Optical Fiber Technology最新文献_第9页

A symbol-level chaotic masking scheme based on three-dimensional constellation flip coding 一种基于三维星座翻转编码的符号级混沌掩蔽方案

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-07 DOI: 10.1016/j.yofte.2025.104460

Xiaoxin Ge , Bo Liu , Jianxin Ren , Yaya Mao , Shuaidong Chen , Xiumin Song , Tingting Sun , Dongxu Zhu , Mengtong Yin , Zining Pan , Wen Han

This paper proposes a symbol-level chaotic masking scheme based on three-dimensional (3D) constellation flip coding. A 3D composite constellation is constructed using regular octagonal diamond shape and regular tetrahedrons as primitive elements. Probabilistic shaping (PS) is introduced to optimize the distribution of constellation points, further enhancing the overall constellation performance. Furthermore, a multi-layer encryption system combining symbol-subcarrier joint perturbation via a 4D multi-phase hyperchaotic system and constellation flip coding encryption is implemented to ensure transmission security. Experimental validation over a 2-km seven-core fiber successfully achieved 59.06 Gb/s orthogonal frequency division multiplexing (OFDM) signal transmission, demonstrating the superior performance of the proposed constellation. At forward error correction (FEC) threshold of 3.8 × 10⁻³, the receiver sensitivity of the proposed 3D composite constellation exhibited gains of 0.3 dB and 1.21 dB compared to the 32-ary 3D constellation constructed with a regular hexahedron and the traditional 32QAM 2D constellation respectively. Additionally, we achieved a 1.02 dB receiver sensitivity gain at an entropy of 4.4 bits/symbol compared to uniformly distributed constellations. The experimental results also show that the encryption at any layer is breached, the system’s bit error rate (BER) can still reach above 0.5. The encrypted signals showed negligible differences from unencrypted ones, with a key space of 10¹⁰⁷ confirming the scheme’s high security and excellent transmission performance. These results highlight its promising potential for future short-reach communication systems.

提出了一种基于三维星座翻转编码的符号级混沌掩蔽方案。以正八边形菱形和正四面体为基元，构建了三维复合星座。引入概率整形（PS）优化星座点分布，进一步提高星座整体性能。在此基础上，利用四维多相超混沌系统实现了符号-子载波联合摄动与星座翻转编码加密相结合的多层加密系统，保证了传输的安全性。实验验证在2 km七芯光纤上成功实现了59.06 Gb/s的正交频分复用（OFDM）信号传输，验证了该星座的优越性能。在前向误差校正（FEC）阈值为3.8 × 10−3时，与正六面体构造的32位三维星座和传统的32QAM二维星座相比，所提出的三维复合星座的接收灵敏度分别提高了0.3 dB和1.21 dB。此外，与均匀分布的星座相比，我们在熵为4.4比特/符号的情况下获得了1.02 dB的接收器灵敏度增益。实验结果还表明，在任何一层的加密被破坏后，系统的误码率（BER）仍然可以达到0.5以上。加密后的信号与未加密信号的差异可以忽略不计，密钥空间为10107，证实了该方案的高安全性和优异的传输性能。这些结果突出了其在未来短距离通信系统中的巨大潜力。

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引用次数: 0

Switching of soliton rain, bunches, and NLP from a thulium/holmium co-doped fiber laser using NPR 用NPR开关铥/钬共掺光纤激光器中的孤子雨、束和NLP

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-11 DOI: 10.1016/j.yofte.2025.104478

Edwin Addiel Espinosa-de-la-Cruz , Manuel Durán-Sánchez , Ulises Alcántara-Bautista , Alejandro Reyes-Mora , Adalid Ibarra-Garrido , Iván Armas-Rivera , Miguel Bello-Jiménez , L.A. Rodríguez-Morales , Baldemar Ibarra-Escamilla

An experimental study on the switching between different multipulse regimes in a Thulium/Holmium-doped fiber (THDF) laser is reported by precise control of polarization controllers. Gaussian and square-shaped noise-like pulses (NLPs) and multiple solitons (MS), including soliton rains (SRs) and soliton bunches (SBs), are generated by the nonlinear polarization rotation technique (NPR) and by employing a double-pass amplifier (DPA) configuration. The study examines the role of polarization controllers and pump power in driving the transitions between these regimes, with a detailed analysis of their temporal and spectral characteristics under different pump powers. To the authors’ knowledge, this is the first demonstration of switching among SR, SB, conventional NLPs, and the coexistence of square-shaped NLP with MS within a hybrid cavity configuration that combines NPR and a DPA. The system operates with a tunable central wavelength ranging from 1984 to 1993 nm, employing a THDF as the gain medium. This investigation provides new insights into the transitions between various multi-pulse regimes and nonlinear dynamics in mode-locked fiber lasers operating near the 2-µm wavelength region.

本文报道了通过精确控制偏振控制器实现掺铥/掺钬光纤激光器多脉冲切换的实验研究。采用非线性极化旋转技术（NPR）和双通放大器（DPA）结构产生高斯和方形类噪声脉冲（nlp）和多孤子（MS），包括孤子雨（SRs）和孤子束（SBs）。该研究考察了极化控制器和泵浦功率在驱动这些状态之间转换中的作用，并详细分析了它们在不同泵浦功率下的时间和光谱特性。据作者所知，这是第一次在SR， SB，传统NLP之间切换，以及在结合NPR和DPA的混合腔结构中方形NLP与MS共存的演示。该系统工作在一个可调谐的中心波长范围从1984到1993 nm，采用THDF作为增益介质。这项研究为在2µm波长区域附近工作的锁模光纤激光器的各种多脉冲状态和非线性动力学之间的转换提供了新的见解。

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引用次数: 0

High-power ytterbium-doped multicore fibers 高功率掺镱多芯光纤

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-04 DOI: 10.1016/j.yofte.2025.104471

Arno Klenke , Cesar Jauregui , Mehran Bahri , Johannes Nold , Stefan Kuhn , Nicoletta Haarlammert , Thomas Schreiber , Jens Limpert

Fiber lasers are nowadays one of the preferred coherent light sources when high average powers up to the multi-kW regime are targeted. Additionally, they are also widely employed for the generation of ultrashort pulses with moderate energy in the mJ-range. However, numerous physical limitations currently hinder a further performance scaling. One way to overcome these limitations is the coherent beam combination of parallel amplifiers. This approach has led to laser systems operating beyond the limits of a single amplifier, albeit at the cost of an increase in footprint and complexity. Amplifying multicore fibers hold the promise to combine the simplicity of fiber lasers with unprecedented performance scaling prospects and the additional benefit of enabling dynamic beam and pulse shaping. In this paper, basic considerations about design parameters of multicore fibers with non-coupling cores are given and the impact of physical effects on the output emission is discussed. State-of-the art results of multicore-fiber-based laser systems are reviewed with these fibers now being able to output kW-level average powers and nanosecond pulses with over 100 mJ pulse energies. Finally, an outlook regarding future performance targets and possible applications is given.

目前，光纤激光器是高平均功率达到多千瓦的相干光源的首选之一。此外，它们还广泛用于产生mj范围内中等能量的超短脉冲。然而，许多物理限制目前阻碍了进一步的性能扩展。克服这些限制的一种方法是并行放大器的相干光束组合。这种方法导致激光系统的操作超出了单个放大器的限制，尽管代价是增加了占地面积和复杂性。放大多芯光纤有望将光纤激光器的简单性与前所未有的性能扩展前景以及实现动态光束和脉冲整形的额外好处结合起来。本文给出了非耦合芯多芯光纤设计参数的基本考虑，并讨论了物理效应对输出发射的影响。回顾了基于多芯光纤的激光系统的最新成果，这些光纤现在能够输出千瓦级的平均功率和纳秒脉冲，脉冲能量超过100兆焦耳。最后对未来的性能目标和可能的应用进行了展望。

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引用次数: 0

Synergistic enhancement of ammonia sensing using U-shaped tapered no-core fiber and functional group-modulated MXene 利用u型锥形无芯光纤和功能基团调制MXene协同增强氨传感

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-17 DOI: 10.1016/j.yofte.2025.104489

Pengyu Liu , Yongchao Zeng , Lihui Feng , Xiangyue Liu

The development of high-sensitivity sensing technologies for ammonia (NH₃), a common and toxic industrial gas, is crucial for public safety and environmental protection. Two-dimensional materials MXene have shown great potential in gas sensing due to their excellent electronic and optical properties, yet their integration with fiber-optic platforms and the underlying sensing mechanisms require further exploration. In this study, we propose and fabricate an NH₃ sensor based on a Ti₃C₂T_x MXene-functionalized U-shaped Tapered No-core fiber (UTNCF). This structure enhances the light-matter interaction with the MXene material through a strong evanescent field effect. Concurrently, we employed density functional theory (DFT) to systematically simulate the interaction between NH₃ molecules and Ti₃C₂T_x with varying ratios of functional groups, calculating the band structure and charge transfer. Furthermore, the BoltzTrap module was utilized to analyze the changes in Ti₃C₂T_x ’s optical refractive index upon NH₃ adsorption, thereby revealing the intrinsic physical mechanism of the sensor. Experimental results demonstrate that the developed sensor exhibits good performance over an NH₃ concentration range of 0–320 ppm. The sensor’s transmission spectrum shows a significant redshift with increasing NH₃ concentration, achieving a high sensitivity of 1.8 pm/ppm with good linearity. Theoretical calculations confirm that the primary sensing mechanism is the charge transfer from NH₃ molecules to the Ti₃C₂T_x surface. This process alters the material’s carrier concentration, leading to a measurable change in its complex refractive index, which is in high agreement with our experimental observations. This work successfully combines theoretical calculations with experimental validation to not only develop a high-sensitivity fiber-optic NH₃ sensor but also to elucidate its sensing mechanism from a first-principle’s perspective. It provides an effective strategy for designing novel, high-performance Ti₃C₂T_x-based optical gas sensors with significant application prospects in industrial safety and environmental monitoring.

氨（NH3）是一种常见的有毒工业气体，其高灵敏度传感技术的发展对公共安全和环境保护至关重要。二维材料MXene由于其优异的电子和光学性能在气体传感方面显示出巨大的潜力，但其与光纤平台的集成以及潜在的传感机制有待进一步探索。在这项研究中，我们提出并制作了一种基于Ti3C2Tx mxene功能化u型锥形无芯光纤（UTNCF）的NH3传感器。这种结构通过强倏逝场效应增强了与MXene材料的光-物质相互作用。同时，我们利用密度泛函理论（DFT）系统地模拟了NH3分子与不同官能团比例的Ti3C2Tx之间的相互作用，计算了能带结构和电荷转移。利用BoltzTrap模块分析了吸附NH3后Ti3C2Tx光学折射率的变化，揭示了该传感器的内在物理机制。实验结果表明，该传感器在NH3浓度0 ~ 320 ppm范围内具有良好的检测性能。随着NH3浓度的增加，传感器的透射光谱呈现出明显的红移，灵敏度达到1.8 pm/ppm，线性良好。理论计算证实了主要的传感机制是NH3分子向Ti3C2Tx表面的电荷转移。这一过程改变了材料的载流子浓度，导致其复折射率的可测量变化，这与我们的实验观察结果高度一致。本工作成功地将理论计算与实验验证相结合，不仅开发了高灵敏度的光纤NH3传感器，而且从第一性原理的角度阐明了其传感机理。为设计新型高性能ti3c2tx光学气体传感器提供了一种有效的策略，在工业安全和环境监测中具有重要的应用前景。

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引用次数: 0

Deployment cost optimization in fiber-wireless network: A study of greedy and dynamic-programming based approaches 光纤无线网络部署成本优化：基于贪婪和动态规划方法的研究

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-12 DOI: 10.1016/j.yofte.2025.104477

Ravi Babu , Govind Sreekar Shenoy

Fiber Wireless (FiWi) access network combines fiber optics and wireless access technology with the objective of providing solutions to the problems of dimensioning, scalability, planning, and quality of service (QoS) offered by the services such as smart grid, smart cities, and the Internet of Things (IoT). The growing bandwidth demands of emerging applications implemented by these services pose significant challenges for the planning and scalability of FiWi network infrastructure. Providing a large-scale FiWi access network to accommodate large user groups requires cost-effective deployment solutions. It is important to recognize that FiWi network deployment strategies must achieve an effective balance between minimizing deployment cost and ensuring scalability. Consequently, planning and scalability considerations in communication infrastructure have emerged as key areas of research interest. Motivated by this requirement, this paper attempts to address two key problems in FiWi network deployment: optimizing FiWi deployment cost and maximizing user inclusion for network services in cost-constrained deployments. To address these problems, we propose greedy, dynamic programming, and genetic algorithm–based approaches. Experimental evaluations across diverse test cases demonstrate that the proposed methods yield optimal cost deployments while ensuring more than 95% user inclusion under cost-constrained scenarios.

FiWi （Fiber Wireless）接入网将光纤与无线接入技术相结合，旨在解决智能电网、智慧城市、物联网等业务的规模、可扩展性、规划和服务质量（QoS）等问题。这些服务实现的新兴应用对带宽的需求不断增长，对FiWi网络基础设施的规划和可扩展性提出了重大挑战。提供大规模的FiWi接入网来容纳大量的用户群，需要具有成本效益的部署方案。必须认识到，FiWi网络部署策略必须在最小化部署成本和确保可扩展性之间取得有效平衡。因此，通信基础设施的规划和可扩展性考虑已成为研究兴趣的关键领域。基于这一需求，本文试图解决FiWi网络部署中的两个关键问题：优化FiWi部署成本和在成本约束部署中最大化用户对网络服务的包容。为了解决这些问题，我们提出了贪心、动态规划和基于遗传算法的方法。跨不同测试用例的实验评估表明，所提出的方法产生了最优的成本部署，同时确保在成本受限的情况下超过95%的用户包含。

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引用次数: 0

Exploring ultrafast photo-thermal and photo-acoustic dynamics of material employing localized surface plasmon-mediated fiber optic sensor 利用局域表面等离子体介导的光纤传感器探索材料的超快光热和光声动力学

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-22 DOI: 10.1016/j.yofte.2025.104492

Rani Dutta, Tapanendu Kundu

This study explores ultrafast photothermal and photoacoustic dynamics of materials using an evanescent wave absorption-based U-bent optical fiber (U-Fb) sensor, functionalized with gold (Au) and silver (Ag) nanoparticles. Leveraging localized surface plasmon resonance (LSPR), the sensor enables rapid detection of refractive index (RI) changes due to non-radiative heat dissipation under optical excitation. The nanoparticle-functionalized probes were first calibrated under controlled temperature and RI conditions. In order to get the insight of the photothermal processes, pump–probe experiments were conducted using a 514 nm chopped continuous-wave (CW) laser and a 532 nm nanosecond pulsed laser as pump sources, while a 405 nm probe beam monitored LSPR responses under both resonant and off-resonant conditions. It was observed that when the excitation beam overlaps with the probe, nonradiative decay of LSPR absorption contributes to the thermal change of the surrounding medium. To further explore heat propagation dynamics, the distance between the fiber probe and the photothermal source was varied. This allowed for temporal analysis of RI changes and differentiation between thermal contributions from the immobilized nanoparticles and the absorbing material. The results revealed that, under chopped CW excitation, AgNP-functionalized probes exhibited higher sensing sensitivity than AuNP-functionalized probes, despite having approximately similar thermal response times. Since the AgNp LSPR is off resonant with pulse excitation and resonant with the probe beam, this configuration provides better sensitivity and the clarity in monitoring the time profile of the material thermal response than AuNp- functionalized probe. Notably, AgNP- functionalized probes also detect shock waves and acoustic signatures generating from the absorbing material under nanosecond pulse excitation, underscoring their potential in measuring the fast pressure dynamics. Overall, the U-Fb probe sensor offers a compact, tunable platform for real-time monitoring of ultrafast thermal and mechanical events, with applications in photothermal spectroscopy, thermal wave sensing, and advanced material diagnostics.

本研究利用金（Au）和银（Ag）纳米粒子功能化的基于倏逝波吸收的u型弯曲光纤（U-Fb）传感器，探索了材料的超快光热和光声动力学。利用局域表面等离子体共振（LSPR），该传感器能够快速检测由于光激发下非辐射散热引起的折射率（RI）变化。首先在受控温度和RI条件下对纳米颗粒功能化探针进行校准。为了深入了解光热过程，采用514 nm的斩切连续波（CW）激光器和532 nm纳秒脉冲激光器作为泵浦源进行了泵浦-探针实验，同时采用405 nm的探针束监测了谐振和非谐振条件下LSPR的响应。当激发束与探针重叠时，LSPR吸收的非辐射衰减导致了周围介质的热变化。为了进一步研究热传播动力学，改变光纤探针与光热源之间的距离。这允许对RI变化进行时间分析，并区分固定纳米颗粒和吸收材料的热贡献。结果表明，在短切连续波激发下，agnp功能化探针比aunp功能化探针表现出更高的传感灵敏度，尽管它们的热响应时间大致相似。由于AgNp LSPR与脉冲激励和探针光束共振，这种配置在监测材料热响应的时间分布方面提供了比AuNp功能化探针更好的灵敏度和清晰度。值得注意的是，AgNP功能化探针还可以检测吸收材料在纳秒脉冲激励下产生的冲击波和声学特征，强调了它们在测量快速压力动力学方面的潜力。总体而言，U-Fb探头传感器提供了一个紧凑、可调的平台，用于实时监测超快热和机械事件，应用于光热光谱、热波传感和先进材料诊断。

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引用次数: 0

Linewidth reduction of a thulium-holmium co-doped fiber laser to sub-kHz using self-injection locking with an external sub-ring 利用带外子环的自注入锁紧将铥-钬共掺光纤激光器的线宽减小到亚khz

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-08 DOI: 10.1016/j.yofte.2025.104448

Dandan Yang , Fengping Yan , Qi Qin , Ting Li , Chenhao Yu , Xiangdong Wang , Hao Guo , Yuezhi Cai , Wenjie Ji , Youchao Jiang , Qiuyu Huang , Siyu Peng , Ting Feng

In this paper, a self-injection locking technique combining a delay fiber and sub-ring is proposed for the linewidth compression of a single-longitudinal-mode (SLM) laser in the 1.94 µm band. The laser output with an optical signal-to-noise ratio of 74.1 dB and linewidth less than 1 kHz is obtained. Furthermore, to the best of our knowledge, the feedback cavity, which exhibits excellent linewidth compression, was formed by the combination of a sub-ring and delay fiber and has been experimentally demonstrated for the first time. This narrow linewidth SLM fiber laser is highly competitive in advanced coherent light detection fields including coherent Doppler wind lidar, high-speed coherent optical communication, and precise absolute distance coherent measurement.

本文提出了一种结合延迟光纤和子环的自注入锁定技术，用于1.94 µm波段单纵模（SLM）激光器的线宽压缩。得到了光信噪比为74.1 dB、线宽小于1 kHz的激光输出。此外，据我们所知，通过子环和延迟光纤的组合形成了具有良好线宽压缩性能的反馈腔，并首次在实验中得到了证明。这种窄线宽SLM光纤激光器在相干多普勒风激光雷达、高速相干光通信、精确绝对距离相干测量等先进相干光探测领域具有很强的竞争力。

引用次数: 0

Invited Paper: High-power monolithic narrow-linewidth 1.6 mJ/8 ns fiber laser system based on all-glass spun tapered double-clad fiber amplifier 邀请论文：基于全玻璃纺丝锥形双包层光纤放大器的大功率单片窄线宽1.6 mJ/ 8ns光纤激光器系统

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2026-01-01 Epub Date: 2025-11-18 DOI: 10.1016/j.yofte.2025.104465

Hossein Fathi , Uttam Kumar Samanta , Evgenii Motorin , Ebrahim Aghayari , Andrey Grishchenko , Matias Koivurova , Regina Gumenyuk , Valery Filippov

High-energy, narrow-linewidth nanosecond pulses are highly demanding for many applications that require high temporal and spatial coherence. However, the amplification of narrow-linewidth pulses is primarily limited by stimulated Brillouin scattering, which causes pulse instabilities, back-reflected pulses, and catastrophic damage effects on optical components. In this work, we present a 1.6 mJ narrow-linewidth nanosecond pulsed fiber laser system based on all-glass spun tapered double-clad fibers without employing any mitigating technique for the stimulated Brillouin scattering effect. The system delivers pulses with an 8 ns duration at a 100 kHz repetition rate, over 97.5% degree of polarization, a beam quality factor of

M^{2} \sim 1.3

, a spectral linewidth of 53.8 MHz, a 160 W average power, and 188 kW peak power with a slope efficiency of 97.6%. The degree of spatial coherence of the amplified signal was measured to be 0.94. Our results are highly valued in applications requiring high-energy, high-coherence pulses with spectral, spatial, and polarization characteristics in a compact system.

高能、窄线宽纳秒脉冲对许多需要高时空相干性的应用要求很高。然而，窄线宽脉冲的放大主要受到受激布里渊散射的限制，布里渊散射会导致脉冲不稳定、反向反射脉冲和对光学元件的灾难性损伤效应。在这项工作中，我们提出了一种基于全玻璃纺锥形双包层光纤的1.6 mJ窄线宽纳秒脉冲光纤激光器系统，而不采用任何减轻受激布里频散射效应的技术。该系统脉冲持续时间为8 ns，重复频率为100 kHz，极化度超过97.5%，光束质量因子M2 ~ 1.3，谱线宽度为53.8 MHz，平均功率为160 W，峰值功率为188 kW，斜率效率为97.6%。经测量，放大信号的空间相干度为0.94。我们的结果在需要高能、高相干脉冲的应用中具有很高的价值，这些脉冲具有光谱、空间和紧凑系统的偏振特性。

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引用次数: 0

Reinforcement learning-based wavelength-dependent power control for WDM systems 基于强化学习的波分复用系统波长相关功率控制

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2025-12-01 Epub Date: 2025-10-31 DOI: 10.1016/j.yofte.2025.104470

Gustavo Sousa Pavani , Dipankar Sengupta , Maria Freire-Hermelo , Antoine Lavignotte , Christine Tremblay , Catherine Lepers

In dynamic optical networks, wavelength-dependent power control is a challenging issue because it can dramatically affect lightpath quality of transmission. To address this issue, the authors proposed a reinforcement learning (RL) channel power equalization method to compensate EDFA wavelength-dependent gain in a single step. The optical power of the active WDM channels is monitored at the endpoints of the optical multiplex section (OMS) to learn the best policy for optimizing the variable attenuation elements of the reconfigurable optical add-drop multiplexer (ROADM). The proposed approach is validated experimentally on a three-span WDM experimental testbed, where a surrogate model of the RL environment significantly reduces the management effort required to collect samples. The applicability of the RL method to our experimental system demonstrates an average power difference reduction up to 87%, which was obtained for the 24-channel random allocation use case.

在动态光网络中，波长相关的功率控制是一个具有挑战性的问题，因为它会极大地影响传输的光路质量。为了解决这一问题，作者提出了一种强化学习（RL）通道功率均衡方法，以单步补偿EDFA波长相关增益。在光复用段（OMS）的端点处监测有源WDM信道的光功率，以学习优化可重构光加丢复用器（ROADM）的可变衰减元素的最佳策略。所提出的方法在三跨WDM实验测试平台上进行了实验验证，其中RL环境的代理模型显着减少了收集样本所需的管理工作量。RL方法对我们的实验系统的适用性表明，在24通道随机分配用例中，平均功率差降低了87%。

引用次数: 0

Highly Yb-doped silica-based fibers for ultra-short lasers and amplifiers 用于超短激光器和放大器的高掺镱硅基光纤

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology

Pub Date : 2025-12-01 Epub Date: 2025-10-10 DOI: 10.1016/j.yofte.2025.104427

Mikhail E. Likhachev , Egor K. Mikhailov , Tatiana S. Zaushitsyna , Vitaliya A. Agakhanova , Lyudmila D. Iskhakova , Mikhail M. Bubnov , Alexey S. Lobanov , Andrey A. Umnikov , Denis S. Lipatov

Recent state-of-the-art for ultra-highly Yb-doped silica-based fibers have been presented. Detailed properties of the developed fibers, i.e. refractivity of different co-dopants, background loss behavior due to Yb-doping, photodarkening effects and lasing efficiency degradation at high Yb concentrations have been studied. Application of highly Yb-doped fibers for obtaining of lasers and amplifiers of an extremely shot lengths have been discussed. Novel results regarding development of ultra-highly Yb-doped large-mode-area (LMA) fiber amplifier have been presented.

超高掺镱硅基纤维的最新进展。研究了所制备的光纤的详细性能，如不同共掺杂剂的折射率、掺杂Yb引起的背景损耗行为、光变暗效应和高浓度Yb下的激光效率退化。讨论了高掺镱光纤在获得极长光阑激光器和放大器中的应用。介绍了超高掺镱大模面积光纤放大器的研究进展。

引用次数: 0