里渊光学时域传感系统因其能够无缝监测光纤沿线的温度和应变变化而成为研究热点。鉴于其目前在长距离监测中精度低、实时性不足等局限性，提出了基于时序卷积网络的布里渊增益提取温度方法。在此基础上，我们建立了一个布里渊光学时域实验系统，进行了全面的模拟和测试，以评估不同条件下的温度提取性能。此外，我们还将该系统与洛伦兹拟合法和极端学习机法等传统方法进行了比较。结果表明，即使在信噪比低和扫描频率步长大的情况下，时序卷积网络也能表现出卓越的测量精度。

引用次数: 0

Controlling spatial optical illuminations in optogenetics using an angled optical fiber tip 利用倾斜光纤头控制光遗传学中的空间光学照明

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-28 DOI: 10.1016/j.yofte.2024.103988

The advent of optogenetic tools has revolutionized neuroscience research through its spatiotemporally precise activation of specific neurons by illuminating light on opsin-expressing neurons. A long-standing challenge of in vivo optogenetics remains in delivering light to multiple brain sites simultaneously and maintaining high spatial resolution. Optical fiber-based technologies have been proposed to address these challenges. This work presents the fabrication and characterization of an innovative angled optical fiber probe based on a double-sided angled tip (DSAT) structure. A custom griding setup was used for the reproducible fabrication of a smooth DSAT probe. The designed probe enables precise spatial control of light propagation in brain tissue in which DSAT at angled tip 55° achieving a maximum lateral illumination position of ± 420 μm away from the optical axis and a peak irradiance of 478.5 mW/mm², using a 5 mW of 473 nm laser light. Also, the designed DAST probe was simulated based on ray tracing method and obtained the practical tip angle to evaluate the propagation of light rays emitted from the DSAT at various input optical angles ranging from 0° to 12.5° to predict their irradiance and positions in the modelled tissue. The results indicate the probe generates two elliptical rings each containing two spots with higher optical concentration. Consequently, this device provides four optical spots with irradiance peaks that enable simultaneous illumination of four different locations in the brain tissue. Obtained experiment results are in good agreement with simulation results which can be used for multipoint illumination of brain tissue in optogenetics applications.

光遗传学工具的出现彻底改变了神经科学研究，它通过光照表达蛋白的神经元，在时空上精确激活特定神经元。体内光遗传学的一个长期挑战仍然是如何将光同时传送到多个大脑部位并保持高空间分辨率。为应对这些挑战，人们提出了基于光纤的技术。这项工作展示了基于双面斜角尖端（DSAT）结构的创新型斜角光纤探针的制造和表征。为实现光滑 DSAT 探头的可重复性制造，采用了定制的光栅装置。所设计的探针能对脑组织中的光传播进行精确的空间控制，其中 DSAT 的针尖成 55° 角，最大横向照明位置为距离光轴 ± 420 μm，使用 5 mW 的 473 nm 激光，峰值辐照度为 478.5 mW/mm2。此外，还根据光线追踪方法对设计的 DAST 探头进行了模拟，并获得了实用的尖端角度，以评估 DSAT 在 0° 至 12.5° 的各种输入光学角度下发射的光线的传播情况，从而预测它们在模拟组织中的辐照度和位置。结果表明，探头产生了两个椭圆环，每个环包含两个光浓度较高的光斑。因此，该装置提供了四个具有辐照度峰值的光斑，可同时照射脑组织中的四个不同位置。获得的实验结果与模拟结果非常吻合，可用于光遗传学应用中的脑组织多点照明。

{"title":"Controlling spatial optical illuminations in optogenetics using an angled optical fiber tip","authors":"","doi":"10.1016/j.yofte.2024.103988","DOIUrl":"10.1016/j.yofte.2024.103988","url":null,"abstract":"<div><div>The advent of optogenetic tools has revolutionized neuroscience research through its spatiotemporally precise activation of specific neurons by illuminating light on opsin-expressing neurons. A long-standing challenge of <em>in vivo</em> optogenetics remains in delivering light to multiple brain sites simultaneously and maintaining high spatial resolution. Optical fiber-based technologies have been proposed to address these challenges. This work presents the fabrication and characterization of an innovative angled optical fiber probe based on a double-sided angled tip (DSAT) structure. A custom griding setup was used for the reproducible fabrication of a smooth DSAT probe. The designed probe enables precise spatial control of light propagation in brain tissue in which DSAT at angled tip 55° achieving a maximum lateral illumination position of ± 420 μm away from the optical axis and a peak irradiance of 478.5 mW/mm<sup>2</sup>, using a 5 mW of 473 nm laser light. Also, the designed DAST probe was simulated based on ray tracing method and obtained the practical tip angle to evaluate the propagation of light rays emitted from the DSAT at various input optical angles ranging from 0° to 12.5° to predict their irradiance and positions in the modelled tissue. The results indicate the probe generates two elliptical rings each containing two spots with higher optical concentration. Consequently, this device provides four optical spots with irradiance peaks that enable simultaneous illumination of four different locations in the brain tissue. Obtained experiment results are in good agreement with simulation results which can be used for multipoint illumination of brain tissue in optogenetics applications.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358456","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

Triple parametric sensor based on double-clad fiber and waist-enlarged taper structure 基于双包层纤维和腰部增大锥度结构的三参数传感器

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-26 DOI: 10.1016/j.yofte.2024.103984

In this paper, a three-parameter optic fiber sensor is proposed and demonstrated, which consists of double-clad fiber and a waist-enlarged taper structure. The transmission spectrum of the sensor has multiple independent resonance peaks and different sensitivity responses to different parameters. This optic fiber sensor has a simple structure and high mechanical strength, and the wavelength shift of three resonance peaks can be demodulated, and the coefficient sensitivity matrix can be used to measure multi-parameter measurements simultaneously. The experimental results show that the temperature resolution is 0.665 °C, the strain resolution is 500.812

μ ε

, and the refractive index resolution is 0.003 RIU.

本文提出并演示了一种三参数光纤传感器，它由双包层光纤和增腰锥结构组成。该传感器的传输频谱具有多个独立的共振峰，对不同参数具有不同的灵敏度响应。这种光纤传感器结构简单，机械强度高，可对三个共振峰的波长偏移进行解调，并利用系数灵敏度矩阵同时进行多参数测量。实验结果表明，温度分辨率为 0.665 ℃，应变分辨率为 500.812 με，折射率分辨率为 0.003 RIU。

引用次数: 0

Routing and assignment of wavelengths for bicube in linear array WDM optical networks 线性阵列波分复用光学网络中的双立方波长路由和分配

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-25 DOI: 10.1016/j.yofte.2024.103977

Optical networks leverage the principles of optical communication to transmit data over long distances with high bandwidth and low signal loss. They have lots of applications supporting the backbone of modern communication systems. Wavelength division multiplexing (WDM) enables the simultaneous transmission of many signals with distinct wavelengths via one optical fiber, thereby increasing the overall capacity of the network. One of the significant aspects of designing and managing WDM optical networks involves routing and wavelength assignment (RWA), especially as the demand for high-capacity, low-latency communication continues to grow in recent times. Bicube networks possess many attractive properties, one of the salient features being low diameter as compared to a hypercube. Hence, research using bicube topology is very much prevalent in the last few years. In this paper, we use the technique of congestion to study the RWA problem for bicube in a linear array optical network that uses WDM technology. We also propose algorithms to efficiently compute the minimum number of wavelengths.

光网络利用光通信原理，以高带宽和低信号损耗进行远距离数据传输。光网络应用广泛，是现代通信系统的主干网。波分复用技术（WDM）可通过一根光纤同时传输多个不同波长的信号，从而提高网络的整体容量。设计和管理波分复用光网络的一个重要方面是路由和波长分配（RWA），尤其是随着近来对大容量、低延迟通信的需求不断增长。双立方网络具有许多吸引人的特性，其中一个显著特点是直径小于超立方体。因此，使用双立方体拓扑结构的研究在最近几年非常盛行。在本文中，我们利用拥塞技术研究了使用波分复用技术的线性阵列光网络中的双立方体 RWA 问题。我们还提出了有效计算最小波长数的算法。

引用次数: 0

Dynamic distributed Brillouin sensing based on pump frequency-agile quadrupling modulation 基于泵频率敏捷四倍频调制的动态分布式布里渊传感

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-25 DOI: 10.1016/j.yofte.2024.103979

We propose a dynamic distributed Brillouin sensing based on a frequency-agile quadrupling method. A common low-bandwidth direct digital frequency synthesizer (DDS) is employed to generate a few hundred MHz of frequency-agile pump pulses for Brillouin gain spectrum (BGS) scanning, and polarization multiplexing technology is utilized to further decrease the bandwidth requirement for the frequency-agile microwave signal to one-quarter. This method has low requirements for electronic devices and significantly reduces costs in systems. Static and dynamic measurement capabilities of 2 km fiber were demonstrated experimentally, the vibration frequencies of 183 Hz were measured with a sampling rate of 400 Sa/s.

我们提出了一种基于频率敏捷四倍频方法的动态分布式布里渊传感。利用普通的低带宽直接数字频率合成器（DDS）产生几百兆赫的频率敏捷泵浦脉冲，用于布里渊增益谱（BGS）扫描，并利用极化复用技术将频率敏捷微波信号的带宽要求进一步降低到四分之一。这种方法对电子设备的要求较低，可大大降低系统成本。实验证明了 2 千米光纤的静态和动态测量能力，以 400 Sa/s 的采样率测量了 183 Hz 的振动频率。

引用次数: 0

Research on satellite structural health monitoring based on ultrashort femtosecond grating array and artificial neural network 基于超短飞秒光栅阵列和人工神经网络的卫星结构健康监测研究

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-24 DOI: 10.1016/j.yofte.2024.103981

The safety of spacecraft and satellite in orbit is very important, and structural health monitoring is needed. At present, the existing technology is limited by load and difficult to realize. In this paper, we propose a feasible method to detect and locate the damage of satellite by combining ultrashort femtosecond grating array inscribed on oxide-doped fiber with multilayer artificial neural network. An oxide-doped fiber with high robustness is designed, and ultrashort grating arrays are fabricated on the fiber by femtosecond laser point-by-point writing technology. The effects of impactor velocity and angle on impact response was investigated by numerical simulations and physical experiments. Subsequently, repeated impact experiments were conducted on the satellite to obtain the training dataset and testing dataset for two-dimensional convolutional neural network. The network with symmetric convention kernels has an 88.12% localization accuracy and a better performance in boundary region, and the network architecture with asymmetric convention kernels has a 90.31% accuracy and a better performance in middle region.

航天器和在轨卫星的安全非常重要，需要进行结构健康监测。目前，现有技术受载荷限制，难以实现。本文提出了一种在掺氧化物光纤上刻蚀超短飞秒光栅阵列并结合多层人工神经网络来检测和定位卫星损伤的可行方法。本文设计了一种具有高鲁棒性的掺氧化物光纤，并利用飞秒激光逐点刻写技术在光纤上制作了超短光栅阵列。通过数值模拟和物理实验研究了冲击速度和角度对冲击响应的影响。随后，对卫星进行了反复撞击实验，获得了二维卷积神经网络的训练数据集和测试数据集。采用对称约定内核的网络定位精度为 88.12%，在边界区域的表现更好；采用非对称约定内核的网络结构定位精度为 90.31%，在中间区域的表现更好。

{"title":"Research on satellite structural health monitoring based on ultrashort femtosecond grating array and artificial neural network","authors":"","doi":"10.1016/j.yofte.2024.103981","DOIUrl":"10.1016/j.yofte.2024.103981","url":null,"abstract":"<div><div>The safety of spacecraft and satellite in orbit is very important, and structural health monitoring is needed. At present, the existing technology is limited by load and difficult to realize. In this paper, we propose a feasible method to detect and locate the damage of satellite by combining ultrashort femtosecond grating array inscribed on oxide-doped fiber with multilayer artificial neural network. An oxide-doped fiber with high robustness is designed, and ultrashort grating arrays are fabricated on the fiber by femtosecond laser point-by-point writing technology. The effects of impactor velocity and angle on impact response was investigated by numerical simulations and physical experiments. Subsequently, repeated impact experiments were conducted on the satellite to obtain the training dataset and testing dataset for two-dimensional convolutional neural network. The network with symmetric convention kernels has an 88.12% localization accuracy and a better performance in boundary region, and the network architecture with asymmetric convention kernels has a 90.31% accuracy and a better performance in middle region.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315064","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

Damage detection of Kevlar woven fabric using optical fiber multimode interferometer 利用光纤多模干涉仪检测凯夫拉纤维编织物的损坏情况

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2024-09-24 DOI: 10.1016/j.yofte.2024.103980

Kevlar woven fabric is crucial for the lightweight design of aerospace structures due to its unique advantages. However, it is susceptible to damage during operation, making effective damage detection essential for ensuring structural reliability. Nevertheless, conventional sensors used for damage detection have limitations such as complex manufacturing processes and weight. To address this issue, this paper proposed a simple singlemode-multimode-singlemode (SMS) optical fiber sensor to collect vibration signals and construct a damage recognition model based on natural frequency in order to identify the size of damages in Kevlar woven fabrics. To achieve a highly linear and accurate sensor, a length determination criterion for multimode optical fiber segments based on quasi-image, notch, and transmission spectrum loss was proposed. An optical sensor was fabricated based on this criterion. The feasibility and sensitivity of the sensor for vibration signal measurement were verified by constructing a vibration signal measurement device. An experimental study was conducted to detect damage in Kevlar tapes, where the natural frequency changes measured by the SMS sensor were integrated with an optimized multi-variable gray model for damage size detection. The experimental results indicate that the estimated error in damage size is 0.71%. The damage identification system proposed in this paper offers a simple and cost-effective solution for measuring damage in flexible structures using fiber optic sensors.

凯芙拉纤维编织物因其独特的优势，对航空航天结构的轻量化设计至关重要。然而，它在运行过程中很容易受到损坏，因此有效的损坏检测对于确保结构可靠性至关重要。然而，用于损伤检测的传统传感器存在制造工艺复杂、重量大等局限性。针对这一问题，本文提出了一种简单的单模-多模-单模（SMS）光纤传感器来收集振动信号，并构建基于固有频率的损伤识别模型，以识别凯夫拉编织物的损伤大小。为了实现高度线性和精确的传感器，提出了基于准图像、缺口和传输谱损耗的多模光纤段长度确定标准。根据这一标准制作了一个光学传感器。通过构建振动信号测量装置，验证了传感器用于振动信号测量的可行性和灵敏度。对检测 Kevlar 胶带的损伤进行了实验研究，将 SMS 传感器测量到的固有频率变化与优化的多变量灰色模型相结合，用于损伤大小检测。实验结果表明，损伤大小的估计误差为 0.71%。本文提出的损伤识别系统为使用光纤传感器测量柔性结构的损伤提供了一种简单而经济的解决方案。

{"title":"Damage detection of Kevlar woven fabric using optical fiber multimode interferometer","authors":"","doi":"10.1016/j.yofte.2024.103980","DOIUrl":"10.1016/j.yofte.2024.103980","url":null,"abstract":"<div><div>Kevlar woven fabric is crucial for the lightweight design of aerospace structures due to its unique advantages. However, it is susceptible to damage during operation, making effective damage detection essential for ensuring structural reliability. Nevertheless, conventional sensors used for damage detection have limitations such as complex manufacturing processes and weight. To address this issue, this paper proposed a simple singlemode-multimode-singlemode (SMS) optical fiber sensor to collect vibration signals and construct a damage recognition model based on natural frequency in order to identify the size of damages in Kevlar woven fabrics. To achieve a highly linear and accurate sensor, a length determination criterion for multimode optical fiber segments based on quasi-image, notch, and transmission spectrum loss was proposed. An optical sensor was fabricated based on this criterion. The feasibility and sensitivity of the sensor for vibration signal measurement were verified by constructing a vibration signal measurement device. An experimental study was conducted to detect damage in Kevlar tapes, where the natural frequency changes measured by the SMS sensor were integrated with an optimized multi-variable gray model for damage size detection. The experimental results indicate that the estimated error in damage size is 0.71%. The damage identification system proposed in this paper offers a simple and cost-effective solution for measuring damage in flexible structures using fiber optic sensors.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315480","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

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Optical Fiber Technology

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀