Optics and Laser Technology最新文献_第10页

An all-optical approach for the precise quantification of residual stress in the shot-peened structures based on laser-induced Rayleigh waves 基于激光诱导瑞利波的全光学方法，用于精确量化喷丸强化结构中的残余应力

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-10 DOI: 10.1016/j.optlastec.2024.111756

{"title":"An all-optical approach for the precise quantification of residual stress in the shot-peened structures based on laser-induced Rayleigh waves","authors":"","doi":"10.1016/j.optlastec.2024.111756","DOIUrl":"10.1016/j.optlastec.2024.111756","url":null,"abstract":"<div><p>An all-optical method for precisely measuring of residual stress in the submillimeter depth of shot-peened structures is proposed, based on laser-induced Rayleigh waves. First, a finite element analysis is conducted to elucidate the correlation between Rayleigh wave velocity and surface roughness. The velocity of Rayleigh waves in a stress-relieved, shot-peened specimen is then established as a baseline, effectively eliminating the influence of microstructural alterations such as grain refinement and work hardening on the Rayleigh wave velocity. By numerically simulating velocity variations across different stress levels, the acoustoelastic constant of Rayleigh waves in TB6 titanium alloy is accurately determined. Additionally, the optimized frequency of Rayleigh waves is identified, enabling the precise measurement of average residual stress within the shot-peening depth. In this study, the complex interaction between surface roughness and microstructural changes on Rayleigh wave velocity is rigorously controlled through meticulous experimental design, ensuring accurate residual stress measurements using an all-optical approach. The average residual stress, quantified using laser-induced Rayleigh waves under varying shot-peening intensities, aligns closely with results from X-ray diffraction and blind hole drilling methods, demonstrating the high efficacy and reliability of the proposed methodology.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163496","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

Study of femtosecond laser induced periodic structure on amorphous silicon films and crystallization characteristics 非晶硅薄膜上的飞秒激光诱导周期结构及结晶特性研究

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-10 DOI: 10.1016/j.optlastec.2024.111764

{"title":"Study of femtosecond laser induced periodic structure on amorphous silicon films and crystallization characteristics","authors":"","doi":"10.1016/j.optlastec.2024.111764","DOIUrl":"10.1016/j.optlastec.2024.111764","url":null,"abstract":"<div><p>The large area and uniform laser-induced periodic surface structure has a wide range of industrial application potential. The effect of the laser beam scanning velocity and laser fluence on the large-area fabrication of Laser-Induced Periodic Surface Structures (LIPSS), on 50 nm thickness a-Si thin films, is investigated. The results show that the formation and crystallization changes of LIPSS structure are obviously related to the scanning speed and laser fluence. In addition to surface morphology, the crystallinity of polycrystalline silicon can also be controlled by laser parameters. Based on these results, we applied direct laser induced periodic surface structuring to drive the phase transition from amorphous silicon into polycrystalline silicon. And prepare the periodic fringe structure of polycrystalline silicon with good crystallization and regular structure. By changing the polarization direction of the incident laser, the periodic surface structure with specific orientation can be obtained, and the surface of the material can be endowed with significant optical properties. When the prepared polycrystalline silicon periodic structure samples with different orientations are put into dark field microscope, the different color effects of the samples can be observed.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0030399224012222/pdfft?md5=c5507dfba473673f085fded45d921291&pid=1-s2.0-S0030399224012222-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The challenges and focuses on plastic welding by picosecond laser in the field of camera module assembly 用皮秒激光进行塑料焊接在照相机模块组装领域的挑战和重点

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-10 DOI: 10.1016/j.optlastec.2024.111751

{"title":"The challenges and focuses on plastic welding by picosecond laser in the field of camera module assembly","authors":"","doi":"10.1016/j.optlastec.2024.111751","DOIUrl":"10.1016/j.optlastec.2024.111751","url":null,"abstract":"<div><p>Polycarbonate (PC) and cyclic olefin copolymers (COC) are extensively employed in optical lenses due to their exceptional optical properties. However, mechanical clamping forces connecting lenses to each other and barrel within the camera module assembly (CMA) can lead to image quality degradation. Laser welding of plastics has emerged as an innovative technique for addressing this issue. Picosecond laser welding has successfully achieved joints between PC to PC, PC to COC, and COC to COC under optical contact (OC) and non-optical contact (NOC) conditions. Comprehensive analyses of weld zone morphology and mechanical properties have revealed diffusion bonding as the mechanism for joint formation and brittle fracture as the mechanism for fracture. By contrasting the requirements of camera module assembly with these plastic joints, the joint bonding strength is deemed adequate. However, numerous challenges and limitations hinder the advancement of laser plastic welding within the CMA field. Pertinent suggestions have been provided to address these obstacles, including the optimization of welding parameters, utilization of a high-NA focal system, and surface polishing of materials. The implementation of improved laser welding techniques is expected to significantly contribute to the future development of CMA.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163435","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

High-efficiency self-frequency-shifted solitons generation in an erbium-doped fiber laser system 在掺铒光纤激光器系统中产生高效率自频移孤子

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-10 DOI: 10.1016/j.optlastec.2024.111769

引用次数: 0

A comparative study on MHz and GHz bursts addressing the polarization-based control of laser-induced modifications in fused silica 针对基于偏振的熔融石英激光诱导改性控制的 MHz 和 GHz 脉冲串比较研究

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-10 DOI: 10.1016/j.optlastec.2024.111289

引用次数: 0

Room temperature high-power TEM00 mode beam from bulk solid-state laser without water cooling 无水冷散装固体激光器发出的室温高功率 TEM00 模式光束

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-10 DOI: 10.1016/j.optlastec.2024.111630

引用次数: 0

High quality nanogratings far beyond diffraction limits on silicon efficiently fabricated using femtosecond laser dual-beam interference direct writing 利用飞秒激光双光束干涉直接写入技术在硅片上高效制造出远超衍射极限的高质量纳米研磨层

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-09 DOI: 10.1016/j.optlastec.2024.111505

引用次数: 0

Parameter optimization for in-situ synthesized TiB2/TiC particle composite coatings by laser cladding based on OOA-RFR and U-NSGA-III 基于 OOA-RFR 和 U-NSGA-III 的激光熔覆原位合成 TiB2/TiC 粒子复合涂层的参数优化

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-09 DOI: 10.1016/j.optlastec.2024.111755

{"title":"Parameter optimization for in-situ synthesized TiB2/TiC particle composite coatings by laser cladding based on OOA-RFR and U-NSGA-III","authors":"","doi":"10.1016/j.optlastec.2024.111755","DOIUrl":"10.1016/j.optlastec.2024.111755","url":null,"abstract":"<div><p>During laser cladding, the in-situ synthesis of ceramic particles in the coatings can further enhance the performance of the coatings. However, current research lacks a method to predict and optimize the in-situ synthesized composite coatings. Therefore, in this paper, laser power, scanning speed, powder feeding speed, overlap rate, and the content of Ti and B<sub>4</sub>C mixed powder were used as experimental factors to optimize the powder utilization, surface flatness, and microhardness of the coatings. The random forest optimized by the osprey optimization algorithm was used as the predictive model and the unified non-dominated sorting genetic algorithm III was used for optimization. The microhardness of the optimized coatings was enhanced due to the in-situ synthesized TiB<sub>2</sub>/TiC particles, and the particles were dispersed within the composite coating. The powder utilization of the composite coating under the optimum process parameters was 72.18%, the surface flatness was 81.96% and the microhardness was 712.3 HV<sub>1.0</sub>. The relative errors were all lower than 3%, and the hardness was 5.76% higher than that of the substrate. Therefore, this method can provide a reference for the optimization of process parameters for in-situ synthesized composite coatings.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163595","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

Study on impact damage characteristic parameters and threshold model for composite material laminates 复合材料层压板的冲击损伤特征参数和阈值模型研究

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-09 DOI: 10.1016/j.optlastec.2024.111744

{"title":"Study on impact damage characteristic parameters and threshold model for composite material laminates","authors":"","doi":"10.1016/j.optlastec.2024.111744","DOIUrl":"10.1016/j.optlastec.2024.111744","url":null,"abstract":"<div><p>Laser shock interface bonding force detection technology has significant advantages in assessing the bonding strength of adhesively bonded composite structures. However, current research methods rely on dynamic monitoring of the shock process combined with post-impact microscopic imaging for damage status determination. This approach presents challenges such as a cumbersome process, difficulty in standardizing damage scales, inconsistency between laboratory and field data types and their physical meanings, and limited generalizability of test results. This paper establishes a “mass-spring-damper” response theory model for laser-shocked composite plate structures and introduces a new damage characterization parameter, R. This parameter reflects the residual vibrational energy post-impact and can serve as a threshold indicator for damage determination. By establishing a relationship between laser parameters and the R value, the model facilitates rapid identification of damage stages and quantifies internal damage status with the established threshold model. The model accuracy is validated using laser shock data from two sets of T300 composite laminates. This method addresses the challenges of direct quantification and unified assessment across parameters, providing a reliable basis for parameter selection in engineering applications.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0030399224012027/pdfft?md5=48414cca93c713f3d4375c37f470c042&pid=1-s2.0-S0030399224012027-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Directly writing multicomponent plasmonic nanocavities based on fs-laser induced photo-mechanical spallation 基于 fs 激光诱导的光机械剥落直接写入多组分质子纳米腔

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2024-09-09 DOI: 10.1016/j.optlastec.2024.111752

{"title":"Directly writing multicomponent plasmonic nanocavities based on fs-laser induced photo-mechanical spallation","authors":"","doi":"10.1016/j.optlastec.2024.111752","DOIUrl":"10.1016/j.optlastec.2024.111752","url":null,"abstract":"<div><p>Multicomponent plasmonic nanostructures exhibit enhanced resonant coupling and unique energy dissipation mechanisms, demonstrating out-standing application potential. However, the controllable fabrication of multicomponent plasmonic nanostructures in terms of composition, shape, and size, remains highly challenging. In this paper, we propose a method for controllable fabrication of multicomponent plasmonic nanocavity arrays through femtosecond laser directly writing. Based on the optically induced mechanical spallation effect, in-situ controllable direct writing of Au-Ag nanocavities was achieved and the size could be tuned within the range of 700 nm to 20 μm in diameter and 300 nm to 1.3 μm in height. The Au-Ag nanocavity structure showing a limit detection concentration of 10<sup>-14</sup> M of rhodamine (R6G) and an enhancement factor of 1.27 × 10<sup>8</sup>. Furthermore, the structure exhibited excellent physical and chemical stability, with a maxi-mum relative standard deviation of 3.02 % after exposure to air two months. In addition, other kinds of metal (Ag-Al) were also fabricated successfully, revealing highly universality of the fabrication method and making the method highly promising for widely applications.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163302","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