Optical Fiber Technology最新文献_第5页

Crack monitoring in cement mortar under impact loading using distributed optical fiber sensing 基于分布式光纤传感的冲击载荷下水泥砂浆裂缝监测

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-11 DOI: 10.1016/j.yofte.2025.104386

Jin. Li , Liyun. Yang , Jinjing. Zuo , Renshu. Yang , Xiang. Zhang , Yuanyuan. You , Yiqiang Kang

{"title":"Crack monitoring in cement mortar under impact loading using distributed optical fiber sensing","authors":"Jin. Li , Liyun. Yang , Jinjing. Zuo , Renshu. Yang , Xiang. Zhang , Yuanyuan. You , Yiqiang Kang","doi":"10.1016/j.yofte.2025.104386","DOIUrl":"10.1016/j.yofte.2025.104386","url":null,"abstract":"<div><div>Distributed fiber-optic sensing techniques based on Rayleigh scattering are widely used to monitor strain field evolution caused by crack initiation and propagation in structures. However, a universal specimen design for crack identification and monitoring under dynamic loading remains lacking. This study investigates the feasibility of using the optical frequency domain reflectometry (OFDR) technique for crack monitoring in cement mortar samples subjected to drop-hammer three-point bending tests. Experiments were conducted on samples embedded with distributed optical fiber sensors of varying diameters. The strain distribution was accurately captured using 2 mm and 2.5 mm optical fibers, allowing for crack detection at peak strain values and precise localization. The discrepancy between the actual crack position and the peak strain location was within 2 mm, while the error between the calculated and measured crack opening displacement (COD) remained within ±10 %. These findings confirm that OFDR enables accurate identification of crack location and width under impact loading. Moreover, the technique can predict crack initiation and propagation trends, demonstrating its potential for dynamic structural health monitoring.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104386"},"PeriodicalIF":2.7,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sub-millisecond response fiber-optic temperature sensor based on microfabricated silicon Fabry-Pérot interferometer 基于微晶硅法布里-波干涉仪的亚毫秒响应光纤温度传感器

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-09 DOI: 10.1016/j.yofte.2025.104401

Shuyi Zhou , Feng Zhang , Junyi Li , Haotian Gong , Xinling Gu , Wenke Xie , Boxun Li , Zhengzheng Shao

{"title":"Sub-millisecond response fiber-optic temperature sensor based on microfabricated silicon Fabry-Pérot interferometer","authors":"Shuyi Zhou , Feng Zhang , Junyi Li , Haotian Gong , Xinling Gu , Wenke Xie , Boxun Li , Zhengzheng Shao","doi":"10.1016/j.yofte.2025.104401","DOIUrl":"10.1016/j.yofte.2025.104401","url":null,"abstract":"<div><div>This study proposes a novel fiber-optic temperature sensor based on a microfabricated short-cavity silicon Fabry-Pérot interferometer (FPI), achieving miniaturized sensing unit and sub-millisecond response. The sensor employs micro-electromechanical systems (MEMS) technology and fiber-waveguide coupling technology to fabricate a 17-μm-length and 125-μm-diameter silicon-based FPI on the fiber tip. By significantly reducing the cavity length of the FPI, the free spectral range (FSR) is markedly expanded, enabling temperature demodulation through intensity measurement while maintaining a broad monotonic measurement range. Experimental results show that the sensor has an FSR of 19.8 nm near 1550 nm with 20.0 dB modulation depth. The sensor exhibits monotonicity within a temperature range of 98 ℃ near normal temperature. For establishing the functional relationship between the reflectivity of the sensing head and the ambient temperature, the test data of temperature induced reflectivity variation of the sensor from −5 ℃ to 63 ℃, is fitted by a third-order polynomial. The agreement between the fitting results and experimental data demonstrates that the sensor can be calibrated for measurement within a temperature range of 68 ℃. The temperature stability of the fiber-optic sensor is 0.076 ℃, which means the resolution is better than 0.1 ℃. We also estimate that the average sensitivity of the sensor is approximately 66 mV/℃ under reasonable conditions. Immersion testing by dipping the sensing head quickly into hot water reveals a 0.54 ms response time, which is consistent with theoretical calculations. The standardized fabrication process of the sensor satisfies industrial production requirements. The developed compact, fast-responding fiber-optic temperature sensor demonstrates strong potential for oceanographic temperature monitoring.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104401"},"PeriodicalIF":2.7,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tunable dual-wavelength bismuth-doped fiber laser in O-band using in-line six-mode fiber filter 利用直列六模光纤滤波器可调谐o波段双波长掺铋光纤激光器

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-09 DOI: 10.1016/j.yofte.2025.104393

Harith Ahmad , Bilal Nizamani , Mikhail A. Melkumov , Alexey S. Lobanov

引用次数: 0

Opto-mechano transduction in bioinspired cilia: A fiber-coupled micro-force sensor with tunable sensitivity 生物激发纤毛的光-机械转导：具有可调灵敏度的纤维耦合微力传感器

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-09 DOI: 10.1016/j.yofte.2025.104398

Yuqi You, Di Tong, Wenjie Yang, Yong Feng, Chunbo Su, Chunlian Lu, Tao Geng

引用次数: 0

Harmonic mode-locking in All-PM Er-doped fiber laser NALM configuration 全pm掺铒光纤激光器NALM结构中的谐波锁模

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-08 DOI: 10.1016/j.yofte.2025.104392

V.A. Ribenek , D.A. Korobko , D.A. Stoliarov , P.A. Itrin , G.V. Tertyshnikova , A.A. Fotiadi

{"title":"Harmonic mode-locking in All-PM Er-doped fiber laser NALM configuration","authors":"V.A. Ribenek , D.A. Korobko , D.A. Stoliarov , P.A. Itrin , G.V. Tertyshnikova , A.A. Fotiadi","doi":"10.1016/j.yofte.2025.104392","DOIUrl":"10.1016/j.yofte.2025.104392","url":null,"abstract":"<div><div>It is known that passive harmonic mode-locking (HML) is a widely used technique to achieve high pulse repetition rates in fiber lasers. We present, to the best of our knowledge, the first demonstration of harmonically mode-locked Er-doped fiber laser with sub-GHz repetition rate based on a nonlinear amplified loop mirror (NALM). This fully spliced, polarization-maintaining (PM) fiber configuration operates in a self-starting regime, delivering high-frequency pulse trains with significantly enhanced stability against environmental perturbations. The laser achieves a maximum pulse repetition rate (PRR) of ∼ 630 MHz, corresponding to the 242nd cavity harmonic. Furthermore, we apply a supermode noise mitigation technique using continuous-wave (CW) injection from an external narrow-band source successfully stabilizing the HML operation and reducing timing jitter by more than a factor of two across the entire range of observed repetition rates. This novel design provides a robust, adjustment-free solution for high-frequency operation with exceptional stability, meeting the demands of precision and reliability required for advanced applications.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104392"},"PeriodicalIF":2.7,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145011172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diffraction-limited 308 W at ∼980 nm from a monolithic ytterbium fiber laser 衍射限制308 W在~ 980 nm从单片镱光纤激光器

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-08 DOI: 10.1016/j.yofte.2025.104396

Monica T. Kalichevsky-Dong, Samuel P. Bingham, Thomas W. Hawkins, Jannatul M. Nijhum, Liang Dong

引用次数: 0

Ultra-high-order QAM transmission in C-band IM/DD systems via two-stage delta-sigma modulation 采用两级δ - σ调制的c波段IM/DD系统中的超高阶QAM传输

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-07 DOI: 10.1016/j.yofte.2025.104391

Haolin Bai , Jiahao Huo , Chao Shang , Peng Qin , Xiaoying Zhang , Wei Huangfu , Keping Long

{"title":"Ultra-high-order QAM transmission in C-band IM/DD systems via two-stage delta-sigma modulation","authors":"Haolin Bai , Jiahao Huo , Chao Shang , Peng Qin , Xiaoying Zhang , Wei Huangfu , Keping Long","doi":"10.1016/j.yofte.2025.104391","DOIUrl":"10.1016/j.yofte.2025.104391","url":null,"abstract":"<div><div>Radio-over-Fiber (RoF) schemes have received widespread attention in fronthaul links of fifth-generation (5G) wireless networks due to the advantages of large bandwidth and low transmission loss. To trade off the robustness and spectral efficiency (SE) of ROF, the delta sigma modulation (DSM) has been recognized as a promising alternative to common public radio interface (CPRI) for implementing novel mobile fronthaul (MFH) architectures. In this article, an intensity modulation and direct detection (IM/DD) system with a two-stage DSM structure was proposed. We proposed a two-stage 1-bit DSM to convert high-order Quadrature Amplitude Modulation (QAM) format into 4-level Pulse Amplitude Modulation (PAM-4) format, achieving the transmission of high order QAM signals through IM/DD links. The two-stage DSM architecture achieves a signal-to-noise ratio (SNR) of 58 dB by suppressing in-band quantization noise (QN) introduced through first-stage DSM quantization via subsequent second-stage DSM processing, thereby enabling support for 65536-QAM signal transmission. We demonstrated the transmission of a 56-Gbaud DSM-PAM-4 signal in the C-band over a 2-km fiber link. The results show that the proposed system is capable of supporting up to 65536-QAM signals while achieving a bit error rate (BER) below the hard-decision forward error correction (HD-FEC) threshold of 3.8e-3.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104391"},"PeriodicalIF":2.7,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

1.5 μm ultrafast fiber laser with multi-soliton states based on tellurene saturable absorber 基于碲饱和吸收体的1.5 μm多孤子态超快光纤激光器

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-07 DOI: 10.1016/j.yofte.2025.104394

Hao Tan , Weijie Xu , Shuaimeng Li , Jiayu Shen , Yingfei Zhao , Wenfei Zhang , Caixun Bai , Guomei Wang , Shenggui Fu , Cheng Lu , Huanian Zhang

{"title":"1.5 μm ultrafast fiber laser with multi-soliton states based on tellurene saturable absorber","authors":"Hao Tan , Weijie Xu , Shuaimeng Li , Jiayu Shen , Yingfei Zhao , Wenfei Zhang , Caixun Bai , Guomei Wang , Shenggui Fu , Cheng Lu , Huanian Zhang","doi":"10.1016/j.yofte.2025.104394","DOIUrl":"10.1016/j.yofte.2025.104394","url":null,"abstract":"<div><div>With the increasing research on two-dimensional layered elemental materials (Xenes) in recent years, their application scenarios have become increasingly diverse. For example, tellurene, as a high-performance saturable absorber, has demonstrated significant potential in passively mode-locked fiber lasers due to its tunable bandgap, particularly exhibiting excellent absorption characteristics in the near-infrared region. However, current studies on tellurene in the field of ultrafast lasers remain relatively limited. In this work, tellurene was thoroughly characterized, and a saturable absorber was fabricated based on a tapered fiber via the optical deposition method. Under different polarization states, six types of conventional soliton pulses were obtained, with the narrowest pulse width reaching 954 fs. Additionally, by increasing the pump power and adjusting the intra-cavity polarization state, harmonic mode-locking and bound-state soliton mode-locking were achieved. Experimental results demonstrate that the tellurene-based saturable absorber exhibits excellent pulse modulation capability in the 1.5 μm wavelength region and indicate that tellurene-based fiber lasers represent a promising platform for soliton dynamics research.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104394"},"PeriodicalIF":2.7,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145011168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vernier-effect-enhanced PMMA-filled optical fiber dual-FPI for ultrasensitive humidity sensing 用于超灵敏湿度传感的游标效应增强pmma填充光纤双fpi

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-06 DOI: 10.1016/j.yofte.2025.104383

Fei Xie, Lili Liang, Rui Liu, Kang Yang, Sumei Jia, Guoyu Li, Yan Li

引用次数: 0

An ultra-compact and highly sensitive magnetic field sensor using a gradient-tapered SMF–TMMF–SMF structure 采用梯度锥形SMF-TMMF-SMF结构的超紧凑高灵敏度磁场传感器

IF 2.7 3区计算机科学

Optical Fiber Technology Pub Date : 2025-09-05 DOI: 10.1016/j.yofte.2025.104387

Chao Feng, Xiufang Wang, Taiji Dong, Haonan Sun, Jiaqi Fan

{"title":"An ultra-compact and highly sensitive magnetic field sensor using a gradient-tapered SMF–TMMF–SMF structure","authors":"Chao Feng, Xiufang Wang, Taiji Dong, Haonan Sun, Jiaqi Fan","doi":"10.1016/j.yofte.2025.104387","DOIUrl":"10.1016/j.yofte.2025.104387","url":null,"abstract":"<div><div>This study proposes an ultra-compact magnetic field sensor based on a single-mode–tapered multimode–single-mode (STMS) structure using a gradient-tapered multimode fiber (TMMF). The sensor employs an axially graded tapering process to finely tune the microstructure of the multimode fiber, which not only enhances modal phase accumulation but also effectively extends the penetration depth of the evanescent field. This leads to a high degree of spatial overlap between the interference phase modulation region and the external magnetic field interaction zone, significantly improving the optical field’s sensitivity to magnetic fluid perturbations and its nonlinear response efficiency. Theoretical modeling and simulation analysis further reveal the critical role of the tapered structure in high-order mode excitation, interference phase evolution, and optical field energy distribution. With a compact length of just 2.843 mm, the sensor exhibits a peak sensitivity of 2.16 nm/mT in the 10–16 mT magnetic field range. The repeatability error is as low as ±0.0136 %, demonstrating outstanding stability and sensing performance.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"95 ","pages":"Article 104387"},"PeriodicalIF":2.7,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0