Optics and Laser Technology最新文献_第7页

Topological flatband of edge states for rainbow trapping in Z2 photonic crystals Z2光子晶体中彩虹阱边缘态的拓扑平带

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113336

Yutao Zhang , Zihang Cui , Wei Guo , Jin Tao , Guozhen Liang , Yongquan Zeng

引用次数: 0

Tailoring microstructures and mechanical properties of laser welded joints in laser powder bed fusion Ti6Al4V alloys 激光粉末床熔合Ti6Al4V合金激光焊接接头的显微组织和力学性能

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113329

Zeqing Yang , Lixia Ma , Zhenfu Shi , Li Cui , Dingyong He , Qing Cao

{"title":"Tailoring microstructures and mechanical properties of laser welded joints in laser powder bed fusion Ti6Al4V alloys","authors":"Zeqing Yang , Lixia Ma , Zhenfu Shi , Li Cui , Dingyong He , Qing Cao","doi":"10.1016/j.optlastec.2025.113329","DOIUrl":"10.1016/j.optlastec.2025.113329","url":null,"abstract":"<div><div>Ti6Al4V alloys fabricated via Laser Powder Bed Fusion (LPBF) exhibit excellent mechanical properties, rendering them highly desirable for advanced engineering applications. However, the relatively limited build size of LPBF components constrains their use in large-scale parts. To address this limitation, the joining of LPBF-fabricated Ti6Al4V alloys using welding technique has emerged as a viable strategy for manufacturing large-scale components. However, the ductility of the welded LPBF Ti6Al4V is significantly reduced after welding as reported in the literature. In this study, a Laser Metal Deposition (LMD) process was employed to weld of LPBF Ti6Al4V alloys, with particular focus on improving the ductility in the welded joints. The microstructure of the WM in the as-welded joint contained continuous grain boundaries α (α<sub>GB</sub>) and coarse Widmanstätten grain boundary α (α<sub>WGB</sub>) with inhomogeneously sized ά martensite, which resulted in a deficiency of ductility. To further enhance ductility, a post-weld annealing heat treatment was conducted at a temperature slightly below the β-transus temperature. This treatment facilitated a transformation of the WM microstructure into a mixture of lamellar and globular α phases with an intergranularly dispersed β phase. During heat treatment, the nucleation mechanism of α<sub>WGB</sub> shifted from induced nucleation to interface instability nucleation. Consequently, the fracture location transitioned from weak interfaces between α<sub>GB</sub> and α<sub>WGB</sub> in the as-welded condition to the α + β basket-weave structures within the β-Ti columnar grains of the WM. Compared to the as-welded joints, the heat-treated joints exhibited a 10 % reduction in Ultimate Tensile Strength (UTS) but demonstrated a remarkable 110 % increase in Elongation Index (EI), achieving a better strength-ductility balance.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113329"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced phase compensation in digital holographic microscopic imaging flow cytometry using radial basis function neural networks 基于径向基函数神经网络增强的数字全息显微成像流式细胞术相位补偿

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113312

Yongan Wen, Yunqi Song, Zixuan Han, Rongke Gao, Feifei Wang, Xiaozhe Chen, Liandong Yu, Yang Lu

{"title":"Enhanced phase compensation in digital holographic microscopic imaging flow cytometry using radial basis function neural networks","authors":"Yongan Wen, Yunqi Song, Zixuan Han, Rongke Gao, Feifei Wang, Xiaozhe Chen, Liandong Yu, Yang Lu","doi":"10.1016/j.optlastec.2025.113312","DOIUrl":"10.1016/j.optlastec.2025.113312","url":null,"abstract":"<div><div>The digital holographic microscopy imaging flow cytometer (DHMIFC) facilitates label-free single-cell analysis of dynamic cell populations through the numerically reconstruction of complex wavefronts. Nevertheless, the recorded wavefronts are frequently affected by primary and higher-order aberrations, along with additional aberrations stemming from the digital holographic microscopy (DHM) optical system and surrounding experimental conditions. This study introduces a phase compensation algorithm leveraging radial basis function (RBF) neural networks to address phase aberrations in the distorted Peak function and holograms of PC3 cells. The performance of this algorithm is systematically compared with principal component analysis (PCA), digital phase mask (DPM), and spectrum centroid method (SCM). Results demonstrate that the proposed algorithm yields superior compensation outcomes. Moreover, the RBF neural network effectively mitigates spatial phase aberrations (SPA) without necessitating prior knowledge of the system’s optical parameters. Additionally, the runtime and interpolation accuracy of the algorithm can be fine-tuned by varying the number of sampling points, highlighting its potential applications in 3D surface reconstruction within DHMIFC.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113312"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Viscosity changes in cervical exfoliated cells: A non-invasive deep learning approach for endometrial cancer detection 宫颈脱落细胞粘度变化：子宫内膜癌检测的非侵入性深度学习方法

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113300

Yuwei Yang , Li Li , Xuan Chu , Yulan Wang , Qiushu Chen , Jiacheng Zhou , Duantao Hou , Wenjia Zhao , Yiyan Fei , Jiong Ma , Lan Mi

{"title":"Viscosity changes in cervical exfoliated cells: A non-invasive deep learning approach for endometrial cancer detection","authors":"Yuwei Yang , Li Li , Xuan Chu , Yulan Wang , Qiushu Chen , Jiacheng Zhou , Duantao Hou , Wenjia Zhao , Yiyan Fei , Jiong Ma , Lan Mi","doi":"10.1016/j.optlastec.2025.113300","DOIUrl":"10.1016/j.optlastec.2025.113300","url":null,"abstract":"<div><div>This study investigates a novel non-invasive screening method for endometrial cancer (EC) based on the theory of field cancerization, utilizing cervical exfoliated cells from a cohort of 96 participants across three hospital branches. Cells were stained with a viscosity-sensitive fluorescent probe, and fluorescence lifetime imaging microscopy (FLIM) was employed to generate a substantial dataset of images. Two deep learning models were developed to predict EC based on these images. The model relying solely on cellular morphology (Model A) demonstrated 98.1 % training accuracy with suboptimal diagnostic performance (AUC = 0.79). In contrast, the advanced model incorporating both cellular morphology and intracellular viscosity information (Model B) achieved superior performance with 99.3 % training accuracy and significantly improved diagnostic capability (AUC = 0.90). External validation of Model B showed complete discrimination between EC and non-EC cases with sensitivity of 100 % (95 % CI:61.0–100 %) and specificity of 100 % (95 % CI:89.6–100 %). The findings underscore the potential of combining morphological and intracellular microenvironment viscosity data to enhance the accuracy of EC detection, offering a promising advance in early cancer screening.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113300"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser-cladding remanufacturing of Rockit® 401 coating on the surface of 1Cr17Ni2 stainless steel 激光熔覆1Cr17Ni2不锈钢表面Rockit®401涂层的再制造

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113306

Zansong Li , Fei Ding , Kai Zhou , Yang Liu , Dongsheng Wang , Shuang Liu , Deqiao Xie , Xuesong Gao , Youwen Yang , Lida Shen

{"title":"Laser-cladding remanufacturing of Rockit® 401 coating on the surface of 1Cr17Ni2 stainless steel","authors":"Zansong Li , Fei Ding , Kai Zhou , Yang Liu , Dongsheng Wang , Shuang Liu , Deqiao Xie , Xuesong Gao , Youwen Yang , Lida Shen","doi":"10.1016/j.optlastec.2025.113306","DOIUrl":"10.1016/j.optlastec.2025.113306","url":null,"abstract":"<div><div>In this study, a Rockit® 401 coating was deposited on the surface of 1Cr17Ni2 stainless steel using the laser-cladding method to enhance its comprehensive performance, and its microstructure and mechanical properties were comprehensively investigated. The results showed that the coating mainly comprised martensite, retained austenite, and eutectic phases (ferrite, Cr<sub>2</sub>B, and (Cr,Fe)<sub>23</sub>C<sub>6</sub>). Additionally, substructures, such as high-density dislocations, stacking faults, and twins, were observed in the coating. The combined effects of solid solution, second-phase, substructure, and fine-grain strengthening significantly improved the mechanical properties of the coating. Notably, the average microhardness of the coating was approximately 1.26 times that of the substrate. The wear rate and wear volume (1.32 × 10<sup>-7</sup> mm<sup>3</sup>N<sup>-1</sup>mm<sup>−1</sup> and 0.816 mm<sup>3</sup>, respectively) were significantly lower than those of the substrate (4.51 × 10<sup>-7</sup> mm<sup>3</sup>N<sup>-1</sup>mm<sup>−1</sup> and 2.79 mm<sup>3</sup>). Characterization of the worn surface revealed that the coating involved three wear mechanisms: adhesive wear, abrasive wear, and oxidative wear. Furthermore, the laser-clad remanufactured specimens exhibited satisfactory tensile properties. The average tensile strength of specimens prepared using two laser-cladding strategies (<span><math><mi>x</mi></math></span> and <span><math><mi>y</mi></math></span> directions) were 100.4 % and 99.4 % of the substrate, respectively. Fracture analysis revealed that the coating mainly underwent intergranular brittle fracture, while the substrate mainly exhibited micro-void coalescence fracture.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113306"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional in-fiber polarization beam splitter using liquid crystal infiltrated dual-core photonic crystal fiber with gold layers and its temperature sensing characteristic 采用金层液晶渗透双核光子晶体光纤的多功能光纤内偏振分束器及其感温特性

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113350

Nan Chen , Wenhui Guo , Hui Chen , Xin Ding , Fan Yang , Yuxin Zhu , Mingxuan Song , Yiming Xu

{"title":"Multifunctional in-fiber polarization beam splitter using liquid crystal infiltrated dual-core photonic crystal fiber with gold layers and its temperature sensing characteristic","authors":"Nan Chen , Wenhui Guo , Hui Chen , Xin Ding , Fan Yang , Yuxin Zhu , Mingxuan Song , Yiming Xu","doi":"10.1016/j.optlastec.2025.113350","DOIUrl":"10.1016/j.optlastec.2025.113350","url":null,"abstract":"<div><div>This work presents a compact polarization beam splitter using liquid crystal infiltrated dual-core photonic crystal fiber with gold layers. The finite element tool is utilized to analyze the in-fiber coupling characteristics, aiming to investigate the beam splitting performance and sensing capabilities. Simulation results indicate that when the appropriate structural parameters are determined, the coupling length ratio at 1.55 μm is approximately equal to 2 and the minimum length of 14.43 μm can be achieved. Both cores exhibit excellent beam splitting performance. In core A, the maximum extinction ratio of 89.04 dB is achieved with a bandwidth of 180 nm covering the S, C, and L bands. In core B, the maximum extinction ratio of 80.03 dB is achieved with a bandwidth of 240 nm fully covering the S, C, L, and U bands. Simultaneously, as a temperature sensor, it has a sensitivity of 2.1 nm/℃ and a high linearity of 0.99573. Additionally, with the use of the existing process, this splitter can be manufactured. There are reasons to believe that this multifunctional all-fiber device is anticipated to be one of key components in photonic integration, all-optical networks, and distributed sensing.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113350"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Five-wavelength laser interferometry for the demodulation of dual-cavity extrinsic Fabry–Perot interferometric sensors 双腔外源法布里-珀罗干涉传感器解调的五波长激光干涉

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113286

Yang Han , Yi Jiang , Jingshan Jia , Yutong Zhang

引用次数: 0

Dual surface modification of medical-grade PEEK: Nanosecond laser pre-treatment and hydrothermal hydroxyapatite coating 医用级PEEK的双重表面改性：纳秒激光预处理和水热羟基磷灰石涂层

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113307

Weixuan Zhang , Kun Gao , Xiaohong Li , Jihan Liao , Guoqiang Li

{"title":"Dual surface modification of medical-grade PEEK: Nanosecond laser pre-treatment and hydrothermal hydroxyapatite coating","authors":"Weixuan Zhang , Kun Gao , Xiaohong Li , Jihan Liao , Guoqiang Li","doi":"10.1016/j.optlastec.2025.113307","DOIUrl":"10.1016/j.optlastec.2025.113307","url":null,"abstract":"<div><div>Polyetheretherketone (PEEK) is a high-performance biomedical material, yet its clinical utility is constrained by inherent bioinertness. In this study, we propose a dual modification strategy combining nanosecond laser treatment with hydrothermal synthesis of hydroxyapatite (HA). Nanosecond laser treatment was used to increase the surface roughness and hydrophilicity of PEEK, while introducing amorphous carbon and hydroxyl functional groups to enhance its calcium-phosphorus deposition capability. Subsequently, a dense and continuous HA coating was deposited on the laser-treated PEEK surface via hydrothermal synthesis. The results demonstrated that the laser-treated PEEK surface substantially enhanced the bonding strength with the HA coating, thereby improving the bioactivity of PEEK. Further characterization analyses, including X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), revealed that changes in the chemical composition and crystal structure of the PEEK surface during the modification process were key factors in improving the quality of the HA coating. Our proposed method is cost-effective, non-cytotoxic, and scalable, offering a high-performance solution for PEEK applications in the medical field, such as bone tissue repair and implant enhancement. It also provides new insights into the development of advanced medical polymer materials.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113307"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review of recent advances in ZnO-based thin film photodetectors: Preparation, structure and strategies for performance enhancement zno基薄膜光电探测器的制备、结构和性能增强策略

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113352

Xinnan Shi, Leyao Wu, Peiqing Hong, Feng Teng, Peng Hu, Haibo Fan

{"title":"A review of recent advances in ZnO-based thin film photodetectors: Preparation, structure and strategies for performance enhancement","authors":"Xinnan Shi, Leyao Wu, Peiqing Hong, Feng Teng, Peng Hu, Haibo Fan","doi":"10.1016/j.optlastec.2025.113352","DOIUrl":"10.1016/j.optlastec.2025.113352","url":null,"abstract":"<div><div>Ultraviolet (UV) photodetectors (PDs) serve as pivotal components in optoelectronic systems, enabling critical functionalities in environmental monitoring, optical communication, and defense technologies. Zinc Oxide (ZnO), known for its wide bandgap (3.37 eV), high exciton binding energy (60 meV), and compatibility with scalable fabrication techniques, has emerged as a possible candidate for UV detection. The ZnO thin film detector mainly has the advantages of simple preparation, good consistency, suitability for various substrates, etc. However, it still faces the disadvantage of slow response speed of ZnO itself. To obtain the solution to this problem, this review studies the photodetectors based on ZnO thin films in recent years and analyzes the methods to improve the photoelectric performance and accelerate the response speed, mainly divided into five structures: interface modification of ZnO nanoparticles (NPs), elemental doping of ZnO NPs, interlayer of ZnO film, above-surface modification and heterojunctions of ZnO film, and bottom-surface modification of ZnO film. Furthermore, this paper points out the future development directions of ZnO-based thin film photodetectors from four aspects: deep ultraviolet, wide spectrum, flexibility, and self-powered, aiming to provide strategies for the performance optimization and future applications of photodetectors.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113352"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimized Laser Speckle Rheology Measurement Based on Speckle Pattern’s Gamma Correction and Neural Network 基于散斑模式伽玛校正和神经网络的激光散斑流变性优化测量

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113320

Tianliang Wang, Thomas Goudoulas, Arash Moeini, Dominik Geier, Ehsan Fattahi, Thomas Becker

{"title":"Optimized Laser Speckle Rheology Measurement Based on Speckle Pattern’s Gamma Correction and Neural Network","authors":"Tianliang Wang, Thomas Goudoulas, Arash Moeini, Dominik Geier, Ehsan Fattahi, Thomas Becker","doi":"10.1016/j.optlastec.2025.113320","DOIUrl":"10.1016/j.optlastec.2025.113320","url":null,"abstract":"<div><div>Laser speckle rheology (LSR) is a powerful technique for probing the dynamic properties of complex fluids and biological tissues. However, multiple scattering in turbid samples remains a significant challenge, limiting its accuracy and requiring extensive calibration. In this study, a neural-network–assisted Gamma correction is introduced, in which the recorded speckle intensities are re-weighted to restore the true <em>g</em><sub>2</sub>(t) decay, eliminating the need for lengthy calibration. The neural network predicts the optimal Gamma value for speckle intensity correction across different sample concentrations. Once corrected, the speckle patterns are analyzed to compute the autocorrelation function and extract the complex modulus |<em>G*(ω)</em>|. Experimental results show that the neural network achieves a maximum absolute error of 0.006 in Gamma prediction, requires only 5 min to train, and computes each Gamma value in just 0.000273 s. These results not only ensure rapid processing but also provide highly accurate Gamma-corrected speckle patterns, leading to the precise calculation of |<em>G*</em>(<em>ω</em>)|. By removing the necessity for laborious calibration procedures, this approach ensures rapid and accurate rheological characterization of complex fluids.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113320"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0