Optics and Laser Technology最新文献

Orthogonal design of bioinspired butterfly-wing microstructures for enhanced anti-reflection performance 增强抗反射性能的仿生蝴蝶翼微结构正交设计

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-14 DOI: 10.1016/j.optlastec.2025.113840

Bing Zhong , Xinbo Zhou , Quan Gu , Jie Ding , Chao Zhang , Hefa Zhu , Zhong Wang

引用次数: 0

Wear behaviors of laser-directed energy deposited Inconel 625 alloys-based composite coating by different oscillating laser paths 不同振荡激光路径下激光定向能沉积Inconel 625合金基复合涂层的磨损行为

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-13 DOI: 10.1016/j.optlastec.2025.113900

Kaiming Wang , Zeng Yi , Zibo Song , Yongle Hu , Xiaotong Pang , Jian Zhang , Xixi Ji , Jingzhong Fang , Pengfei Wu , Mingjun Zhang , Peng Zhang , Yonggang Tong , Jian Gu

{"title":"Wear behaviors of laser-directed energy deposited Inconel 625 alloys-based composite coating by different oscillating laser paths","authors":"Kaiming Wang , Zeng Yi , Zibo Song , Yongle Hu , Xiaotong Pang , Jian Zhang , Xixi Ji , Jingzhong Fang , Pengfei Wu , Mingjun Zhang , Peng Zhang , Yonggang Tong , Jian Gu","doi":"10.1016/j.optlastec.2025.113900","DOIUrl":"10.1016/j.optlastec.2025.113900","url":null,"abstract":"<div><div>This study investigated the microstructure evolution and wear mechanism of Inconel 625 alloy manufactured by oscillating laser-directed energy deposition (LDED) under various oscillation paths. The results reveal that laser oscillation effectively suppresses epitaxial growth tendencies while promoting the columnar-to-equiaxed transition (CET) of dendrites. The infinite oscillating laser path induces reduced dilution rate and aspect ratio, generating uniformly refined equiaxed grains that simultaneously enhance microhardness and improve wear resistance across both room-temperature and high-temperature conditions. The wear mechanisms indicated that room-temperature conditions predominantly exhibited abrasive and adhesive wear, complemented by minor oxidative wear. In contrast, the high-temperature wear behavior undergoes a transformation into oxidation dominated and adhesive wear mechanisms.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113900"},"PeriodicalIF":5.0,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044024","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

Imaging detection and feature reconstruction of cylindrical surface components internal defects based on laser ultrasonic techniques 基于激光超声技术的圆柱表面构件内部缺陷成像检测与特征重建

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-13 DOI: 10.1016/j.optlastec.2025.113927

Yu Peng , Xiaokai Wang , Shutong Dai , Kangwen Huang , Chaoshan Ren , Yan Zeng , Zhixiong Han , Linlin Gui

{"title":"Imaging detection and feature reconstruction of cylindrical surface components internal defects based on laser ultrasonic techniques","authors":"Yu Peng , Xiaokai Wang , Shutong Dai , Kangwen Huang , Chaoshan Ren , Yan Zeng , Zhixiong Han , Linlin Gui","doi":"10.1016/j.optlastec.2025.113927","DOIUrl":"10.1016/j.optlastec.2025.113927","url":null,"abstract":"<div><div>Internal pores, cracks at different angles, and other internal defects have varying degrees of influence on the fatigue performance and service safety of curved surface components such as machine tool bearings and train wheels. Therefore, the imaging detection and feature reconstruction of internal defects in curved surface components are of vital importance for identifying the types and morphologies of defects. Laser ultrasonic testing enables full-coverage internal defect inspection, particularly effective for curved-surface components. When combined with advanced imaging algorithms, this technique achieves accurate spatial quantification and volumetric reconstruction of subsurface flaws. This study introduces a polar coordinate-based synthetic aperture focusing technique (SAFT) to improve imaging efficiency and quality. Simulation models were developed to replicate the B-Scan process of laser ultrasonic interactions with defects in curved components, generating B-Scan characteristic images for various defect types. The polar coordinate-based SAFT considering directionality in polar coordinates was used to reconstruct the defects in the simulation model. A laser ultrasonic rotational scanning system was employed to conduct B-Scan experiments on samples containing pre-fabricated defects (e.g., pore, porosity, horizontal crack, 45° crack, and vertical crack). The proposed algorithm was then applied to reconstruct these defects. The reconstructed hole defects exhibited minimal positional errors, with a maximum deviation of 0.564 mm. Crack defects showed variations in angular and length errors, with maximum angular and length deviations of 3.129° and 2.198 mm, respectively. The results demonstrate that laser ultrasonics enables precise localization and quantitative assessment of internal defects within curved structural components.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113927"},"PeriodicalIF":5.0,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044025","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

Underwater wireless optical oam-multiplexed data transmission in dynamic scattering environments 动态散射环境下水下无线光复用数据传输

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-12 DOI: 10.1016/j.optlastec.2025.113896

Panpan Yu , Xiaolong Chen , Zhihong Yuan , Min-Cheng Zhong , Xuan Nie , Lei Gong

{"title":"Underwater wireless optical oam-multiplexed data transmission in dynamic scattering environments","authors":"Panpan Yu , Xiaolong Chen , Zhihong Yuan , Min-Cheng Zhong , Xuan Nie , Lei Gong","doi":"10.1016/j.optlastec.2025.113896","DOIUrl":"10.1016/j.optlastec.2025.113896","url":null,"abstract":"<div><div>Underwater wireless optical communication (UWOC) has emerged as a promising technique for underwater communication. Recently, the potential of orbital angular momentum (OAM) multiplexing in enhancing bandwidth for high-capacity data transmission has been demonstrated. However, multiple optical scattering events in turbid water can disrupt the OAM beams’ wavefront, leading to an increased bit error rate (BER) in OAM-multiplexed UWOC systems. Here, we present a compact scattering demultiplexer (CSD) with anti-perturbation capability. This enables high-accuracy OAM-multiplexed data transmission through dynamic scattering liquid environments. The CSD employs the speckle-correlation scattering matrix method to retrieve the structured light field from the detected speckle intensity. Subsequently, the information for each OAM channel is demultiplexed using a mode decomposition method. To validate our proposed technique, we construct a UWOC system based on a Digital Micromirror Device (DMD), and simulate dynamic underwater scattering environments using an intralipid suspension. We demonstrate high-accuracy data transmission via 24 multiplexed OAM channels in these dynamic scattering underwater environments. Additionally, we examine the impact of varying liquid lengths and scattering levels of intralipid-induced turbulence on OAM-multiplexed data transmission. This approach is expected to pave the way for robust, high-accuracy underwater communications.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113896"},"PeriodicalIF":5.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044093","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

LMFE-Net: A lightweight multi-scale pedestrian feature enhancement network for complex scenarios LMFE-Net：用于复杂场景的轻量级多尺度行人特征增强网络

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113860

Tingting Yuan , Huicheng Lai , Jingwen Tang , Xi Zhang , Di Jiang

{"title":"LMFE-Net: A lightweight multi-scale pedestrian feature enhancement network for complex scenarios","authors":"Tingting Yuan , Huicheng Lai , Jingwen Tang , Xi Zhang , Di Jiang","doi":"10.1016/j.optlastec.2025.113860","DOIUrl":"10.1016/j.optlastec.2025.113860","url":null,"abstract":"<div><div>To address false detections, missed detections, high model complexity, and high computational costs that current pedestrian detection algorithms face in complex scenes, this research proposes a Lightweight Multi-scale Feature Enhancement Network (LMFE-Net) that improves upon YOLO11. First, in the backbone network, a multi-scale progressive feature aggregation structure is constructed to enhance the network’s ability to learn and capture multi-scale pedestrian features. Second, a novel adaptive boundary feature enhancement network is designed, combining lightweight hybrid convolution enhancement module and boundary feature complementary enhancement module to strengthen feature fusion and improve pedestrian feature expression capability, significantly increasing detection accuracy. Additionally, a lightweight quality-enhancement shared detection head is designed to solve the problems of parameter redundancy and insufficient position quality assessment in the original detection network. To further improve detection accuracy, Inner-IoU and MPDIoU are combined as bounding box regression loss functions to improve model robustness in complex occlusion scenarios. Finally, channel pruning further reduces the improved model’s size and complexity without sacrificing accuracy. Experimental results show that the proposed algorithm increases <span><math><mi>m</mi><mi>A</mi><msub><mi>P</mi><mrow><mn>50</mn></mrow></msub></math></span> by 8.3 percentage points on the CityPersons dataset, while reducing model parameters to 0.5 M and GFLOPs to 6.0; generalization experiments on TinyPerson and CrowdHuman datasets show that the algorithm improves <span><math><mi>m</mi><mi>A</mi><msub><mi>P</mi><mrow><mn>50</mn></mrow></msub></math></span> by 7.9 % and 3.0 % respectively for small-sized targets and occlusion scenarios. Overall, LMFE-Net significantly improves detection accuracy while greatly reducing model complexity.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113860"},"PeriodicalIF":5.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043999","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

Experimental investigation and optimization of process parameters in laser-assisted micro-milling Inconel718 激光辅助微铣削Inconel718工艺参数的实验研究与优化

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113862

Xiaohong Lu , Ying Chen , Chen Cong , Kai Xv , Steven Y. Liang

{"title":"Experimental investigation and optimization of process parameters in laser-assisted micro-milling Inconel718","authors":"Xiaohong Lu , Ying Chen , Chen Cong , Kai Xv , Steven Y. Liang","doi":"10.1016/j.optlastec.2025.113862","DOIUrl":"10.1016/j.optlastec.2025.113862","url":null,"abstract":"<div><div>In order to investigate the suitability of laser-assisted micro-milling (LAMM), a potential way for improving the quality of micro parts made from nickel-based superalloy Inconel718, and to identify appropriate process parameters, an experimental platform for LAMM is constructed. First, the orthogonal experiments are conducted with 4 factors of spindle speed, feed per tooth, axial cutting depth, and laser power. According to the experimental results, the influence of different process parameters on three-directional cutting force, workpiece surface roughness, the reduction rate of tool diameter, and material removal rate are ascertained by range analyses and analysis of variance (ANOVA), respectively. The analyzed results indicate that the spindle speed is the commanding factor for three-directional cutting force, surface roughness, and the reduction rate of tool diameter, while the axial depth of cut is the commanding factor for material removal rate. Subsequently, based on the orthogonal experiment results, two distinct multiple non-linear regression prediction models are established to predict the reduction rate of tool diameter and surface roughness. The reliability and significance of the two models are evaluated. Finally, multi-objective optimization of process parameters is achieved through the genetic algorithm after satisfying the constraints of process parameters, minimizes the surface roughness and reduction rate of tool diameter, and maximizes the material removal rate. The Pareto optimal solution is obtained, providing a reference for the process parameter combinations to achieve high quality, high efficiency, and low consumption for the engineering application of LAMM Inconel718.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113862"},"PeriodicalIF":5.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043953","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

Innovative rotating hollow needle design for accurate measurement of high-power laser microspots 创新的旋转空心针设计，用于精确测量高功率激光微斑

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113846

Yong Bai , Zhe Wang , Wang Cheng , Yunfeng Ma , Lifen Liao , Zhixi Zhang , Fang Bai , Guangyan Guo , Changjun Ke , Yongjian Zhu

{"title":"Innovative rotating hollow needle design for accurate measurement of high-power laser microspots","authors":"Yong Bai , Zhe Wang , Wang Cheng , Yunfeng Ma , Lifen Liao , Zhixi Zhang , Fang Bai , Guangyan Guo , Changjun Ke , Yongjian Zhu","doi":"10.1016/j.optlastec.2025.113846","DOIUrl":"10.1016/j.optlastec.2025.113846","url":null,"abstract":"<div><div>The rotating hollow needle constituted the core component of the high-power laser microspot monitor. This paper innovatively proposed a rotating hollow needle, which utilized oxygen-free copper as the base material and ceramic as the scatterer material, with its laser-receiving surface plated with a reflective film. The measurement principle and equivalent scattering cross section model were elucidated. Experimental studies investigating the detected power under varying laser powers, frequencies and duty ratios revealed that at high frequencies, the relationship between detected power and frequency was approximately linear. In contrast, at low frequencies, the response relationship was weak or absent. The measured equivalent scattering efficiency range was (2–20) × 10<sup>−9</sup>, demonstrating it exceptionally suitable for measuring the microspots with high-power density. Furthermore, the effect of plated film on detected power was analyzed, revealing that needles plated with gold film (lower reflectivity) yielded slightly higher detected power compared to those plated with silver (higher reflectivity). The deviation of the predicted and actual laser power value was within 10 %. These fundamental findings indicated that the novel rotating hollow needle to measure high-power microspots had significant advantages for developing the high-power laser microspot monitor.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113846"},"PeriodicalIF":5.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044017","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

Enhancing the near-infrared absorption of silicon by controlling the optical bandgap via laser-based co-doping 通过激光共掺杂控制光学带隙来增强硅的近红外吸收

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113899

X. Deng , Z.B. Cao , H.W. Yang , C. Wen , Y. Ren , M. Chen , Y. We , X.Y. Li

{"title":"Enhancing the near-infrared absorption of silicon by controlling the optical bandgap via laser-based co-doping","authors":"X. Deng , Z.B. Cao , H.W. Yang , C. Wen , Y. Ren , M. Chen , Y. We , X.Y. Li","doi":"10.1016/j.optlastec.2025.113899","DOIUrl":"10.1016/j.optlastec.2025.113899","url":null,"abstract":"<div><div>Co-doping can narrow the bandgap of semiconductor materials. This can be achieved by controlling the ratio of the co-dopant amounts. Here, hyperdoped Si was co-doped using a nanosecond laser. A Ti–Al multilayer was deposited on the surface of intrinsic Si using vacuum electron-beam evaporation. An ultraviolet nanosecond laser was utilized to melt the impurities into the intrinsic Si. Then, the optical bandgap of Ti–Al-co-doped Si (Si:(Ti–Al)) was controlled by changing the atomic ratio of the Ti and Al impurities (<em>N</em><sub>Ti</sub>/<em>N</em><sub>Al</sub>) from 7.66 to 51.71. The results show that the infrared absorbance of Si:(Ti–Al) at <em>λ</em> = 1100–2500 nm is significantly enhanced due to the narrower bandgap, being on average 2.50 times that of intrinsic Si. The absorbance of Si:(Ti–Al) is maximum at <em>N</em><sub>Ti</sub>/<em>N</em><sub>Al</sub> ∈ (24.41, 51.71). The optical bandgap of Si is reduced from 1.120 to 1.055 eV since the tail of the degenerate energy band extends into the forbidden band, resulting in a narrower bandgap. Furthermore, different Si:(Ti–Al) samples have a very similar surface microstructure; thus, the effect of the surface structure can be excluded, and this work focuses on the influence of co-doping on the photoresponse. In addition, the Ti–Al chemical state is found in Si:(Ti–Al), which indicates that Ti and Al atoms bond to form Ti–Al pairs, which electrically activate the impurities. This reveals a possible approach to activate impurities, which is distinct from that of single-impurity-hyperdoped Si.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113899"},"PeriodicalIF":5.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044023","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

GM-APD lidar reconstruction algorithm with few frames based on sample function 基于样本函数的GM-APD少帧激光雷达重建算法

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113866

Zhou Shi , Jianfeng Sun , Dajian Cui , Xin Zhou , Hongchao Ni

{"title":"GM-APD lidar reconstruction algorithm with few frames based on sample function","authors":"Zhou Shi , Jianfeng Sun , Dajian Cui , Xin Zhou , Hongchao Ni","doi":"10.1016/j.optlastec.2025.113866","DOIUrl":"10.1016/j.optlastec.2025.113866","url":null,"abstract":"<div><div>Under the conditions of few frames and low signal-to-background ratio (SBR), when the Geiger-mode avalanche photodiode (GM-APD) lidar reconstructs the range image, the statistical form of its echo data shows sparsity and discreteness. The probability distribution histogram of photon triggering is prone to losing the target peak, making it difficult to estimate the position of the target peak accurately, which affects the detection of small and weak targets. To address this problem, the concept of peak prominence of the echo signal was defined, and an algorithm based on the sample function was proposed. This algorithm first recovers the lost target peak, filters the target peak to remove small spikes, and calculates the peak prominence of the local peaks. The local peak with the largest peak prominence is the target peak, thus accurately estimating its position of the target peak. The experimental results on the self-built GM-APD laser radar detection imaging platform show that in a real scene with SBR = 0.0263, the three evaluation indicators of the proposed algorithm are superior to SPIRAL. The target restoration degree (K) is 43 % higher than SPIRAL, the peak signal-to-noise ratio (PSNR) is improved by 9.5 dB, and the mean absolute error (MAE) is reduced by 95bins. This confirms the importance of this algorithm in the field of few-frame and low signal-to-noise ratio GM-APD detection imaging and has broad application prospects.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113866"},"PeriodicalIF":5.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044016","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

Helical cage-like butterfly beams for manipulation of transparent and absorbing particles 用于操纵透明和吸收粒子的螺旋笼状蝴蝶光束

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113811

Zhenhang Xu , Yongzheng Yang , Hailong Wu , Yujie Wu , Zijing Zhang , Anqi Liang , Zongyuan Wu , Aoshuai Huang , Hangxiao Zhou , Dongmei Deng

引用次数: 0