Journal of Lightwave Technology最新文献_第2页

Hybrid Silicon-Interposer Platform With Integrated Suspended Antenna for Compact Photonic Terahertz Communications 小型光子太赫兹通信中集成悬浮天线的混合硅中间层平台

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-20 DOI: 10.1109/JLT.2025.3600999

Chenhao Lu;Zhe Ding;Linze Li;Liga Bai;Tianyu Long;Yuchen Song;Chaoyuan Jin;Baile Chen;Lu Zhang;Chenhui Li

{"title":"Hybrid Silicon-Interposer Platform With Integrated Suspended Antenna for Compact Photonic Terahertz Communications","authors":"Chenhao Lu;Zhe Ding;Linze Li;Liga Bai;Tianyu Long;Yuchen Song;Chaoyuan Jin;Baile Chen;Lu Zhang;Chenhui Li","doi":"10.1109/JLT.2025.3600999","DOIUrl":"https://doi.org/10.1109/JLT.2025.3600999","url":null,"abstract":"This paper presents a fully integrated photonic terahertz communications system based on a micromachined silicon interposer platform, addressing critical challenges in THz system miniaturization. We demonstrate the hybrid integration of a modified-UTC-PD, low-loss passive circuits, and a novel suspended membrane antenna with micromachined reflector cavity, achieving high compactness while maintaining high transmission performance. The stress in the membrane has been controlled and measured. The antenna design overcomes traditional substrate loss limitations through its suspended structure and integrated reflector, while the silicon-micromachined package enables wafer-level integration with exceptional signal integrity. System characterization reveals wireless data transmission at 170 GHz carrier frequency with 12 Gb/s using OOK modulation. Constant Modulus Algorithm (CMA) is applied for channel equalization. The results highlight the potential of silicon interposer technology for future compact, high-performance THz systems.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9368-9374"},"PeriodicalIF":4.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

256 GBaud RRM-Based OOK Link in C-Band Enabled by Neural Network Equalization 神经网络均衡使能c波段256 GBaud rrm的OOK链路

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-19 DOI: 10.1109/JLT.2025.3599665

Dan Li;Yevhenii Osadchuk;Armands Ostrovskis;Toms Salgals;Francesco Da Ros;Carlos Natalino;Darko Zibar;Lu Zhang;Xianbin Yu;Vjaceslavs Bobrovs;Xiaodan Pang;Oskars Ozolins

{"title":"256 GBaud RRM-Based OOK Link in C-Band Enabled by Neural Network Equalization","authors":"Dan Li;Yevhenii Osadchuk;Armands Ostrovskis;Toms Salgals;Francesco Da Ros;Carlos Natalino;Darko Zibar;Lu Zhang;Xianbin Yu;Vjaceslavs Bobrovs;Xiaodan Pang;Oskars Ozolins","doi":"10.1109/JLT.2025.3599665","DOIUrl":"https://doi.org/10.1109/JLT.2025.3599665","url":null,"abstract":"With the AI boom, data center interconnects require higher symbol rates and throughput. Intensity modulation and direct detection (IM/DD) is a cost-effective candidate for short-reach optical links. Ring resonator-based modulators (RRMs) with broad bandwidth have emerged as a promising solution for high-speed IM/DD links. However, RRMs introduce nonlinear impairments, which can cause rate bottlenecks in IM/DD. In this work, we demonstrate up to 256 GBaud RRM-based optical amplification-free on-off keying links enabled by two NN-based equalizers. To the best of our knowledge, this work achieves the highest reported symbol rate for an RRM-based IM/DD link. We achieve bit-error-ratio below the 7% overhead hard-decision forward error correction threshold after transmission over 100 m single-mode fiber (SMF) for all considered symbol rates. Our work outperforms recent state-of-the-art RRM-based IM/DD studies by applying NN equalization using a 42-GHz bandwidth RRM with a driving voltage of 2.7 <inline-formula><tex-math>${{mathrm{V}}_{text{pp}}}$</tex-math></inline-formula>. The achieved performance and complexity analysis reported in this work are a key step towards future implementations of NN-based equalizers in hardware to enable high-symbol-rate IM/DD systems.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9148-9156"},"PeriodicalIF":4.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FPGA-Driven Soliton Locking for Reduced Manual Intervention in Microcombs 减少微梳人工干预的fpga驱动孤子锁定

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-19 DOI: 10.1109/JLT.2025.3600657

Ziye Wang;Jihoon Baek;Changmin Ahn;Daewon Suk;Hansuek Lee;Jungwon Kim

{"title":"FPGA-Driven Soliton Locking for Reduced Manual Intervention in Microcombs","authors":"Ziye Wang;Jihoon Baek;Changmin Ahn;Daewon Suk;Hansuek Lee;Jungwon Kim","doi":"10.1109/JLT.2025.3600657","DOIUrl":"https://doi.org/10.1109/JLT.2025.3600657","url":null,"abstract":"In this article, we propose and demonstrate a soliton locking structure based on FPGA control. The FPGA integrates all necessary control modules for power-kicking control and incorporates additional techniques to simplify the locking process and reduce the need for manual intervention. These techniques include decoupling the PZT driving voltage from the laser frequency through pre-distortion, using reinforcement learning to elongate the soliton, and implementing automatic soliton tracking to cancel the relative frequency drift between the pump laser and the microresonator. In our experiment, each locking attempt requires only 8.24 ms. On average, approximately 10 attempts are sufficient to re-lock single soliton after an abrupt vibration induced by beating the optical table, resulting in an average locking time of 82 ms. The FPGA-based system automatically detects and re-locks without manual intervention, ensuring reliable soliton locking. The results show that this structure effectively locks single solitons in silica microcombs for both 17 GHz and 22 GHz microresonators with a Q factor above 10<sup>8</sup>, showing a state-of-the-art stability and robustness.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9270-9275"},"PeriodicalIF":4.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser FM Noise Compensation in Fiber-THz Convergence Systems Employing Robust Variational Bayesian Unscented Kalman Filter 基于鲁棒变分贝叶斯无嗅卡尔曼滤波的光纤-太赫兹收敛系统激光调频噪声补偿

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-19 DOI: 10.1109/JLT.2025.3600402

Zhigang Xin;Jiao Zhang;Min Zhu;Qing Zhong;Bingchang Hua;Yuancheng Cai;Junjie Ding;Mingzheng Lei;Xingyu Chen;Yucong Zou;Jinbiao Xiao;Bo Liu;Yongming Huang;Jianjun Yu

{"title":"Laser FM Noise Compensation in Fiber-THz Convergence Systems Employing Robust Variational Bayesian Unscented Kalman Filter","authors":"Zhigang Xin;Jiao Zhang;Min Zhu;Qing Zhong;Bingchang Hua;Yuancheng Cai;Junjie Ding;Mingzheng Lei;Xingyu Chen;Yucong Zou;Jinbiao Xiao;Bo Liu;Yongming Huang;Jianjun Yu","doi":"10.1109/JLT.2025.3600402","DOIUrl":"https://doi.org/10.1109/JLT.2025.3600402","url":null,"abstract":"The convergence of fiber and terahertz (THz) wireless communication has emerged as a promising solution for ultra-high-speed data transmission in future 6G networks. However, phase noise (PN) arising from the intrinsic linewidth and phase fluctuations of semiconductor lasers significantly degrades the transmission reliability of photonics-enabled THz systems. In this paper, we first describe the system model, including the derivation of the signal model, the characterization of laser frequency modulation (FM) noise, and the generation of time-domain PN. To address phase distortions induced by laser FM noise, we propose a carrier phase recovery (CPR) algorithm based on a modified unscented Kalman filter (UKF) with adaptivity and robustness. The proposed method incorporates a covariance adaptation strategy using variational Bayesian inference to dynamically track time-varying noise statistics, along with a Huber M-estimator-based robust update mechanism to mitigate the effects of outliers and non-Gaussian disturbances. The proposed algorithm is experimentally validated in a 320 GHz dual-polarization fiber–THz converged transmission system. By configuring lasers with controllable FM noise, a range of representative PN conditions are emulated, including intrinsic linewidth, flicker (<inline-formula><tex-math>$1/f$</tex-math></inline-formula>) noise, and relaxation oscillation frequency. The results show that the proposed algorithm achieves up to 0.66dB OSNR gain compared to the BPS method under various FM noise conditions. It also demonstrates superior phase tracking capability and bit error performance for both 32 GBaud PDM-16QAM and 23 GBaud PDM-32QAM signals, validating the robustness and adaptability of the algorithm.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9246-9257"},"PeriodicalIF":4.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Performance Enhanced 1-Bit Bandpass Sturdy-Multi-Stage Noise Shaping Delta-Sigma Modulator for Radio-Over-Fiber Transmission Systems 一种用于光纤传输系统的性能增强的1位带通多级噪声整形Delta-Sigma调制器

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-19 DOI: 10.1109/JLT.2025.3600534

Jianzhao Gou;Xiupu Zhang

引用次数: 0

Fractional-Order Digital-Analog Radio-Over-Fiber System for Continuous Scaling Between SNR and Spectral Efficiency 在信噪比和频谱效率之间进行连续缩放的分数阶数模光纤无线电系统

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-19 DOI: 10.1109/JLT.2025.3599687

Yicheng Xu;Yixiao Zhu;Mengfan Fu;Xi Chen;Yongxin Sun;Weisheng Hu;Qunbi Zhuge

{"title":"Fractional-Order Digital-Analog Radio-Over-Fiber System for Continuous Scaling Between SNR and Spectral Efficiency","authors":"Yicheng Xu;Yixiao Zhu;Mengfan Fu;Xi Chen;Yongxin Sun;Weisheng Hu;Qunbi Zhuge","doi":"10.1109/JLT.2025.3599687","DOIUrl":"https://doi.org/10.1109/JLT.2025.3599687","url":null,"abstract":"Digital-analog radio-over-fiber (DA-RoF) is regarded as a promising solution for fronthaul due to its efficient scaling between the recovered signal-to-noise ratio (SNR) and spectral efficiency (SE). However, its drawback lies in discrete bandwidth expansion only at an integer multiple, which lacks flexibility for various channel conditions. In this paper, we propose and experimentally demonstrate a fractional-order DA-RoF (FDA-RoF) scheme, which enables the continuous adjustment of bandwidth ratios while maintaining the efficient scaling law of approximately 10 dB SNR gain per additional bandwidth. A theoretical analysis of FDA-RoF is derived, which establishes the mathematical relationship between the recovered SNR and fractional bandwidth ratio. The numerical results with different incremental steps of the bandwidth ratio validate that FDA-RoF can realize continuous bandwidth expansion and retain efficient SNR scaling across various channel SNRs. In the experiment, an SNR gain of ∼2.5 dB can be achieved as the bandwidth ratio increases linearly with a step of 0.25, consistent with the scaling law observed in the integer-order DA-RoF (IDA-RoF). FDA-RoF can bridge the gap in discrete bandwidth expansion of IDA-RoF through finer-grained adjustment, offering a viable pathway for future flexible and spectrally-efficient fronthaul networks.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9222-9232"},"PeriodicalIF":4.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Chromatic Dispersion on Oversampled Digital Clock Recovery in Direct-Detection Systems: Analysis and Solutions 色散对直接检测系统中过采样数字时钟恢复的影响：分析与解决方案

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-19 DOI: 10.1109/JLT.2025.3600353

Patrick Matalla;Christian Koos;Sebastian Randel

{"title":"Impact of Chromatic Dispersion on Oversampled Digital Clock Recovery in Direct-Detection Systems: Analysis and Solutions","authors":"Patrick Matalla;Christian Koos;Sebastian Randel","doi":"10.1109/JLT.2025.3600353","DOIUrl":"https://doi.org/10.1109/JLT.2025.3600353","url":null,"abstract":"Cloud-based services such as the training of artificial intelligence (AI)/machine learning (ML) models in large-scale data centers as well as smart city applications, such as the Internet of things (IoT), connected driverless vehicles, etc., are key drivers for ever higher data rates, especially in short-range fiber-optic links. Such optical transceivers employ intensity-modulation and direct-detection (IM/DD) to reduce the costs and power consumption and, therefore, chromatic dispersion (CD) is a nonlinear channel effect with respect to the received signal. With net data rates currently going up to 100 Gbit/s for passive optical networks (PONs) and 400 Gbit/s for Ethernet connections, CD is a main limitation in transmission performance at such high data rates. To reconstruct the signal impaired by CD, research has mainly discussed nonlinear equalizers and ML models, while, to the best of the authors knowledge, no research has been conducted on the influence of CD on non-data-aided, digital clock recovery in direct-detection systems. In this work, we investigate analytically and in simulation the effect of CD on oversampled digital clock recovery and find that for some dispersion values, clock recovery fails entirely. Based on our findings, we present two dispersion-tolerant clock recovery algorithms that work for non-return-to-zero (NRZ) and digital pulse-shaped signals as well as faster-than-Nyquist (FTN) signals. Finally, we validate our findings and algorithms in a 34-GBd four-level pulse amplitude modulation (PAM4) transmission experiment for NRZ and root-raised cosine (RRC) pulse-shaped signals and different accumulated dispersion values.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9195-9204"},"PeriodicalIF":4.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11129685","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photonic Compressive Sensing System Based on 1-Bit Quantization for Broadband Signal Sampling 基于1位量化的宽带信号采样光子压缩传感系统

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-18 DOI: 10.1109/JLT.2025.3599903

Yuxiang Cai;Xiaohu Tang;Yamei Zhang;Han Gao;Xiuyuan Sun;Shilong Pan

{"title":"Photonic Compressive Sensing System Based on 1-Bit Quantization for Broadband Signal Sampling","authors":"Yuxiang Cai;Xiaohu Tang;Yamei Zhang;Han Gao;Xiuyuan Sun;Shilong Pan","doi":"10.1109/JLT.2025.3599903","DOIUrl":"https://doi.org/10.1109/JLT.2025.3599903","url":null,"abstract":"Photonic compressive sensing (PCS), a paradigm for broadband sparse radio frequency (RF) signal acquisition, is recognized for its ability to significantly reduce sampling rate. However, conventional PCS systems face several challenges, including high storage requirements, limited noise resistance, and increased energy consumption during sampling. Additionally, they often struggle to accurately reconstruct frequency non-sparse signals and typically fail to resolve the time-frequency characteristics of signals with long temporal durations. In this study, we propose and experimentally validate a novel 1-bit quantization PCS (1-bit PCS) framework. Our system employs dictionary learning and local compressive sensing algorithm, enabling the effective recovery of various signal types, such as multi-tone, step-frequency, and linear frequency modulation (LFM) signals across a wide frequency range of 0 to 5 GHz. The sampling rate achieved is 1 GSa/s, corresponding to a compression ratio of 10. With this system, not only can the time-domain waveforms and spectrum of signals be accurately recovered, but the time-frequency characteristics are also captured with precision. This makes the system highly promising for applications in resource-limited scenarios.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9442-9449"},"PeriodicalIF":4.8,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Performance Fiber Optical Pressure Sensor Based on Microsphere Air Bubble Cavity for Depth Measurement in Deep Ocean 基于微球气泡腔的深海测深高性能光纤压力传感器

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-18 DOI: 10.1109/JLT.2025.3599639

Ri-Qing Lv;Wei Deng;Chen-Chen Du;Hao Gong;Xiong-Hao Su;Yu-Cheng Deng;Hong-Kun Zheng;Ya-Nan Zhang;Yong Zhao

{"title":"High-Performance Fiber Optical Pressure Sensor Based on Microsphere Air Bubble Cavity for Depth Measurement in Deep Ocean","authors":"Ri-Qing Lv;Wei Deng;Chen-Chen Du;Hao Gong;Xiong-Hao Su;Yu-Cheng Deng;Hong-Kun Zheng;Ya-Nan Zhang;Yong Zhao","doi":"10.1109/JLT.2025.3599639","DOIUrl":"https://doi.org/10.1109/JLT.2025.3599639","url":null,"abstract":"A compact high-performance fiber optical pressure sensor with large measuring range, high precision and high stability has been proposed, which is suitable for high-pressure measurement in deep marine environments. It mainly consists of a microsphere air bubble cavity, which is easily fabricated and only formed by splicing a section of hollow core fiber with a single mode fiber and discharging to form the cavity. It has owned a remarkable property to be stable in deep ocean with the pressure up to dozens or hundreds of megapascal. Gold layer is adopted to coat the cavity external surface to increase the reflection to get the sensing spectrum with a high signal to noise. The proposed sensing structure has been studied through theoretically analysis, numerical simulation and experimental research. According to the experimental results, the proposed sensor with cavity length of 300 μm and top thickness of about 7.78 μm, could achieve a high sensitivity of -116.75 pm/MPa in wavelength domain with a linearity of 0.99997 up to 60 MPa, and -23.33 nm/MPa in cavity length domain by demodulation algorithm with a linearity of 1 and accuracy of 0.089%FS, with the limitation of our pressure experimental setup. Moreover, the sensor exhibits an extremely low temperature sensitivity of 0.2511 nm/°C in cavity length domain and it means the cross-sensitivity between pressure and temperature is -0.01076 MPa/°C. The upper pressure limit of the proposed sensor is not achieved, so it would be a more well performance after obtaining its limitation. It holds a great potential for application in marine depth measurements.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9505-9512"},"PeriodicalIF":4.8,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Optimization Strategy for High-Energy, Few-Cycle Pulse Generation Directly From Er-Doped Mamyshev Oscillators 直接由掺铒马米舍夫振荡器产生高能、少周期脉冲的优化策略

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-08-14 DOI: 10.1109/JLT.2025.3599174

Fan Zou;Zechuan Liu;Yao Yao;Kuo Liu;Haiyu Zhi;Jie Zhang;Zehuang Lu;Haoyu Wu

{"title":"An Optimization Strategy for High-Energy, Few-Cycle Pulse Generation Directly From Er-Doped Mamyshev Oscillators","authors":"Fan Zou;Zechuan Liu;Yao Yao;Kuo Liu;Haiyu Zhi;Jie Zhang;Zehuang Lu;Haoyu Wu","doi":"10.1109/JLT.2025.3599174","DOIUrl":"https://doi.org/10.1109/JLT.2025.3599174","url":null,"abstract":"This paper examines the dispersion and nonlinearity limitations of 1.5-μm fiber lasers and numerically proposes an optimization strategy for a Mamyshev oscillator (MO) utilizing conventional Er-doped fibers to generate high-energy, few-cycle pulses. The approach focuses on reducing the nonlinear chirp while enhancing linear chirp characteristics in high-energy degraded-parabolic solitons through two key steps: configuring an initial MO for stable self-similar soliton evolution near the 40 nm gain bandwidth, and employing dispersion delay lines (DDLs) and highly nonlinear fibers (HNLFs) for chirp-managed spectral expansion towards few-cycle generation. Spectrogram analysis reveals that precise passive fiber layout reduces optical wave breaking and stimulated Raman scattering, critical for parabolic pulse formation. For spectral broadening, a large negative dispersion DDL suppresses Raman effects while a moderate longer HNLF compensates for nonlinear chirp through positive dispersion. The optimized MO produces 12 fs (2.4 cycles) pulses with 21 nJ energy and >1.2 MW peak power. Importantly, the DDL-HNLF incorporation enables spectral broadening without destabilizing the core self-similar attractor, evidenced by strong correlations (Pearson r >0.95, p <0.01) between two-stage configurations. This avoids the need for comprehensive cavity redesign, thereby reducing complexity compared to monolithic-design broadband pulsed fiber oscillators.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9432-9441"},"PeriodicalIF":4.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0