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Degradation information-guided Mamba for underwater image enhancement 用于水下图像增强的退化信息引导曼巴
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-15 DOI: 10.1016/j.optlastec.2025.113542
Xiuzhu Luan , Jing Wang , Shenghui Rong , Haibo Yu , Bo He
{"title":"Degradation information-guided Mamba for underwater image enhancement","authors":"Xiuzhu Luan ,&nbsp;Jing Wang ,&nbsp;Shenghui Rong ,&nbsp;Haibo Yu ,&nbsp;Bo He","doi":"10.1016/j.optlastec.2025.113542","DOIUrl":"10.1016/j.optlastec.2025.113542","url":null,"abstract":"<div><div>Underwater imaging process is degraded by absorption and scattering, hindering the development of marine science. Underwater Image Enhancement (UIE) techniques have been developed to address this issue. Most of the current best performing UIE methods adopt solutions combining deep learning and physical models. However, mainstream deep learning networks fail to strike a good balance between globality and computational cost. In addition, existing physics-informed deep learning typically relies on a single source of physical information with degradation from a single aspect. The issue of integrating and fusing multiple physical information to UIE is not well addressed. Based on the above analysis, a degradation information-guided Mamba for underwater image enhancement is proposed, named UIEMamba. In the framework, an advanced Mamba-based backbone is designed to achieve the balance between globality and computational cost. Under the Mamba framework, the Two-Stream Swap subnet (TSS-subnet) is designed to extract and fuse information from transmission maps and color difference maps, indicating degradation levels at multiple sources. To fully utilize and fuse this degradation information, a Local to Global Multi-level Fusion subnet (LGMF-subnet) is proposed with traditional local convolution and a newly designed global Degradation Information Guided Mamba (DIG-Mamba). Our method is tested on four real-world underwater datasets, and the experimental results demonstrate that UIEMamba outperforms existing state-of-the-art methods in both quantitative metrics and visual quality.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113542"},"PeriodicalIF":4.6,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623467","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
UT-SIM: A transformer-based feature fusion network for super-resolution reconstruction in structured illumination microscopy UT-SIM:一种基于变压器的结构照明显微镜超分辨率重建特征融合网络
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-15 DOI: 10.1016/j.optlastec.2025.113551
Jianze Ye , Xuejuan Hu , Lingling Chen , Yuejie Huang , Hengliang Wang , Jian Zou , Zihao Cheng , Qianding Gao , Jingli Zhong , Shiqian Liu , Minfei Li
{"title":"UT-SIM: A transformer-based feature fusion network for super-resolution reconstruction in structured illumination microscopy","authors":"Jianze Ye ,&nbsp;Xuejuan Hu ,&nbsp;Lingling Chen ,&nbsp;Yuejie Huang ,&nbsp;Hengliang Wang ,&nbsp;Jian Zou ,&nbsp;Zihao Cheng ,&nbsp;Qianding Gao ,&nbsp;Jingli Zhong ,&nbsp;Shiqian Liu ,&nbsp;Minfei Li","doi":"10.1016/j.optlastec.2025.113551","DOIUrl":"10.1016/j.optlastec.2025.113551","url":null,"abstract":"<div><div>We propose UT-SIM, a novel deep learning framework that integrates transformer-based feature fusion into a U-Net architecture for super-resolution reconstruction in structured illumination microscopy (SIM). To further enhance reconstruction performance, UT-SIM incorporates Channel and Spatial Attention Modules (CSAM), which dynamically reweight feature maps across multiple scales. This attention mechanism enables the model to focus more effectively on critical spatial and channel-level information. Compared with conventional networks such as SRCNN, U-Net, and ML-SIM, UT-SIM achieves significant improvements in image quality, with structural similarity index (SSIM) gains of approximately 0.3–0.6 and peak signal-to-noise ratio (PSNR) improvements of 1–2 dB. Additionally, we propose a synthetic dataset generation method that enables the creation of tailored datasets for various SIM systems. Models trained with this simulated data demonstrate robust transfer learning capabilities, delivering high-quality reconstructions across diverse SIM platforms.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113551"},"PeriodicalIF":4.6,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623466","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
Modeling method for predicting part-scale geometric morphology considering manufacturing system states of laser-based directed energy deposition 考虑激光定向能沉积制造系统状态的零件几何形态预测建模方法
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-15 DOI: 10.1016/j.optlastec.2025.113531
Penghui Zhao , Haiying Wei , Kaiyuan Zheng , Yuchao Lei , Bin Li , Yi Zhang
{"title":"Modeling method for predicting part-scale geometric morphology considering manufacturing system states of laser-based directed energy deposition","authors":"Penghui Zhao ,&nbsp;Haiying Wei ,&nbsp;Kaiyuan Zheng ,&nbsp;Yuchao Lei ,&nbsp;Bin Li ,&nbsp;Yi Zhang","doi":"10.1016/j.optlastec.2025.113531","DOIUrl":"10.1016/j.optlastec.2025.113531","url":null,"abstract":"<div><div>Laser-based directed energy deposition (DED-LB) represents a promising additive manufacturing technique to produce large-scale parts and an urgent requirement of geometric accuracy with high-value products. However, achieving high forming accuracy remains a challenge, primarily due to extensive back-and-forth toolpaths and layer-by-layer thermal accumulation. During the actual manufacturing process, planned toolpaths dominate the dynamic spatiotemporal input of the laser beam and powder stream, which involves intricate heat transfer within deposition layers and results in potential geometric deviations. This study developed a virtual simulation framework that couples the manufacturing system states with a heat transfer model to predict the part-scale geometric morphology of deposited parts. An identification method was proposed to obtain kinematic timing sequence data from the dynamic manufacturing system with a prediction error of less than 1%, which considers the acceleration-deceleration phenomenon and laser switch time delays. The constructed model clearly elucidates heat dissipation mechanisms and visually illustrates the diverse deposition features caused by differences in melt pool area under different path patterns. Furthermore, the findings strongly confirm that the manufacturing system states significantly influence the geometric morphology, heat-affected depth, and heat-affected steady-state temperature. Simplified simulations that ignore the actual system states may overestimate the volume of deposited parts by a maximum of 53 % due to excessive thermal accumulation. The proposed virtual simulation method offers essential insights for practical guidance in path planning and machine tool configuration during the DED-LB process.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113531"},"PeriodicalIF":4.6,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623379","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 cleaning of contamination on the underside surface of glass insulators 激光清洗玻璃绝缘子底面污物
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-15 DOI: 10.1016/j.optlastec.2025.113532
Xianqiang Li , Jiawei Wang , Yuancheng Qin , Shunji Zhang , Hao Wu , Zilin You
{"title":"Laser cleaning of contamination on the underside surface of glass insulators","authors":"Xianqiang Li ,&nbsp;Jiawei Wang ,&nbsp;Yuancheng Qin ,&nbsp;Shunji Zhang ,&nbsp;Hao Wu ,&nbsp;Zilin You","doi":"10.1016/j.optlastec.2025.113532","DOIUrl":"10.1016/j.optlastec.2025.113532","url":null,"abstract":"<div><div>One of the important measures to prevent insulator flashover accidents is to regularly or irregularly clean the surface contaminations of insulators. Due to the irregular and unique shape of insulators, current methods struggle to effectively clean contamination on the underside surface of insulators, resulting in cleaning blind spots. Owing to the transparency of glass, laser cleaning can address this challenge, with the laser radiating from the top surface of the glass insulator to clean contamination on the underside surface. Simulation and experimental studies on laser cleaning of contamination on the underside surface of glass insulators are presented in this paper. The temperature and stress at the glass-contaminant interface were found to be positively correlated with laser power, while negatively correlated with scanning speed, spot radius, and filling spacing. The higher the contamination level, the greater the laser power required for effective cleaning. At a scanning speed of 4 m/s, the laser cleaning power thresholds for contaminants of class c, d, and e are determined to be 120 W, 130 W, and 160 W, respectively. For cleaning contaminants on the underside surface, to ensure safe cleaning, the laser scanning speed should be greater than 2 m/s. The research findings provide technical support for the engineering application of laser cleaning for contamination in blind spots on the underside surface of glass insulators.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113532"},"PeriodicalIF":4.6,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623381","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
Third-order hybrid Raman amplifier with 102-nm wideband high gain and ultralow noise figure for 18 × 112 Gbps WDM IM-DD transmission 用于18 × 112 Gbps WDM IM-DD传输的102 nm宽带高增益超低噪声的三阶混合拉曼放大器
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-15 DOI: 10.1016/j.optlastec.2025.113558
Shaoxing Wang, Jiangbing Du, Zuyuan He
{"title":"Third-order hybrid Raman amplifier with 102-nm wideband high gain and ultralow noise figure for 18 × 112 Gbps WDM IM-DD transmission","authors":"Shaoxing Wang,&nbsp;Jiangbing Du,&nbsp;Zuyuan He","doi":"10.1016/j.optlastec.2025.113558","DOIUrl":"10.1016/j.optlastec.2025.113558","url":null,"abstract":"<div><div>Broadband optical amplifiers are essential for fully utilizing the low-loss transmission window of single-mode fiber (SMF), thereby enabling ultra-wideband and high-capacity optical transmission. In this work, we experimentally demonstrate a third-order hybrid Raman amplifier (HRA) that consists of a third-order distributed Raman amplifier (DRA) cascaded with a lumped Raman amplifier (LRA). The proposed HRA is implemented over a 101.5-km SMF EX2000 and a 15.7-km dispersion-compensating fiber, achieving a 102-nm (1524–1626 nm) amplification bandwidth that covers the full C and L bands. The HRA provides a maximum on-off gain of 33.7 dB and an average on-off gain of 30.4 dB. The average effective noise figure (NF) is −5.3 dB, and the lowest effective NF is −7.6 dB, indicating that the HRA takes full advantage of the ultralow effective NF of the DRA and the high gain provided by the LRA. Using pure Raman amplification, we demonstrate intensity-modulation direct-detection (IM-DD) transmission over 18 wavelength-division multiplexing (WDM) channels at two data rates. The 56 Gbps<span><math><mrow><mo>/</mo></mrow><mi>λ</mi></math></span> PAM-4 signals meet the 7 % overhead hard-decision forward error correction (HD-FEC) threshold, while the 112 Gbps<span><math><mrow><mo>/</mo></mrow><mi>λ</mi></math></span> PAM-4 signals satisfy the 20 % overhead soft-decision forward error correction (SD-FEC) threshold.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113558"},"PeriodicalIF":4.6,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623468","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
All-fiber optic magnetic sensor based on PS-FLRD technique with superior environmental stability 基于PS-FLRD技术的全光纤磁传感器具有优异的环境稳定性
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-15 DOI: 10.1016/j.optlastec.2025.113546
Peng Xiang, Aodi Yu, Can Li, Jundong Tian, Yuan Ke, Shunyang Liu, Li Xia
{"title":"All-fiber optic magnetic sensor based on PS-FLRD technique with superior environmental stability","authors":"Peng Xiang,&nbsp;Aodi Yu,&nbsp;Can Li,&nbsp;Jundong Tian,&nbsp;Yuan Ke,&nbsp;Shunyang Liu,&nbsp;Li Xia","doi":"10.1016/j.optlastec.2025.113546","DOIUrl":"10.1016/j.optlastec.2025.113546","url":null,"abstract":"<div><div>This paper proposes and experimentally demonstrates a highly stable and sensitive all-fiber magnetic field sensor based on the phase-shifted loop ring-down (PS-FLRD) technique. The sensor leverages the Faraday effect, employing a single polarization coupler to construct a loop structure with reduced sensitivity to external environmental variations. It transforms the Faraday rotation angle changes induced by the magnetic field into optical intensity variations, eliminating the need for transducing elements such as magnetic fluids or magnetostrictive materials. Additionally, this scheme offers a larger measurement range compared to the two aforementioned approaches. A pseudo-reflective loop architecture was implemented to achieve enhanced system performance. To address the long-term effects of the electro-optic modulator, a reference photodetector PD is incorporated to provide phase compensation and correct demodulation errors. Experimental results demonstrate that the sensor achieves a sensitivity of <span><math><mn>0.03</mn><mspace></mspace><mtext>deg</mtext><mrow><mo>/</mo></mrow><msup><mtext>Gs</mtext><mn>2</mn></msup></math></span>, with a phase variation of only 0.27 deg over a temperature range between <span><math><mo>−</mo><mn>50</mn><msup><mstyle><mspace></mspace></mstyle><mrow><mo>∘</mo></mrow></msup><mrow><mtext>C</mtext></mrow></math></span> and <span><math><mn>50</mn><msup><mstyle><mspace></mspace></mstyle><mrow><mo>∘</mo></mrow></msup><mrow><mtext>C</mtext></mrow></math></span>, and exhibits excellent anti-interference performance under vibrations with an amplitude of 20 mm. The proposed sensor features a simple structure, high stability, and is suitable for magnetic field measurements in complex environments.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113546"},"PeriodicalIF":4.6,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623382","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 multiple liquid film-assisted laser shock waves cleaning of fluorinated ethylene propylene coatings on 6061-T6 aluminum alloy surface 多液膜辅助激光激波清洗6061-T6铝合金表面氟化乙丙烯涂层的研究
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-14 DOI: 10.1016/j.optlastec.2025.113539
Rongyao Li , Kun Li , Aixin Feng , Yang’en Qiu , Xiao Li , Yufeng Zhang , Hongyu Lin , Kai Song , Chedo Nankam Ronaldo , Lei Zhuge , Yan Xu
{"title":"Study on multiple liquid film-assisted laser shock waves cleaning of fluorinated ethylene propylene coatings on 6061-T6 aluminum alloy surface","authors":"Rongyao Li ,&nbsp;Kun Li ,&nbsp;Aixin Feng ,&nbsp;Yang’en Qiu ,&nbsp;Xiao Li ,&nbsp;Yufeng Zhang ,&nbsp;Hongyu Lin ,&nbsp;Kai Song ,&nbsp;Chedo Nankam Ronaldo ,&nbsp;Lei Zhuge ,&nbsp;Yan Xu","doi":"10.1016/j.optlastec.2025.113539","DOIUrl":"10.1016/j.optlastec.2025.113539","url":null,"abstract":"<div><div>For the problem of local periodic removal and recoating of fluorinated ethylene propylene (FEP) coating on surface-resin transfer moulding (Surface-RTM) mold surface, this paper proposes the liquid film-assisted laser shock wave cleaning (LFA-LSC) technology, and analyzes the effects of the number of LFA-LSC on the surface cleaning effect, macroscopic/microcosmic morphology, elemental distribution, functional groups, and wettability of 6061-T6 aluminum alloy surface. It is shown that LFA-LSC can effectively remove the FEP coating on the surface of 6061-T6 aluminum alloy through the synergistic mechanism of thermal ablation, elastic–plastic deformation of the substrate, cavitation collapse, and plasma shock wave, and regulate the surface morphology and wettability of the substrate. The oxide film on the substrate surface undergoes the evolution of pore structure formation (1–2 times), pore density reduction (3 times), and film cracking (4 times). With the increase of the number of LFA-LSC, the coating removal increased first and then decreased, and the contact angle decreased first and then increased. When the number of LFA-LSC is 3, the coating removal rate is the highest (90.33%), the hydrophilicity is optimal, and the contact angle decreases from 67.3° to 35.6°, a decrease of 47.1%, which is conducive to the improvement of the interfacial bonding strength of the coating.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113539"},"PeriodicalIF":4.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623376","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
Improved molten-pool boundary stability and residual stress for microstructure control using additive manufacturing utilizing quasi-continuous-wave laser 利用准连续波激光增材制造提高熔池边界稳定性和残余应力以控制微结构
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-14 DOI: 10.1016/j.optlastec.2025.113561
Zhou Yan , Jia Guo , Lijun Song
{"title":"Improved molten-pool boundary stability and residual stress for microstructure control using additive manufacturing utilizing quasi-continuous-wave laser","authors":"Zhou Yan ,&nbsp;Jia Guo ,&nbsp;Lijun Song","doi":"10.1016/j.optlastec.2025.113561","DOIUrl":"10.1016/j.optlastec.2025.113561","url":null,"abstract":"<div><div>The development of dendrites and solidification textures in laser additive manufacturing is highly influenced by the shape and stability of the molten-pool interface. In this study, we demonstrate that QCW-LAM effectively enhances molten-pool border stability and promotes continuous epitaxial growth of columnar dendrites. We investigate how laser modes impact the stability of the molten pool and the resulting solidification microstructure during laser additive manufacturing of 316L steel. In contrast to CW-LAM, which displays a molten-pool boundary that fluctuates, QCW-LAM is distinguished by in-situ high-frequency reheating and a consistently stable molten-pool border. These features facilitate the directional growth of columnar structures by enabling sustained epitaxial columnar dendrite development. Changing the laser mode from continuous wave (CW) to quasi-continuous wave (QCW) at the same power lowered the greatest residual tensile stress by about 40 %, from 340 MPa to 205 MPa. What’s more, because of the mean ρ<sup>GND</sup> of as-received for CW mode, as-received for QCW mode was 0.57 × 10<sup>14</sup> m<sup>−2</sup>,0.94 × 10<sup>14</sup> m<sup>−2</sup>, separately, the results indicate an even higher yield strength in the as-receive QCW mode condition. This study provides new insights into controlling dendritic growth and mechanical behavior through improved molten-pool interface stability.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113561"},"PeriodicalIF":4.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614612","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
Ultrafast holographic pulse burst laser surface modification of metals with orthogonal polarisations 正交偏振的超快全息脉冲爆发激光金属表面改性
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-14 DOI: 10.1016/j.optlastec.2025.113508
Zheng Fang , Shuai Wang , Yin Tang , Walter Perrie , Ben Agate , Yue Tang , Matthew Bilton , Joerg Schille , Udo Loeschner , Stuart Edwardson , Geoff Dearden
{"title":"Ultrafast holographic pulse burst laser surface modification of metals with orthogonal polarisations","authors":"Zheng Fang ,&nbsp;Shuai Wang ,&nbsp;Yin Tang ,&nbsp;Walter Perrie ,&nbsp;Ben Agate ,&nbsp;Yue Tang ,&nbsp;Matthew Bilton ,&nbsp;Joerg Schille ,&nbsp;Udo Loeschner ,&nbsp;Stuart Edwardson ,&nbsp;Geoff Dearden","doi":"10.1016/j.optlastec.2025.113508","DOIUrl":"10.1016/j.optlastec.2025.113508","url":null,"abstract":"<div><div>An ultrafast laser system, combined with an optical delay line and two Spatial Light Modulators has allowed comparison of kHz surface laser processing with burst processing on stainless steel, Titanium alloy and Copper using pulselengths from 180 fs −10 ps. An optical delay line allows an intraburst frequency of 323 MHz at 5 kHz hence allowing independent and simultaneous micro-structuring with orthogonal polarisations. The finesse and development of Laser Induced Periodic Surface Structures (LIPSS) is clearly affected by bursts with orthogonal polarisations as well as pulselength dependent. Three pulse burst with 10 ps pulselength eliminates LIPSS on both stainless steel and Titanium, supporting surface melting. By spatially offsetting two 1 x 5 holographic arrays with orthogonal linear polarisations, we demonstrate simultaneous parallel writing of orthogonal LIPSS at 5 kHz and 323 MHz. By scanning overlapped arrays, LIPPS texturing with 5 kHz, double and triple pulse bursts is achieved. With the high pulse energy available, simultaneous LIPSS texturing of stainless steel employing two 16 spot orthogonally polarised arrays was produced. Finally, by tightly synchronising the applications of Computer Generated Holograms to two Spatial Light Modulators, 18 x 18 real time LIPSS encoded arrays were fabricated while binary surface encoding at 10 Hz is achieved using the contrast observed during simultaneous ablation with 5 kHz compared to pulse burst.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113508"},"PeriodicalIF":4.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614506","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
“Off-On” typed square fiber-optic strontium ion sensor based on breathing effect of flexible metal-organic framework 基于柔性金属有机骨架呼吸效应的“开关”型方形光纤锶离子传感器
IF 4.6 2区 物理与天体物理
Optics and Laser Technology Pub Date : 2025-07-14 DOI: 10.1016/j.optlastec.2025.113559
Wei Ding , Jia-Zheng Sun , Wen-Qing Wei , Gui-Ju Liu , Shi-Jun Li , Ling-Xin Kong
{"title":"“Off-On” typed square fiber-optic strontium ion sensor based on breathing effect of flexible metal-organic framework","authors":"Wei Ding ,&nbsp;Jia-Zheng Sun ,&nbsp;Wen-Qing Wei ,&nbsp;Gui-Ju Liu ,&nbsp;Shi-Jun Li ,&nbsp;Ling-Xin Kong","doi":"10.1016/j.optlastec.2025.113559","DOIUrl":"10.1016/j.optlastec.2025.113559","url":null,"abstract":"<div><div>Breathing effect of flexible Metal-Organic Framework (MOF) can introduce a new sensing mechanism in optical fiber device. In this paper, we present a novel “off-on” typed square fiber optic strontium ion (Sr<sup>2+</sup>) sensor based on Au/UiO-SP nanofilm, which exhibits both photoinduced ion sensitivity enhancement behavior and temperature crosstalk compensation capability. This sensor adopts a single-mode fiber (SMF)-square fiber (SF)-SMF structure to construct multimode interference (MMI). Meanwhile, surface plasmon resonance (SPR) was excited by the deposition of Au nanofilm on the surface of SF. Among them, MMI serves as the temperature compensation unit and SPR serves as the strontium ion sensing unit. The post-modification of spiropyran (SP) on UiO-66-NH<sub>2</sub> can achieve “breathing effect”, that is, the molecular configuration of compound UiO-SP changes (from “off” state to “on” state) when exposed to ultraviolet irradiation, thus improving the adsorption efficiency of strontium ions and enhancing the detection sensitivity of the SPR sensor. The results showed that the sensitivities of the SPR sensors using UiO-66-NH<sub>2</sub>, UiO-SP-off and UiO-SP-on could reach 1.36 nm/nM, 0.99 nm/nM and 2.12 nm/nM, respectively. Experiments showed that the strontium ion detection limit of the SPR sensor based on UiO-SP-on reached 2 nM, and the temperature crosstalk was 0.366 nm/℃. The temperature sensitivity of MMI was 0.386 nm/℃, and it had almost no response to changes in Sr<sup>2+</sup> concentration. Therefore, it can be used as the temperature calibration for SPR sensors. This optical fiber device integrates the light-controlled respiration effect of flexible MOF, providing a new idea for the detection of strontium ions.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113559"},"PeriodicalIF":4.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614611","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
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