Optical Fiber Technology最新文献

{"title":"Numerical investigation of dissipative soliton explosion mechanisms in a bidirectional mode-locked fiber laser","authors":"Min Luo,&nbsp;Wen-Jin Wang,&nbsp;Yong Wei","doi":"10.1016/j.yofte.2025.104440","DOIUrl":"10.1016/j.yofte.2025.104440","url":null,"abstract":"<div><div>Soliton explosions, as key phenomena in dissipative systems, attract significant research interest in nonlinear optics owing to their complex evolution. Here, we construct a theoretical model for a bidirectional mode-locked fiber laser to investigate soliton explosions. By tuning intracavity parameters, stable dissipative solitons (DSs) propagating in both clockwise (CW) and counterclockwise (CCW) directions are achieved. By increasing the intracavity gain saturation energy (<em>E</em>_s), the stable DSs evolved into an explosion state, with the bidirectional explosions being largely synchronized. A further increase in <em>E</em>_s drives bidirectional DSs into successive explosion and ultimately chaotic regimes, propelled by high nonlinear effects. Owing to distinct propagation paths, the bidirectional DSs exhibit asynchronous evolution in this regime. Our findings demonstrate that modulating nonlinear effects enables control of soliton explosion behavior in bidirectional lasers, providing both theoretical insights and practical guidance for dual-comb source applications.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104440"},"PeriodicalIF":2.7,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267586","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}

{"title":"Highly Yb-doped silica-based fibers for ultra-short lasers and amplifiers","authors":"Mikhail E. Likhachev ,&nbsp;Egor K. Mikhailov ,&nbsp;Tatiana S. Zaushitsyna ,&nbsp;Vitaliya A. Agakhanova ,&nbsp;Lyudmila D. Iskhakova ,&nbsp;Mikhail M. Bubnov ,&nbsp;Alexey S. Lobanov ,&nbsp;Andrey A. Umnikov ,&nbsp;Denis S. Lipatov","doi":"10.1016/j.yofte.2025.104427","DOIUrl":"10.1016/j.yofte.2025.104427","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104427"},"PeriodicalIF":2.7,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267582","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}

{"title":"Experimental demonstration of reservoir computing based on VCSEL for nonlinear fiber distortion compensation","authors":"Qing Yang ,&nbsp;Xing Xing Guo ,&nbsp;Shui Ying Xiang ,&nbsp;Ya Hui Zhang ,&nbsp;Ling Zheng ,&nbsp;Han Xu Zhou ,&nbsp;Zhi Wei Dai ,&nbsp;Li Cun Yu ,&nbsp;Yue Hao","doi":"10.1016/j.yofte.2025.104430","DOIUrl":"10.1016/j.yofte.2025.104430","url":null,"abstract":"<div><div>Reservoir Computing (RC) has attracted considerable attention owing to its low energy consumption and rapid learning capabilities. In this paper, we have proposed and experimentally investigated a time delay reservoir computing (TD-RC) system based on a vertical cavity surface emitting laser (VCSEL) to compensate for the optical signal distortions that arise from transmission through long optical fibers. Our findings indicate that optimizing the external injection strength and feedback strength significantly improves the accuracy of signal recovery. Through parameter tuning, the experiment can reduce the symbol error rate (SER) of the nonlinear fiber compensation task to 0.064. The proposed TD-RC system based on VCSEL holds significant potential for improving the performance of fiber optic compensation technology in the future, as it demonstrates favorable compensation performance in practice.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104430"},"PeriodicalIF":2.7,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267579","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}

{"title":"A survey of PCF-based sensors for various disease detection applications","authors":"Sreevani Alluru ,&nbsp;Siva Prasad Valluri","doi":"10.1016/j.yofte.2025.104439","DOIUrl":"10.1016/j.yofte.2025.104439","url":null,"abstract":"<div><div>Photonic crystal fibers (PCFs) have emerged as transformative tools for biomedical monitoring, offering exceptional sensitivity and versatility. This review examines the first comprehensive survey of PCF-based sensors designed explicitly for disease detection, including cancer, malaria, Alzheimer’s disease, COVID-19, brain tumors, and physiological parameters. Key design parameters, including core geometry, material selection, and functional coatings, are analyzed to elucidate their impact on performance metrics such as refractive index sensitivity, detection limit, and spectral response. Additionally, this review highlights the computation of essential characteristics namely confinement loss, relative sensitivity, wavelength sensitivity, and amplitude sensitivity, providing a comprehensive perspective on their capabilities and applications. This review also addresses the limitations, problems, and advantages of the various PCF structures. Finally, we discuss fabrication challenges and outline future opportunities, including Artificial Intelligence (AI) integration and multi-disease biosensing.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104439"},"PeriodicalIF":2.7,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267585","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}

{"title":"Design and implementation of a spiral-structured fiber-optic Fabry–Perot accelerometer for high sensitivity and low cross-axis interference","authors":"Xue Wang,&nbsp;Jiahui Qu,&nbsp;Zhengrong Tong,&nbsp;Weihua Zhang,&nbsp;Lei Jing,&nbsp;Xiaonuo Gao","doi":"10.1016/j.yofte.2025.104424","DOIUrl":"10.1016/j.yofte.2025.104424","url":null,"abstract":"<div><div>A high-sensitivity fiber Fabry–Perot accelerometer based on involute beams is proposed. The proposed sensor mainly consists of a stainless steel elastic diaphragm and mass blocks adhered to both sides of the diaphragm symmetrically. The fiber end-face is parallel to the surface of the mass block, and the incident light is reflected by the surface of the mass block to form Fabry–Perot interferometer. In order to improve axial sensitivity and reduce transverse interference, a generalized involute model is proposed based on the mathematical model of the involute curve, which maximizes the length of the elastic beam in the finite area of the diaphragm and reduces transverse interference by optimizing the number of elastic beams. The performance of the sensor is simulated and experimentally verified. The results indicate that the natural frequency of the sensor is 120 Hz, the axial sensitivity is <span><math><mrow><mn>13</mn><mo>.</mo><mn>39</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>/<span><math><mi>g</mi></math></span>, and the transverse crosstalk is less than 5% of the axial sensitivity. This sensor has good application prospects in low-frequency vibration scenarios of structural health or earthquake monitoring.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104424"},"PeriodicalIF":2.7,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267580","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}

{"title":"Ultra-broadband simple hexagonal dual core photonic crystal fiber mid-infrared polarization beam splitter based on surface plasmon resonance","authors":"Yuwei Qu ,&nbsp;Chunlan Zhang ,&nbsp;Hui Li ,&nbsp;Jinhui Yuan ,&nbsp;Binbin Yan ,&nbsp;Xinzhu Sang ,&nbsp;Kuiru Wang ,&nbsp;Chongxiu Yu","doi":"10.1016/j.yofte.2025.104437","DOIUrl":"10.1016/j.yofte.2025.104437","url":null,"abstract":"<div><div>In this paper, an ultra-broadband simple hexagonal dual core photonic crystal fiber mid-infrared polarization beam splitter (SH-DC-PCF MIR-PBS) based on surface plasmon resonance (SPR) is proposed. Based on the SPR and DC-PCF coupled-mode theories, the polarization splitting performance can be achieved by utilizing the different mode coupling characteristics between the X-polarization (X-P) and Y-polarization (Y-P) odd modes and even modes, and 2nd-order surface plasmon polariton modes. The change rules of coupling lengths of the X-P and Y-P and the coupling length ratio with different structural parameters are summarized. The change rules of the extinction ratio (<em>ER</em>s) of the cores A and B with wavelength when the splitting length (<em>L</em>_S) is between 172–184 μm are discussed. The simulation results indicate that the fianl <em>L</em>_S is 179 μm, the splitting bandwidth of the cores A and B are 864 nm (3.397–4.261 μm) and 727 nm (3.447–4.174 μm), and the maximum insertion losses of the cores A and B are 0.17 and 0.015 dB, respectively. When the <em>Λ</em> changes ± 1 % or <em>t</em> changes ± 3 %, the proposed SH-DC-PCF MIR-PBS has good fabrication error-tolerant rate. The proposed SH-DC-PCF MIR-PBS not only achieves ultra-wide splitting bandwidth of the cores A and B, but also has ultra-low insertion loss, ultra-short <em>L</em>_S, and a easy to fabricate simple structure, so it is expected to have important application value in MIR spectroscopy related fields such as biomedicine imaging, fiber sensing, and environmental monitoring.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104437"},"PeriodicalIF":2.7,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267583","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}

{"title":"Quantitative analysis of albumin and glucose based on near-infrared fibre-optic SPR sensing","authors":"Yansong Yue ,&nbsp;Xu Ma ,&nbsp;Xianwen Zhang ,&nbsp;Zhushanying Zhang ,&nbsp;Zhifan Zhou ,&nbsp;Chao Yang ,&nbsp;Yuan Gao ,&nbsp;Huimin Cao","doi":"10.1016/j.yofte.2025.104436","DOIUrl":"10.1016/j.yofte.2025.104436","url":null,"abstract":"<div><div>Blood component analysis is a critical tool for disease diagnosis. Infrared spectroscopy, combined with fibre optic sensing, offers rapid, non-destructive, and accurate blood biochemical analysis; however, traditional devices face challenges in miniaturisation, cost, and noise interference. This study developed a near-infrared fibre optic SPR sensing system to address these issues, optimising fibre processing and coating for enhanced performance in clinical diagnostics. Fibres were etched with HF acid to vary core diameters, and silver nanoparticles were modified on fibre surfaces under different pH conditions. A multimode fibre-based SPR system was constructed for the quantitative analysis of albumin and glucose, and the results were compared with those obtained using a spectrometer. Fibres etched for 80 min with silver nanoparticles (approximately 45 nm) in a pH nine environment achieved optimal detection, enhancing sensor sensitivity via surface plasmon effects. A comparative analysis showed that the SPR system outperformed the spectrometer. For albumin, the spectrometer yielded an <em>R</em>p of 0.8693 and RMSEP of 467.738 mg/dL, while the SPR system achieved an <em>R</em>p of 0.8980 and RMSEP of 427.5705 mg/dL. For glucose, the spectrometer recorded an <em>R</em>p of 0.5951 and RMSEP of 96.3892 mg/dL, whereas the SPR system achieved an <em>R</em>p of 0.9073 and RMSEP of 56.7273 mg/dL. These findings indicate that the silver nanoparticle-modified fibre-optic SPR system offers superior accuracy and stability compared to conventional spectroscopy, providing a high-precision, portable solution for blood biochemical analysis.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104436"},"PeriodicalIF":2.7,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267584","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}

{"title":"Polyimide tube-encapsulated FBG sensor with temperature compensation based on OCMI and Vernier effect for humidity measurement","authors":"ShiTong Zhong ,&nbsp;GongQiang Li ,&nbsp;HaiTao Yan ,&nbsp;DaoFu Han","doi":"10.1016/j.yofte.2025.104426","DOIUrl":"10.1016/j.yofte.2025.104426","url":null,"abstract":"<div><div>We propose a humidity sensor with temperature compensation based on optical carrier interference (OCMI) and an enhanced Vernier effect. The sensor head consists of a sensing fiber Bragg grating (FBG) bonded with a polyimide (PI) tube and two reference FBGs with special packaging. The interferograms formed by the two reference FBGs and the sensing FBG superimpose to generate a Vernier effect. Due to the opposite directional shifts of the two interferograms with respect to humidity variations, an enhanced Vernier effect is further achieved. The humidity sensitivity of the enhanced Vernier effect is −3.867 MHz/%RH amplified by a factor −56.7 and 56.8 respectively compared to the individual OCMIs. The temperature sensitivity of the reference FBGs with specialized packaging closely matches that of the sensing FBG, ensuring effective temperature compensation within the system.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104426"},"PeriodicalIF":2.7,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267581","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}

{"title":"Invited Paper: Polarization maintaining large mode area Yb fibers for all fiber nanosecond pulse amplification","authors":"Erin S. Lamb ,&nbsp;Yaakov Glick ,&nbsp;Jose Pincha ,&nbsp;Ishu Goel ,&nbsp;Robert S. Windeler ,&nbsp;Simona Ovtar ,&nbsp;Vasiliy Lukonin ,&nbsp;Ian Sun ,&nbsp;Shantanu Pandit ,&nbsp;Jeffrey W. Nicholson","doi":"10.1016/j.yofte.2025.104420","DOIUrl":"10.1016/j.yofte.2025.104420","url":null,"abstract":"<div><div>Polarization maintaining (PM), all-fiber amplifiers offer the benefits of alignment free and environmentally stable operation. To achieve high output powers, particularly in pulsed operation, it is necessary to balance the need to reduce deleterious nonlinear effects, often through the use of large mode area (LMA) fibers, with the onset of transverse mode instability whereby higher order modes (HOMs) mix with the desired fundamental mode output. Over the last few years, advances in high HOM loss, ytterbium-doped LMA fibers have enabled continuous wave (CW) output powers up to 5 kW and pulse energies up to 2 mJ in non-PM fibers. In CW operation, LMA PM fibers have shown up to 2 kW of average power. In this contribution, we present all-fiber nanosecond pulsed amplification in a high HOM loss, Yb-doped LMA fiber with a 26 <!--> <span><math><mi>μ</mi></math></span>m mode field diameter and 2.4 dB/m of pump absorption at 976 nm, achieving 1 mJ of pulse energy at 1 kW of average power, and 1.5 mJ of pulse energy at 750 W of average power. The polarization extinction ratios were 20 dB or higher and the M² was near the diffraction limit. We measured the in-pulse to out-of-pulse energy and found 99.9% or more of the measured power remained in-pulse.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104420"},"PeriodicalIF":2.7,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267587","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}

{"title":"Study on thermal effect and optical attenuation characteristics of SiO2-GeO2 single-mode fiber for silicon photonic modulator","authors":"Yi-An Chan,&nbsp;Fei-Yi Hung,&nbsp;Bo-Ding Wu","doi":"10.1016/j.yofte.2025.104421","DOIUrl":"10.1016/j.yofte.2025.104421","url":null,"abstract":"<div><div>Optical fibers are critical components of silicon photonic modulators. To investigate the effects of copper wire Joule heating and electro-optical energy conversion loss on optical fibers, communication single-mode fiber (C-SMF) and waveguide single-mode fiber (W-SMF) were selected for the experiments in this study. The core diameter of the C-SMF was 9  μm, whereas that of the W-SMF was 8.2 μm; both fibers had an overall diameter of 125  μm. Both fiber cores were composed of 96 wt% SiO₂ and 4 wt% GeO₂, while their claddings are made of 100 wt% SiO₂. In this study, a transmission electron microscope (TEM) was used to perform elemental analysis of the cores, and the mechanical properties and crystallinity of the fibers were compared. Various heating effects were simulated through heat treatment, thermal cycling, and point-heating tests to investigate the changes in the properties of the fibers. In addition, a self-designed polymer-based photonic integrated circuit (PIC) chip was used to analyze the core morphology and observe the light profile.</div><div>The results indicate that C-SMF exhibits lower tensile strength but higher elongation, whereas the center of W-SMF contains SiO structures that absorb optical signals and reduce transmission efficiency under high-temperature conditions. Owing to the rapid cooling after the thermal treatment, the fibers could not form stable structures, leading to reductions in both the crystallinity and tensile properties. The crystallinity decreased owing to the impact of thermal stress on the structure after 100 cycles of the thermal cycling test (TCT). After TCT 700 cycles, the slow diffusion of Ge and the localized Ge-rich area promoted grain growth in the W-SMF. Regarding optical attenuation, the W-SMF showed improved performance after thermal treatment owing to defect reduction through the annealing effect. However, prolonged high-temperature exposure leads to significant Ge diffusion, increased defect density, and refractive index fluctuations, ultimately leading to optical attenuation degradation. In addition to the annealing effect observed after three-point heating, the refractive index difference between the core and cladding increased, resulting in a more stable optical signal. The PIC light profile confirmed that the optical signal was transmitted not only through the core but also through the cladding, and the signal was transmitted in the fundamental mode. This study confirms the high-temperature applicability of optical fibers in silicon photonic modulators and the compatibility of optical fibers and PICs.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104421"},"PeriodicalIF":2.7,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267601","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}