Optical Fiber Technology最新文献_第10页

High energy, dual-wavelength Q-switched Er-doped fiber laser by Ga:ZnO nanoparticle saturable absorber 采用 Ga:ZnO 纳米粒子可饱和吸收体的高能量、双波长 Q 开关掺铒光纤激光器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-08-01 DOI: 10.1016/j.yofte.2024.103931

Ahmed Shakir Al-Hiti, O.R. Alobaidi

引用次数: 0

Investigating various physical representations of Q-switched saturable absorbers using Green-Synthesized silver nanoparticles 利用绿色合成银纳米粒子研究 Q 开关可饱和吸收器的各种物理表示方法

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-08-01 DOI: 10.1016/j.yofte.2024.103915

N.U.H.H. Zalkepali , T.J. Sang , T.J. Xuan , A.Z.M. Zamri , N.N.H.E.N. Mahmud , K.L. Mun , N.A. Awang

{"title":"Investigating various physical representations of Q-switched saturable absorbers using Green-Synthesized silver nanoparticles","authors":"N.U.H.H. Zalkepali , T.J. Sang , T.J. Xuan , A.Z.M. Zamri , N.N.H.E.N. Mahmud , K.L. Mun , N.A. Awang","doi":"10.1016/j.yofte.2024.103915","DOIUrl":"10.1016/j.yofte.2024.103915","url":null,"abstract":"<div><p>We successfully investigate the generation of Q-switched pulses utilizing two distinct forms of silver nanoparticles (AgNPs): AgNPs thin film and AgNPs powder. Employing a green synthesis approach with AgNO3 and Oolong tea extract, AgNPs were fabricated as saturable absorbers (SAs) for Q-switching. The AgNPs thin film SA exhibited a remarkable repetition rate of 79.53 kHz, coupled with a pulse width of 2.38 µs and a pulse energy of 1.08 nJ. In contrast, AgNPs powder achieved a repetition rate of 40.53 kHz, a pulse width of 3.33 µs, and a pulse energy of 2.03 nJ. Notably, the AgNPs thin film demonstrated superior stability with a signal-to-noise ratio (SNR) of 55.07 dB compared to the powder’s SNR of 50.65 dB. These findings underscore the significant impact of the physical form of saturable absorbers on pulse characteristics, offering promising avenues for diverse applications in telecommunication, optical fiber sensors, and material processing. The novelty lies in comparing different physical forms of AgNPs as saturable absorbers, revealing distinct performance metrics and highlighting their potential for various technological applications.</p></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141951870","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

Accuracy compensation method for 2D curve reconstruction of torsional FBG shape sensor of scraper conveyor 刮板输送机扭转 FBG 形状传感器二维曲线重建的精度补偿方法

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-31 DOI: 10.1016/j.yofte.2024.103922

Yang Song , Xinqiu Fang , Ningning Chen , Haotian Feng , Dexing He , Minfu Liang , Gang Wu , Yang Wu

引用次数: 0

Highly sensitive fiber bragg grating accelerometer with low resonant frequency 低谐振频率的高灵敏光纤布拉格光栅加速度计

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-31 DOI: 10.1016/j.yofte.2024.103919

Teng Guo, Hao Song, Sha Sha, Cunxia Li, Ming Xu

引用次数: 0

A >20-W, linearly polarized single-frequency continuous-wave all-fiber laser at ∼1540 nm 波长 ∼1540 nm、功率大于 20 W 的线性偏振单频连续波全光纤激光器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-31 DOI: 10.1016/j.yofte.2024.103932

Wenxiang Xie , Xinxiu Zhou , Cong Cao , Ke Wen , Guanzhong Li , Zhan Ban , Tianli Feng , Mingliang Xiong , Jingcheng Shang

{"title":"A >20-W, linearly polarized single-frequency continuous-wave all-fiber laser at ∼1540 nm","authors":"Wenxiang Xie , Xinxiu Zhou , Cong Cao , Ke Wen , Guanzhong Li , Zhan Ban , Tianli Feng , Mingliang Xiong , Jingcheng Shang","doi":"10.1016/j.yofte.2024.103932","DOIUrl":"10.1016/j.yofte.2024.103932","url":null,"abstract":"<div><p>We have developed both theoretically and experimentally an all polarization-maintaining fiber-based master oscillator power amplifier (MOPA) system, which allows for amplifying the single-frequency continuous-wave (CW) fiber laser to >20 W without compromising the laser intensity noise (−110 dBc/Hz@ relaxation oscillation peak) at the specific wavelength of ∼1540 nm. The experimental results agree well with the simulated results. To the best of our knowledge, this is the first demonstration of a ∼1540-nm single-frequency all fiber laser and reaching such a high-power level. The amplified laser features a narrow linewidth of ∼1.4 kHz and a spectral side-mode-suppression ratio of >38 dB, even as the laser wavelength is tuned from 1538.216 nm to 1540.616 nm. It is believed to be the narrowest laser linewidth realized in the <1550-nm wavelength band of an Erbium-Ytterbium co-doped fiber MOPA system. The all polarization-maintaining configuration of the MOPA ensures the amplified laser linearly polarized with the polarization extinction ratio of >22 dB and power root mean square fluctuations of <0.2 %@1h. This high-performance single-frequency fiber laser is expected to be an ideal pump source in the spin-exchange relaxation-free (SERF)-based atomic sensors after second harmonic generation.</p></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141887326","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

Tapered fiber optic sensor for arterial pulse wave monitoring 用于动脉脉搏波监测的锥形光纤传感器

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-30 DOI: 10.1016/j.yofte.2024.103929

Sang-Woo Seo, Noguosadia Egharevba

引用次数: 0

Stabilization of super coherent frequency transfers via amplifier cascade balancing 通过放大器级联平衡稳定超相干频率传输

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-29 DOI: 10.1016/j.yofte.2024.103910

Martin Šlapák , Ondřej Havliš , Rudolf Vohnout , Josef Vojtěch , Martin Čížek

{"title":"Stabilization of super coherent frequency transfers via amplifier cascade balancing","authors":"Martin Šlapák , Ondřej Havliš , Rudolf Vohnout , Josef Vojtěch , Martin Čížek","doi":"10.1016/j.yofte.2024.103910","DOIUrl":"10.1016/j.yofte.2024.103910","url":null,"abstract":"<div><p>This paper introduces a novel metric and approach for link quality measurement and a new algorithm for human-intervention-free optical link balancing, specifically designed for optical fiber transfer systems that require bidirectional amplification. Bidirectional amplification, essential for reciprocal optical paths to compensate fluctuations for new non-data applications like accurate time transfer and ultrastable coherent frequency transfer, introduces complexities such as feedback loops and phase inconsistencies. Our work ensures that amplified signals maintain precise time alignment, a critical aspect of any bidirectionally amplified system.</p><p>Amplification processes often introduce phase noise and frequency fluctuations, which are disruptive, especially for non-data applications, necessitating a delicate balance between amplification and signal integrity. Our approach aims to provide a comprehensive solution for these complexities.</p><p>Our algorithm’s effectiveness is demonstrated through rigorous testing on real-world infrastructure. It successfully balances several optical links, indicating robustness when handling bidirectional amplification complexities. Furthermore, an extended use case involving a cascade of four balanced optical amplifiers demonstrates the algorithm’s efficiency in more intricate scenarios.</p><p>This concept has been successfully deployed and tested on one fiber segment of the Czech national research and education network. We discuss the substantial benefits observed in the newly balanced links, highlighting significant advancements in mitigating the challenges of bidirectional amplification. Our findings represent a significant step forward in optical network technologies, addressing critical issues in modern open optical communication systems.</p></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1068520024002554/pdfft?md5=3885a6a9838f8ece37b22ded68a88d2d&pid=1-s2.0-S1068520024002554-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141886508","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

Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination 使用赫兹线宽激光的净化技术，用于基于光纤的频率相干传播

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-28 DOI: 10.1016/j.yofte.2024.103923

Dan Wang , Jie Liu , Dongdong Jiao , Qi Zang , Xiang Zhang , Qian Zhou , Yucan Zhang , Guanjun Xu , Ruifang Dong , Tao Liu , Shougang Zhang

{"title":"Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination","authors":"Dan Wang , Jie Liu , Dongdong Jiao , Qi Zang , Xiang Zhang , Qian Zhou , Yucan Zhang , Guanjun Xu , Ruifang Dong , Tao Liu , Shougang Zhang","doi":"10.1016/j.yofte.2024.103923","DOIUrl":"10.1016/j.yofte.2024.103923","url":null,"abstract":"<div><p>We propose a purification relay station for optical frequency dissemination over long-distance communication fiber links particularly in complex environments. This technique addresses the challenge of phase noise suppression limitation due to dissemination delay in laser traversing fiber links. Utilizing a cavity-stabilized hertz-linewidth laser, we synchronized the phase noise with that of the signal received from the previous link within a 10 Hz bandwidth. Beyond this range, the phase noise followed the hertz-linewidth laser, decreasing from 20 rad to 6 rad. Furthermore, to ensure continuous coherence and stability of the disseminated laser, the data processing based on FPGA was employed to eliminate phase cycle slips in the previously disseminated optical frequency. We applied this technique to the optical frequency disseminated along with a 106 km communication fiber link. After optical frequency purification, the fractional frequency instability at a 1 s averaging time is reduced by a factor of three. Additionally, with the elimination of the phase cycle slips, the fractional frequency instability of purified optical frequency scales as <span><math><mrow><mfrac><mn>1</mn><mi>τ</mi></mfrac></mrow></math></span> which matches with a signal dominated by phase-modulated white noise. At a 10,000 s averaging time, the purified optical frequency achieves a stability of 8.43 × 10<sup>−19</sup>, representing a reduction of two orders of magnitude compared to that of the previously disseminated optical frequency. This work establishes the foundation for the development of a nationwide optical frequency dissemination network involving long-distance fiber links in complex environments.</p></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141886592","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

Energy savings in 25G-NGEPON for spatial computing multimedia services based on Vanilla-RNN 基于 Vanilla-RNN 的 25G-NGEPON 空间计算多媒体服务的能源节约

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-25 DOI: 10.1016/j.yofte.2024.103914

Razat Kharga , AliAkbar Nikoukar , I-Shyan Hwang , Hamdireza Goudarzi , Shaghayegh Jafaripanah

{"title":"Energy savings in 25G-NGEPON for spatial computing multimedia services based on Vanilla-RNN","authors":"Razat Kharga , AliAkbar Nikoukar , I-Shyan Hwang , Hamdireza Goudarzi , Shaghayegh Jafaripanah","doi":"10.1016/j.yofte.2024.103914","DOIUrl":"10.1016/j.yofte.2024.103914","url":null,"abstract":"<div><p>Immersive internet usage has increased due to spatial computing technologies like VR, AR, and MR. The phenomena have transformed gaming, entertainment, education, healthcare, and other industries. According to recent studies, emerging access network power utilization in immersive technologies is driving the need for energy-efficient solutions. We present a method of OLT utilizing Vanilla-RNN algorithms to efficiently handle ONU sleep cycles, resulting in reduced energy consumption, enhanced network performance, and increased user satisfaction. We present a mathematical formulation of the Vanilla-RNN model and its usage for forecasting optimal sleep durations for ONUs in the 25G-NGEPON. This study further explores the utilization of immersive technology to enhance user experiences and network efficiency by integrating AI and ML in access networks. A proposed novel dynamic bandwidth technique in spatial computing multimedia (SCM-RNN) ensures both QoS and energy efficiency. The assessment findings indicate that the proposed solution successfully achieves a high energy savings ratio of 28 % without compromising the QoS for spatial computing multi-media service environments.</p></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775899","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

Unique multistable states in periodic structures with saturable nonlinearity 具有可饱和非线性的周期性结构中的独特多稳态

IF 2.6 3区计算机科学

Optical Fiber Technology Pub Date : 2024-07-24 DOI: 10.1016/j.yofte.2024.103901

S. Vignesh Raja , A. Govindarajan , M. Lakshmanan

{"title":"Unique multistable states in periodic structures with saturable nonlinearity","authors":"S. Vignesh Raja , A. Govindarajan , M. Lakshmanan","doi":"10.1016/j.yofte.2024.103901","DOIUrl":"10.1016/j.yofte.2024.103901","url":null,"abstract":"<div><p>We report that conventional saturable periodic structures, in sharp contrast to the conventional systems with different nonlinearities which exhibit the typical S- shaped optical bi- and multi-stable states, reveal some unusual and unique nonlinear dynamics. These include the onset of ramp-like optical bistability (OB) and optical multistability (OM) curves which further transit into mixed OM states combining both ramp-like states followed by the S-shaped multistable curves. We also extend this study to another domain of physics, namely parity-time (<span><math><mi>PT</mi></math></span>)- symmetry, by including equal amount of gain and loss into the system which then establishes additional degree of freedom by enabling the investigation into additional two domains which are the unbroken and broken <span><math><mi>PT</mi></math></span>- symmetric regimes. Although these bi- and multi-stable states are unusual and unique, when the frequency detuning is introduced, the revival of S-shaped stable states is possible but only in the presence of unbroken <span><math><mi>PT</mi></math></span>- symmetry. Conversely, the broken <span><math><mi>PT</mi></math></span>- symmetry which usually generates ramp-like multistable states, gives rise to the birth of novel multistable states with a vortex like envelope, (the curve that features simultaneous increase in the critical switch-up and switch-down powers with an increase in the input power) causing a novel structure which has not been reported in the existing literature of different physical systems manifesting multi-stable states.</p></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775897","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