Journal of Lightwave Technology最新文献_第10页

Highly Sensitive Optical Fiber Fabry–Perot Gas Pressure Sensor Based on Microwave Photonics With Phase Demodulation 基于相位解调微波光子学的高灵敏度光纤法布里-珀罗气体压力传感器

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-22 DOI: 10.1109/JLT.2025.3591532

Weihao Yuan;Tao Liu;Zhongyang Xu;Min Xue;Shilong Pan

引用次数: 0

Entropy-Loading Enhanced 300 GHz DP-IM/DD Photonic-Assisted THz Wireless Interconnect 熵负载增强的300ghz DP-IM/DD光子辅助太赫兹无线互连

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-22 DOI: 10.1109/JLT.2025.3591788

Dayu Shi;Weiqi Lu;Yuhao Fang;Puzhen Yuan;Haojie Zhu;Yang Zou;Qi Yang;William Shieh

{"title":"Entropy-Loading Enhanced 300 GHz DP-IM/DD Photonic-Assisted THz Wireless Interconnect","authors":"Dayu Shi;Weiqi Lu;Yuhao Fang;Puzhen Yuan;Haojie Zhu;Yang Zou;Qi Yang;William Shieh","doi":"10.1109/JLT.2025.3591788","DOIUrl":"https://doi.org/10.1109/JLT.2025.3591788","url":null,"abstract":"We propose and experimentally demonstrate an entropy-loading enhanced 300 GHz dual-polarization intensity-modulation/direct-detection (DP-IM/DD) photonic-assisted terahertz (THz) wireless interconnect architecture. Motivated by severe frequency selectivity and deep spectral notches arising from the cumulative imperfections of broadband modulators, uni-traveling-carrier photodiodes (UTC-PDs), antennas, and TIAs, we adopt an entropy-loading based probabilistically shaped discrete multi-tone (PCS-DMT) modulation to match sub-carrier symbol probabilities to their instantaneous signal-to-noise ratios (SNR). Unlike conventional uniform modulation, the entropy-loaded scheme precisely adapts to frequency-selective channel impairments, significantly enhancing performance and robustness. Experimental results indicate that the proposed approach achieves normalized generalized mutual information (NGMI) gains of up to 0.20 compared with the uniform constellation approach at identical transmit powers. The demonstration reaches a record spectral efficiency of 7.0 bit/s/Hz, delivering a gross data rate of 271.8 Gbps (net 230.9 Gbps) over 33 GHz bandwidth at 0.1 m, surpassing existing direct-detection THz links and approaching coherent system performance with substantially reduced complexity.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8729-8736"},"PeriodicalIF":4.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920574","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

Intelligent Flow Pattern Recognition of Horizontal Gas-Liquid Two-Phase Flow Utilizing Distributed Optical Carrier-Based Microwave Interferometry 基于分布式光载波微波干涉技术的水平气液两相流智能流型识别

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-22 DOI: 10.1109/JLT.2025.3591885

Zhuping Li;Ting Xue;Songlin Li;Yan Wu;Bin Wu

{"title":"Intelligent Flow Pattern Recognition of Horizontal Gas-Liquid Two-Phase Flow Utilizing Distributed Optical Carrier-Based Microwave Interferometry","authors":"Zhuping Li;Ting Xue;Songlin Li;Yan Wu;Bin Wu","doi":"10.1109/JLT.2025.3591885","DOIUrl":"https://doi.org/10.1109/JLT.2025.3591885","url":null,"abstract":"Accurate identification of gas-liquid two-phase flow patterns is crucial for the safety and efficiency of industrial production and energy transportation. This paper proposes a novel method for horizontal gas-liquid two-phase flow pattern recognition based on distributed optical carrier-based microwave interferometry (OCMI) technology and convolutional neural network (CNN) architecture. A theoretical model is established to characterize the force acting on distributed sensing fiber in gas-liquid two-phase flow for the first time. Subsequently, the strain and effective refractive index change in dual-coated sensing fiber under fluid-induced force are modeled. Furthermore, a response model is proposed for OCMI signal under gas-liquid two-phase flow, and related numerical simulation studies are conducted. Based on a specially designed deployment scheme of distributed sensing fiber in the pipeline, the OCMI signals at various sampling points under different flow patterns are experimentally acquired. A one-dimensional CNN (1D-CNN) is constructed to perform convolution along the scanning frequency dimension, and a frequency-spatial CNN (FSCNN) is developed to perform convolution separately along the frequency dimension and spatial dimension. The results demonstrate that the FSCNN enables more effective identification of gas-liquid two-phase flow patterns, achieving an accuracy higher than 91%. The proposed models and schemes provide valuable theoretical and practical references for the research and application of distributed fiber sensing technologies in multiphase complex flow systems.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8974-8980"},"PeriodicalIF":4.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909367","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

Polar Auto-Decoder With Parameterized Optimization Based on Structured End-to-End Bayesian Neural Network in IM/DD Optical Interconnection IM/DD光互连中基于结构化端到端贝叶斯神经网络参数化优化的极性自解码器

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-22 DOI: 10.1109/JLT.2025.3591140

Yujia Mu;Ze Dong;Hailian He;Yuyao Wen;Shaonan Liu;Junyuan Song;Rui Wang;Zhipei Li;Ran Gao;Xiangjun Xin

{"title":"Polar Auto-Decoder With Parameterized Optimization Based on Structured End-to-End Bayesian Neural Network in IM/DD Optical Interconnection","authors":"Yujia Mu;Ze Dong;Hailian He;Yuyao Wen;Shaonan Liu;Junyuan Song;Rui Wang;Zhipei Li;Ran Gao;Xiangjun Xin","doi":"10.1109/JLT.2025.3591140","DOIUrl":"https://doi.org/10.1109/JLT.2025.3591140","url":null,"abstract":"This paper proposes an auto-decoder application employing end-to-end (E2E) learning in intensity-modulation direct-detection (IM/DD) optical interconnection system. Aiming to enhance the feedforward error correction (FEC) reliability with optimized decoding complexity, the polar auto-decoder is explored based on structured E2E Bayesian neural network (BNN) with hybrid model- and data-driven architecture, instead of only optimizing specific components of the communication system. Firstly, the scaling parameters of the model-driven BNN are incorporated into the belief propagation (BP) polar decoder by assigning weights to the layers of the factor graph. Secondly, through the E2E training considering the global impairments in fiber channel, including attenuation, dispersion, and nonlinear distortions, the data-driven components in the polar decoder are shared across different iterations, thus achieving reduced complexity due to the significantly optimized decoding efficiency and error correction performance. Experimental results within 80 GBaud PAM4 signal transmission over single-mode fiber reveal that the proposed auto-decoder employing structured E2E learning strategy obtains 0.7-dB improvement in received power sensitivity, while reducing memory overhead by 80% relative to the MS-DNN decoder and maintaining decoding performance.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8622-8629"},"PeriodicalIF":4.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920581","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 Inter-Core Doping Concentration Discrepancy on Mode-Dependent Gain in Coupled Multi-Core EDFA 耦合多核EDFA中芯间掺杂浓度差异对模式依赖增益的影响

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-22 DOI: 10.1109/JLT.2025.3590755

Tianqi Cheng;Lin Ma;Mingjing Xu;Zuyuan He

{"title":"Impact of Inter-Core Doping Concentration Discrepancy on Mode-Dependent Gain in Coupled Multi-Core EDFA","authors":"Tianqi Cheng;Lin Ma;Mingjing Xu;Zuyuan He","doi":"10.1109/JLT.2025.3590755","DOIUrl":"https://doi.org/10.1109/JLT.2025.3590755","url":null,"abstract":"We theoretically investigate the mode-dependent gain (MDG) in coupled multi-core erbium-doped fiber amplifiers (MC-EDFAs) with inter-core doping concentration discrepancy (ICDCD). The MDGs for both 2-core and 4-core EDFAs with ICDCD under varying bending and twisting conditions are calculated. Simulation results indicate that the ICDCD in a non-twisted, bent coupled MC-EDFA results in a specific bending orientation that reduces the MDG to a value lower than it would be in the absence of ICDCD. We also explore the cumulative effect of bending and twisting on the MDG of coupled MC-EDFAs with ICDCD along the propagation distance under small-signal gain conditions. Random twisting perturbations make the root-mean-square (RMS) of MDG proportional to the square root of fiber length due to random mode coupling, differing from the case without them, where the MDG approximately grows linearly with fluctuations as the fiber length increases. Due to the presence of twisting, ICDCD generally exhibits a deteriorating effect on MDG. However, simulation results demonstrate that for coupled MC-EDFA with ICDCD under various coupling coefficient conditions, an optimal bending radius can be determined to minimize the RMS of MDG. The findings presented in this work will contribute to the understanding of the gain characteristics in coupled MC-EDFA.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8857-8863"},"PeriodicalIF":4.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909037","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

Concave-Tip Optical Fiber Apta-Biosensor Based on Localized Surface Plasmon Resonance for the Detection of Dopamine 基于局部表面等离子体共振的凹尖端光纤apta生物传感器检测多巴胺

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-18 DOI: 10.1109/JLT.2025.3590515

Soroush Rostami;Mohammad Ismail Zibaii;Mohammad-Mahdi Babakhani-Fard;Azam Layeghi;Fatemeh Arefnia;Roksana Esmaeilpour;Hamid Latifi

{"title":"Concave-Tip Optical Fiber Apta-Biosensor Based on Localized Surface Plasmon Resonance for the Detection of Dopamine","authors":"Soroush Rostami;Mohammad Ismail Zibaii;Mohammad-Mahdi Babakhani-Fard;Azam Layeghi;Fatemeh Arefnia;Roksana Esmaeilpour;Hamid Latifi","doi":"10.1109/JLT.2025.3590515","DOIUrl":"https://doi.org/10.1109/JLT.2025.3590515","url":null,"abstract":"This paper presents an enhanced concave tip optical fiber (CTOF) probe for dopamine (DA) detection based on localized surface plasmon resonance (LSPR) and DNA aptamers as sensing elements. The CTOF probe was fabricated using chemical etching and optimized for the confinement factor to improve the refractive index (RI) sensitivity by enhancing the LSPR field. The RI sensitivity of the LSPR-CTOF sensor, measured in the range of 1.3332-1.3604 RIU, was obtained at 1716 nm/RIU, demonstrating a 323.9% increase compared to the conventional flat tip fiber (FTF) structure. Fiber optic sensing probes were created by immobilizing the Au nanoparticles (AuNPs) and specific DNA aptamers on the tip of the fiber. The DA sensitivity of the sensor was obtained at 1.78 nm/log(M) across a wide concentration range of 100 fM-1mM. Additionally, the limit of detection and quantification were achieved at 2.5 fM and 16.3 fM, respectively. The selectivity of the sensor was evaluated using ascorbic acid and epinephrine. Moreover, repeatability and stability were studied in detail. These findings show that these Apta-biosensors based on LSPR are good candidates for in-vivo DA detection.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8942-8950"},"PeriodicalIF":4.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909368","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

Cladding-Free Unidirectional Waves Enabled by Artificial Gauge Fields in Tilted Grating Structures 倾斜光栅结构中人工规范场产生的无包层单向波

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-17 DOI: 10.1109/JLT.2025.3590347

Ke Xu;Miao Liu;Hao Ren;Jian Feng;Xuesong Deng;Ming Fang;Zhixiang Huang

{"title":"Cladding-Free Unidirectional Waves Enabled by Artificial Gauge Fields in Tilted Grating Structures","authors":"Ke Xu;Miao Liu;Hao Ren;Jian Feng;Xuesong Deng;Ming Fang;Zhixiang Huang","doi":"10.1109/JLT.2025.3590347","DOIUrl":"https://doi.org/10.1109/JLT.2025.3590347","url":null,"abstract":"Conventional dielectric waveguides confine electromagnetic waves through refractive index contrast between core and cladding materials, yet inherently lack nonreciprocal transmission capabilities. In this study, we demonstrate a waveguide system engineered via artificial gauge fields that achieves simultaneous optical confinement and nonreciprocal propagation without requiring additional cladding structures, thereby substantially reducing system complexity. Theoretical analysis and experimental verification reveal that directly tilted structures effectively generate gauge fields to modify dispersion relations, thereby eliminating backward propagation channels and ensuring robust unidirectional wave propagation. Our experimental results closely align with the physical model predictions, validating the accuracy of our methodology. Compared with traditional dielectric waveguides, the structural simplicity of our design significantly reduces fabrication complexity, making it particularly suitable for integrated photonic circuits and advanced optical systems. This research establishes an effective strategy for realizing unidirectional wave propagation, thus providing a novel paradigm for developing next-generation photonic devices.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8864-8868"},"PeriodicalIF":4.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909036","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

Enhanced Thermal Management in Semiconductor Lasers via Distributed Waveguide Design 通过分布式波导设计增强半导体激光器的热管理

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-17 DOI: 10.1109/JLT.2025.3590320

Osama Aadil Saadi;Ali Kaan Sünnetçioğlu;Kaveh Ebadi;Amina Houimi;Abdullah Demir

{"title":"Enhanced Thermal Management in Semiconductor Lasers via Distributed Waveguide Design","authors":"Osama Aadil Saadi;Ali Kaan Sünnetçioğlu;Kaveh Ebadi;Amina Houimi;Abdullah Demir","doi":"10.1109/JLT.2025.3590320","DOIUrl":"https://doi.org/10.1109/JLT.2025.3590320","url":null,"abstract":"Semiconductor lasers are indispensable in modern photonics due to their high efficiency and compact form factor. However, their performance is fundamentally constrained by self-heating, which limits output power, efficiency, and device lifetime. Although increasing cavity length can theoretically improve thermal dissipation, high-power GaAs lasers experience severe performance degradation beyond 5–6 mm due to spatial hole burning and nonlinear effects. Here, we introduce a distributed waveguide (DWG) architecture that redefines long-cavity semiconductor laser design, overcoming the traditional cavity-length barrier and enabling efficient heat dissipation without compromising optical performance. The DWG approach electrically isolates lasing and secondary sections for independent current control while preserving optical coupling, thereby extending functionality beyond conventional semiconductor laser designs. The lasing sections generate the laser output, while secondary sections, biased near the lasing threshold, act as auxiliary thermal pathways with negligible heat generation. By leveraging these secondary sections for enhanced thermal management, DWG provides unprecedented control over cavity length, heat dissipation, and potentially device reliability. Experimental and numerical results demonstrate that extending the cavity length from 4 to 8 mm using DWG reduces junction temperature rise by half, with possible further reductions through optimized DWG design. These findings establish DWG as a disruptive innovation in photonic waveguide engineering, providing a scalable platform for high-efficiency, high-reliability semiconductor laser architectures.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 19","pages":"9276-9281"},"PeriodicalIF":4.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061917","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-Frequency-Drift Compensation in Φ-OTDR Using Linear Fitting Intercepts Method 利用线性拟合截距法进行Φ-OTDR激光频率漂移补偿

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-17 DOI: 10.1109/JLT.2025.3590032

Qi Mu;Deyu Xu;Feihong Yu;Jiayao Sun;Jingming Zhang;Zetian Sang;Xingwei Chen;Huaxin Gu;Ke Yi;Liyang Shao

{"title":"Laser-Frequency-Drift Compensation in Φ-OTDR Using Linear Fitting Intercepts Method","authors":"Qi Mu;Deyu Xu;Feihong Yu;Jiayao Sun;Jingming Zhang;Zetian Sang;Xingwei Chen;Huaxin Gu;Ke Yi;Liyang Shao","doi":"10.1109/JLT.2025.3590032","DOIUrl":"https://doi.org/10.1109/JLT.2025.3590032","url":null,"abstract":"With many significant advantages, the phase-sensitive optical time-domain reflectometry (Φ-OTDR) system has become a popular monitoring instrument, especially in geophysical research, such as seismic wave observation. In some scenarios, low-frequency vibration detection provides important clues for analyzing changes in target behavior. However, the ever-present frequency drift in lasers poses a challenge for sub-hertz vibration detection. In this paper, we propose a linear fitting method for taking intercepts to reduce the influence of laser frequency drift in heterodyne Φ-OTDR systems. Experimental results show that the method can effectively improve the signal-to-noise ratio (SNR) of 0.5 Hz sinusoidal signals by 23.909 dB over a 5 km long sensing fiber. Additionally, the variance of the compensation results at 40 different positions is 0.666 (dB)2, which is 15.6 times better than the variance of 10.397 (dB)2 obtained using the conventional compensation method under the same conditions, indicating good stability in compensation at different positions. Using this method, we also succeeded in improving the SNR of the perturbed signals of 0.1 Hz and 0.05 Hz by 8.575 dB and 6.056 dB, respectively, at 2 km, effectively reducing the distortion of the original demodulation curves. Benefiting from this, the proposed method can further improve the low-frequency detection performance of the Φ-OTDR system.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8991-8997"},"PeriodicalIF":4.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909100","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

Tunable Hz Intrinsic Linewidth Single-Polarization Linear Cavity Fiber Laser Based on Parity-Time Symmetric Optics With a High-Q Microresonator 基于奇偶时间对称光学高q微谐振腔的可调谐Hz本征线宽单偏振线性腔光纤激光器

IF 4.8 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-07-17 DOI: 10.1109/JLT.2025.3590173

Laiyang Dang;Dongmei Huang;Wenhao Zhu;Feng Li;Xiaofan Zhang;Zhenda Xie;Kunpeng Jia

{"title":"Tunable Hz Intrinsic Linewidth Single-Polarization Linear Cavity Fiber Laser Based on Parity-Time Symmetric Optics With a High-Q Microresonator","authors":"Laiyang Dang;Dongmei Huang;Wenhao Zhu;Feng Li;Xiaofan Zhang;Zhenda Xie;Kunpeng Jia","doi":"10.1109/JLT.2025.3590173","DOIUrl":"https://doi.org/10.1109/JLT.2025.3590173","url":null,"abstract":"High-performance tunable fiber laser with ultra-narrow linewidth and single polarization is driving the progress in fundamental research and engineering applications. However, it is still challenging to achieve single polarization tunable fiber laser due to the redundant laser cavity and the lack of polarization selectivity of ordinary optical fibers. Here, we propose and demonstrate a novel scheme for the generation of an ultra-narrow linewidth and single polarization linear cavity fiber laser based on parity-time (PT) symmetry in combination with a high-Q Fabry Pérot (FP) resonator. The PT symmetry can be achieved between two subspaces in a single physical loop based on optical polarization diversity and controllability. Benefitting from the FP resonator with a high Q factor of 107, the measured laser side mode suppression ratio reaches 73.3 dB and the high frequency white noise floor is ∼2.62 Hz2/Hz, corresponding to an intrinsic linewidth of about 8.2 Hz. The laser output has a high polarization extinction ratio of ∼35.46 dB and its maximum output power fluctuation is less than 1.6% over more than 60 min due to the high polarization sensitivity of the FP resonator. The wavelength tuning range is 52.15 nm (from 1523.95 to 1576.1 nm), covering the entire flat region of the erbium doped gain fiber. The proposed PT-symmetric system realizes an ultra-narrow linewidth and single-polarization tunable single-frequency fiber laser in a robust and efficient way, which provides a new insight to improve the performance of other laser sources.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 18","pages":"8849-8856"},"PeriodicalIF":4.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909232","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