Optical Fiber Technology最新文献_第6页

Highly accurate phase demodulation algorithm for white light interference 高精度白光干涉相位解调算法

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-24 DOI: 10.1016/j.yofte.2025.104248

Jiyang Li , Jinhui Shi , Dong Guang , Shenglai Zhen , Jun Zhu , Liang Lu , Cheng Zuo , Xuqiang Wu , Jiatong Luo , Benli Yu

{"title":"Highly accurate phase demodulation algorithm for white light interference","authors":"Jiyang Li , Jinhui Shi , Dong Guang , Shenglai Zhen , Jun Zhu , Liang Lu , Cheng Zuo , Xuqiang Wu , Jiatong Luo , Benli Yu","doi":"10.1016/j.yofte.2025.104248","DOIUrl":"10.1016/j.yofte.2025.104248","url":null,"abstract":"<div><div>In traditional white light interference phase demodulation technology (T-WLPDT), the accuracy issue caused by delay time has always existed. To control the distortion degree within a certain range, it is inevitable that operating bandwidth is necessary to be sacrificed. In this paper, the ratio between demodulation signal output by T-WLPDT and true signal is derived and formulated as compensation factor (CF). CF is then applied to compensate for the spectral signal output by T-WLPDT, thereby achieving high-accuracy demodulation and expansion of operating bandwidth. The experiment result shows that compared to T-WLPDT, the bandwidth of compensated white light interference phase demodulation technology (C-WLPDT) has extended 16 dB (6.28 times), with the distortion limited to 1.69 %. Besides, the study analyzed the advantages of phase compression of white light interference in demodulating low-frequency large phase-amplitude signals. When demodulating signals of 100 Hz, C-WLPDT presents 41 dB (108.1 times) phase compression, enabling measurement of signals with larger phase-amplitude than narrow linewidth laser phase demodulation technology (NLPDT). The work is of great significance to improve measurement accuracy of white light interference, and promotes it more applicable to the sensing field. Meanwhile, the phase compression performance of C-WLPDT provides an idea to detect low-frequency large phase-amplitude signals.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104248"},"PeriodicalIF":2.6,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869078","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

Effect of the anisotropy on the properties of optical pulses in birefringent optical fibers: Coexistence of the Ordinary and Extraordinary pulse modes 双折射光纤中各向异性对光脉冲特性的影响：普通和特殊脉冲模式的共存

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-20 DOI: 10.1016/j.yofte.2025.104222

Hatou-Yvelin Donkeng , William Kamgaing Mabou , Désiré Ndjanfang , Maxim Idriss Meli Tametang , David Yemélé

{"title":"Effect of the anisotropy on the properties of optical pulses in birefringent optical fibers: Coexistence of the Ordinary and Extraordinary pulse modes","authors":"Hatou-Yvelin Donkeng , William Kamgaing Mabou , Désiré Ndjanfang , Maxim Idriss Meli Tametang , David Yemélé","doi":"10.1016/j.yofte.2025.104222","DOIUrl":"10.1016/j.yofte.2025.104222","url":null,"abstract":"<div><div>The propagation of polarized compact bright (CB) optical pulses in birefringents optical fibers is examined by focusing on the nonlinear response function of the fiber. The coupled nonlocal nonlinear Schrödinger (CNNLS) equations that include both the Kerr and the nonlocal nonlinearities, governing the simultaneous propagation of the ordinary <span><math><mrow><mo>(</mo><mi>o</mi><mo>)</mo></mrow></math></span> and extraordinary <span><math><mrow><mo>(</mo><mi>e</mi><mo>)</mo></mrow></math></span> pulse modes in nonlinear nonlocal birefringent optical fibers is introduced. This equation takes into account the interaction between the <span><math><mi>o</mi></math></span> and the <span><math><mi>e</mi></math></span> pulse modes, which has received little attention in the literature. Analytical investigations showed that in the zero-dispersion regime, the fiber admits fast and slow modes CB pulses. These CB pulses are ultra-short pulses (that is pulses with width <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>≪</mo><mn>5</mn><mi>p</mi><mi>s</mi></mrow></math></span>) pulses exhibiting finite supports outside of which they vanish identically and whose formation requires a delicate balance between the nonlinearity and nonlocality of the fiber. We finally showed that the state of polarization of an input polarized optical pulse varies in the fiber during propagation due to the phase birefringence. The results were checked through numerical simulations.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104222"},"PeriodicalIF":2.6,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850557","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

Physical-layer secure key distribution for dynamic fiber links using transfer learning 基于迁移学习的动态光纤链路物理层安全密钥分配

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-20 DOI: 10.1016/j.yofte.2025.104239

Yuhao Zhong , Jian Hu , Yingxue Liu , Xinran Huang , Zhi Chai , Mingye Li , Liuming Zhang , Jing Wen , Xuelin Yang

引用次数: 0

CNN-based multiplexed optical fiber sensors for multi-load mapping on 2D structures 基于cnn的多路光纤传感器在二维结构上的多载荷映射

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-20 DOI: 10.1016/j.yofte.2025.104231

Vinicius de Carvalho, Victor Hugo Martins, Walter Oswaldo C. Flores, Marcia Muller, José Luís Fabris, André Eugenio Lazzaretti

{"title":"CNN-based multiplexed optical fiber sensors for multi-load mapping on 2D structures","authors":"Vinicius de Carvalho, Victor Hugo Martins, Walter Oswaldo C. Flores, Marcia Muller, José Luís Fabris, André Eugenio Lazzaretti","doi":"10.1016/j.yofte.2025.104231","DOIUrl":"10.1016/j.yofte.2025.104231","url":null,"abstract":"<div><div>This paper reports the application of a Convolutional Neural Network specifically designed for one-dimensional optical signal processing to determine the magnitude and position of loads acting on a structure instrumented with multiplexed macrobend optical fiber sensors, offering a cost-effective and low complexity alternative for force monitoring solutions. The system effectively localized and quantified one, two, or three simultaneous loads within 16 distinct sensing areas, utilizing only five in-series optical fiber sensors, which were spectrally interrogated in transmission mode. The monitored loads ranged from 1000 to 2000 gf. The use of the Huber loss function allows the model to adaptively predict values associated with regions with or without loads. Experimental results showed an average mean absolute error of 224±65 gf during testing. By applying a straightforward post-processing method for load presence detection in each region, the system achieved average F1 scores ranging from 0.84 to 0.93 across the monitored regions, and an average Hamming score of 0.93. These findings demonstrate the system’s effectiveness in monitoring multiple loads, underscoring the potential of optical fiber sensors and CNNs in sensing applications.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104231"},"PeriodicalIF":2.6,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850727","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

High-energy all-fiber Er-doped femtosecond chirped-pulse amplification system seeded by nonlinear multimodal interference mode-locked fiber laser 非线性多模干涉锁模光纤激光器种子高能全光纤掺铒飞秒啁啾脉冲放大系统

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-20 DOI: 10.1016/j.yofte.2025.104245

H. Ahmad , M.U.M. Ithnahaini , M.Z. Samion , M.K.A. Zaini , M.F. Ismail , L. Bayang , K. Thambiratnam , B. Ortaç

{"title":"High-energy all-fiber Er-doped femtosecond chirped-pulse amplification system seeded by nonlinear multimodal interference mode-locked fiber laser","authors":"H. Ahmad , M.U.M. Ithnahaini , M.Z. Samion , M.K.A. Zaini , M.F. Ismail , L. Bayang , K. Thambiratnam , B. Ortaç","doi":"10.1016/j.yofte.2025.104245","DOIUrl":"10.1016/j.yofte.2025.104245","url":null,"abstract":"<div><div>We report a high-energy femtosecond 1.5 µm all-fiber source based on chirped-pulse amplification (CPA) of soliton pulses generated by a multimodal interference. The erbium-doped mode-locked fiber seed source utilizes a nonlinear multimodal interference-based saturable absorber designed with a single-multi-single (SMS) mode fiber configuration, which can generate femtosecond soliton pulses. A commercially available ultra-high numerical aperture fiber with normal group velocity dispersion stretches the pulses up to a duration of 5.14 ps. These stretched pulses are amplified in pre- and main amplification stages to achieve watts-level average output power. Additionally, single-mode fiber (SMF) effectively compresses the pulses back down to femtosecond duration. The CPA configuration provides output power, pulse width, and repetition rate of 1.34 W, 580 fs, and 14.7 MHz, respectively, measured at a central wavelength of 1563 nm. The CPA performance yields a pulse energy of 91.2 nJ and a peak power of 157 kW. Notably, the system exhibits stable output with a minimal average output power fluctuation of 0.08 dB, indicating a stable laser performance.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104245"},"PeriodicalIF":2.6,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850555","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

Real-World quality of service (QoS) performance in Radio over Fiber (RoF) Networks: Experimental testbed 光纤无线（RoF）网络中的实际服务质量（QoS）性能：实验测试平台

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-20 DOI: 10.1016/j.yofte.2025.104223

R. Mohamad , S.M. Idrus , O. Abuajwa , Z. Yusoff , S. Yaakob , P.N. Ja’afar

{"title":"Real-World quality of service (QoS) performance in Radio over Fiber (RoF) Networks: Experimental testbed","authors":"R. Mohamad , S.M. Idrus , O. Abuajwa , Z. Yusoff , S. Yaakob , P.N. Ja’afar","doi":"10.1016/j.yofte.2025.104223","DOIUrl":"10.1016/j.yofte.2025.104223","url":null,"abstract":"<div><div>The Radio over Fibre (RoF) downlink system has been designed to coexist with the Passive Optical Network (PON) technology, utilising the wavelength division multiplexing (WDM) method to support fibre-to-the-home (FTTH) installations and deliver high-speed broadband services. The system performance must meet the standards set by the European Telecommunication Standard Institute (ETSI) and telecommunications service providers (TSP) requirements. In this paper, new RoF system is designed to complement the PON deployment based on developing optical line terminal-multipoint radio over fibre (OLT-MROF), Radio Access Unit (RAU), Outdoor Unit (ODU), and RoF broadband terminal unit (RoF-ROF-BTU) using the field programmable gate arrays (FPGA). Then, an experimental testbed on the RoF downlink system in a rural area is conducted to evaluate the quality of service (QoS) measurement for high-speed broadband services, including triple-play services (TPSs): data, voice, and video for Internet Protocol Television (IPTV) at 30 Mbps. The setup focuses on three main QoS parameters: audio or video quality, mean opinion score (MOS), voice quality, jitter, and throughput. To monitor the QoS, measurement tools are employed, and data collection is carried out through both active and passive measurement methods, utilising EXFO-FTB test gear and IxChariot. The findings reveal that 88% of the 24 served users received triple-play services, surpassing the standards set by TSP and ETSI in the RoF-WDM-PON downlink system. The approach demonstrates optimal MOS with maintained voice jitter and consistent throughput at a minimum of 18 Mbps, achieving efficient performance and resource utilisation. The results of the trial-based study showed a significant improvement in packet loss, less than 16.67%, and more than 20.9% improvement in throughput compared to the simulation-based benchmark.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104223"},"PeriodicalIF":2.6,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850559","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

Assessing client-side protection impact on C+L+S multi-band optical networks with a GNPy-based planning tool 使用基于gnpy的规划工具评估客户端保护对C+L+S多波段光网络的影响

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-20 DOI: 10.1016/j.yofte.2025.104236

Rodrigo Guerreiro , Luís Cancela , João Rebola

{"title":"Assessing client-side protection impact on C+L+S multi-band optical networks with a GNPy-based planning tool","authors":"Rodrigo Guerreiro , Luís Cancela , João Rebola","doi":"10.1016/j.yofte.2025.104236","DOIUrl":"10.1016/j.yofte.2025.104236","url":null,"abstract":"<div><div>Multi-band (MB) transmission is a solution capable of increasing optical networks capacity and surpassing C-band transmission limitations. However, as more capacity is transported in these new MB networks, survivability and energy consumption issues become more relevant. This work investigates the impact of those issues in C+L+S MB optical networks using a tool based on the Gaussian noise Simulation in Python (GNPy) tool. The routing, modulation format and spectrum assignment (RMSA) algorithm provided in the GNPy tool is improved to take into account both client-side dedicated protection and inter-channel stimulated Raman scattering-Gaussian noise model. The protection level impact on the network performance is assessed by performing several RMSA studies on the German network for different protection levels and two blocking probabilities. Our results indicate that increasing the protection level by 25% leads to an 11% decrease in transported capacity and a 4% increase in spare capacity, with a 1 dBJpTbit increase in energy consumption per Tbit. Also, it is shown that these capacities become approximately stabilized above a 75% protection level. Despite the transported capacity in the C+L+S-band significantly increases compared to the C+L-band scenario, the energy consumption per Tbit remains almost the same in both scenarios.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104236"},"PeriodicalIF":2.6,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850558","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

Simple method for multi-access frequency transfer with remote passive phase noise compensation 远距离无源相位噪声补偿多址频率传输的简单方法

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-17 DOI: 10.1016/j.yofte.2025.104238

Shi Luo, Zhibin Zhang, Shun Wu

引用次数: 0

Traffic flow and speed monitoring based on optical fiber distributed acoustic sensor 基于光纤分布式声传感器的交通流量和速度监测

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-17 DOI: 10.1016/j.yofte.2025.104228

Linlin Wang , Shixin Wang , Peng Wang , Wei Wang , Dezhao Wang , Yongcai Wang , Shanwen Wang

{"title":"Traffic flow and speed monitoring based on optical fiber distributed acoustic sensor","authors":"Linlin Wang , Shixin Wang , Peng Wang , Wei Wang , Dezhao Wang , Yongcai Wang , Shanwen Wang","doi":"10.1016/j.yofte.2025.104228","DOIUrl":"10.1016/j.yofte.2025.104228","url":null,"abstract":"<div><div>In the realm of intelligent transportation systems, accurate and reliable traffic monitoring is crucial. Traditional devices, such as cameras and lidars, face limitations in adverse weather conditions and complex traffic scenarios, prompting the need for more resilient technologies. This paper presents traffic flow monitoring method using optical fiber-based distributed acoustic sensors (DAS). An innovative vehicle trajectory extraction algorithm is proposed to derive traffic flow statistics. In the processing of optical fiber waterfall diagrams, Butterworth low-pass filter and peaks location search algorithm are employed to determine the entry position of vehicles. Subsequently, line-by-line matching algorithm is proposed to effectively track the trajectories. Experiments were conducted in highway, tunnel and city scenarios. Visualizations show that our approach not only extracts vehicle trajectories more accurately than the classical Hough and Radon transform-based methods and MUSIC beamforming algorithm, but also facilitates the calculation of traffic flow information using the low-cost acoustic sensors. It provides a new reliable means for traffic flow monitoring which can be integrated with existing methods like vision-based method.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104228"},"PeriodicalIF":2.6,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839574","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

Optically powered heterodyne modulated sub-THz over fiber using DP-16QAM at 100G in the scenario of ITU-T standard G.9804 for 6G fronthaul 在ITU-T标准G.9804用于6G前传的场景中，使用DP-16QAM在100G光纤上进行光动力外差调制亚太赫兹

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2025-04-16 DOI: 10.1016/j.yofte.2025.104241

Harpreet Kaur , Simranjit Singh , Ranjit Kaur

{"title":"Optically powered heterodyne modulated sub-THz over fiber using DP-16QAM at 100G in the scenario of ITU-T standard G.9804 for 6G fronthaul","authors":"Harpreet Kaur , Simranjit Singh , Ranjit Kaur","doi":"10.1016/j.yofte.2025.104241","DOIUrl":"10.1016/j.yofte.2025.104241","url":null,"abstract":"<div><div>This article presents hybridization of data signal at the sub-terahertz (sub-THz) band and power signal together upon single mode fiber with concern of 6G fronthaul. Emerging technologies power signal and data at THz-spectrum over same fiber, makes it innovative under 6G domains. It offers novel fronthaul structure to serve applications like holographic-communication, quantum-computing, wide-bandwidth, reliability, sensing & imaging, etc. Digital technique dual-polarization 16-quadrature amplitude modulation(DP-16QAM) is used at 100Gbps passive optical network(100G-PON) that sends the data signal by a sub-THz spectrum that gives speed to the signal whereas power signal is examined at 100mW-1000mW that increase the energy efficiency at wavelength 850 nm. The wavelength plan 1340–1344 nm is used for transmission under the international telecommunication union-telecommunications(ITU-T) standard series-G.9804. Dense wavelength division multiplexing(DWDM) architecture is used to send the data signal at 160 GHz that presents sub-THz over fiber. To generate sub-THz, heterodyne modulation technique is used. The outcomes are examined and validated with help of error vector magnitude(EVM) near 4 %, error-rate around 10<sup>−8</sup> to 10<sup>−14</sup>, dots on the constellation figure for X and Y-polarization, as well as noise that shows together that proposed architecture can be compatible towards 6G fronthaul networks. PoF decreases complexities and installation cost of 6G fronthaul networks, and energy consumption and reduces maintenance expenses of PON extenders. It enhances signal-recovery and boosts signal in remote area which makes it fascinating. Apart from thigh-speed data reception, a sufficient power level is received at receiver side which can power antenna units and IoT devices.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104241"},"PeriodicalIF":2.6,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835108","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