Optics and Laser Technology最新文献

{"title":"MOU-Mamba: Multi-Order U-shape Mamba for infrared small target detection","authors":"Wenting Liu ,&nbsp;Xinming Lu ,&nbsp;Jianxin Zhang ,&nbsp;Dan Li ,&nbsp;Xingli Zhang","doi":"10.1016/j.optlastec.2025.112851","DOIUrl":"10.1016/j.optlastec.2025.112851","url":null,"abstract":"<div><div>Infrared small target detection(IRSTD) algorithms based on CNN and Transformer have achieved remarkable results. However, approaches relying on CNNs are prone to missed or false detections due to the inherent limitations of their local receptive fields, while Transformer-based structures are insufficient in local feature extraction and are computationally expensive. Recently, different variations of the Mamba, especially the integration of the 2D-Selective-Scan (SS2D) technique, have posed strong competition to CNN– and Transformer-based methods. Therefore, this paper proposes a Multi-Order U-shape Mamba (MOU-Mamba) network to explore the potential application of SS2D in IRSTD. Specifically, we design a Multi-Order 2D-Selective-Scan (MO-SS2D) module that gradually minimizes redundant information produced by SS2D operations via multi-order interactions, effectively suppressing background interference. Moreover, we propose a Local-Guided 2D-Selective-Scan (LG-SS2D) module that enhances target discernibility by constructing complementary local and global features at each interaction level. Experimental results from three public datasets show that the proposed MOU-Mamba exceeds some state-of-the-art (SOTA) methods, maintaining an effective balance between accuracy and computational complexity.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112851"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704480","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}

{"title":"Investigation of a thulium-doped fiber laser with bidirectional output assisted by compound ring cavity filter","authors":"Yuezhi Cai ,&nbsp;Fengping Yan ,&nbsp;Ting Feng ,&nbsp;Dandan Yang ,&nbsp;Qi Qin ,&nbsp;Ting Li ,&nbsp;Chenhao Yu ,&nbsp;Xiangdong Wang ,&nbsp;Hao Guo ,&nbsp;Wenjie Ji ,&nbsp;Qiuyu Huang ,&nbsp;Siyu Peng","doi":"10.1016/j.optlastec.2025.112857","DOIUrl":"10.1016/j.optlastec.2025.112857","url":null,"abstract":"<div><div>A high-performance bidirectional-output wavelength-switchable narrow-linewidth thulium-doped fiber laser (TDFL) is proposed and has been demonstrated. Based on the uniform fiber Bragg grating for wavelength selection, combined with compound ring cavity (CRC) structure for longitudinal mode selection, single longitudinal mode (SLM) laser operation at wavelengths of ∼2048.502 and ∼1942.080 nm are achieved in clockwise (CW) and counterclockwise (CCW) directions, respectively. The multi-objective optimization algorithms, including multi-objective particle swarm optimization (MOPSO) and non-dominated sorting genetic algorithm Ⅱ (NSGA-Ⅱ), are introduced to achieve a trade-off between suppression ratio (SR) and transmittance while determining multiple CRC parameters. Switching among the three states — CW SLM output, CCW SLM output, and simultaneous bidirectional SLM output in both CW and CCW directions — is achieved based on the optical path transmission characteristics of the circulators and the intracavity loss adjustment mechanism. Spectrum stability, optical signal-to-noise ratio (OSNR), linewidth, relative intensity noise (RIN), and relaxation oscillation peak are all investigated for the three states. The CW and CCW SLM output can generate stable laser output with an OSNR larger than 74.11 dB. The fluctuations of the center wavelength and the peak power are less than 0.01 nm and 1.037 dB, respectively, over 60 min. Linewidth does not exceed 1.93 kHz and the RIN is less than −125.03 dB/Hz at frequencies greater than 2 MHz. The proposed TDFL is expected to be integrated with wavelength-division multiplexing and free-space optical communication systems in the future.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112857"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704479","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}

{"title":"Fiber-optic quantum gyroscope based on Hong-Ou-Mandel interferometry","authors":"Yiwei Zhai,&nbsp;Ziming Chen,&nbsp;Zhanpeng Pan,&nbsp;Shengchun Xue,&nbsp;Yijiang Liu,&nbsp;Yuhang Zhao","doi":"10.1016/j.optlastec.2025.112846","DOIUrl":"10.1016/j.optlastec.2025.112846","url":null,"abstract":"<div><div>Hong-Ou-Mandel (HOM) interferometry with quantum states has emerged a crucial tool for precision measurement system. Here, a novel scheme for angular velocity measurement in a fiber-optic quantum gyroscope is proposed and demonstrated, based on Sagnac effect of frequency-entangled biphotons and incorporating a HOM interferometer. The time delay resulting from the rotation-induced Sagnac effect between the signal and idler photons generates a shift of HOM dip, which is proportional to the angular velocity. Consequently, a highly sensitivity and stability angular velocity measurement is achieved by monitoring the HOM dip. The sensitivity scale is measured to be <span><math><mn>3</mn><mo>.</mo><mn>54</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>08</mn><mspace></mspace><mi>fs</mi><mo>/</mo><mfenced><mrow><mi>rad</mi><mo>/</mo><mi>s</mi></mrow></mfenced></math></span> which is equivalent to a minimally detectable angular velocity of <span><math><mfenced><mrow><mn>28.25</mn><mo>±</mo><mn>0.06</mn></mrow></mfenced><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>5</mn></mrow></msup><mspace></mspace><mi>r</mi><mi>a</mi><mi>d</mi><mo>/</mo><mi>s</mi></math></span> <span><math><mfenced><mrow><mn>58.27</mn><mo>±</mo><mn>0.12</mn><mspace></mspace><mo>°</mo><mo>/</mo><mi>h</mi></mrow></mfenced></math></span> with a time delay of <span><math><mn>1</mn><mspace></mspace><mi>a</mi><mi>s</mi></math></span>. The measurement stability of the continuous rotating system, in terms of time Allan deviation (TDEV), reaches <span><math><mn>1.93</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>3</mn></mrow></msup><mspace></mspace><mi>fs</mi></math></span> at an averaging time of 10,240 s. The corresponding angular velocity measurement stability reaches <span><math><mn>55</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>5</mn></mrow></msup><mspace></mspace><mi>r</mi><mi>a</mi><mi>d</mi><mo>/</mo><mi>s</mi></math></span>. This scheme holds potential for advancing the development of high-performance optical quantum gyroscopes.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112846"},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680112","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}

{"title":"A dual channel-cross fusion network for polarization image fusion","authors":"Qiuhan Liu,&nbsp;Qiang Wang,&nbsp;Jiansheng Guo,&nbsp;Ziling Xu,&nbsp;Jiayang Yu,&nbsp;Ruicong Xia","doi":"10.1016/j.optlastec.2025.112822","DOIUrl":"10.1016/j.optlastec.2025.112822","url":null,"abstract":"<div><div>Polarization image fusion utilizes images with different polarization directions to generate fused images containing rich texture information and intensity information. Typically, the addition or concatenation operations are usually used in fusion methods, while these approaches are ineffective in merging the features from different source images. Therefore, a dual channel-cross fusion network for polarization image fusion is proposed, termed as DCCFNet. The network has two main modules: feature extraction &amp; fusion module and generation module. Feature extraction &amp; fusion module has two main branches, which are used to extract the features of the polarization images. In each branch, a squeeze-and-excitation based (SE-based) block is used to obtain the global information distribution of the feature maps within the channel dimension. To better fuse the features from different source images, a cross-fusion branch is proposed to connect the two branches and interleave the feature maps across the channel dimension. Also, a spatial attention (SA) block is employed to capture the key regions of the images. Generation module is used to generate the fused images from features. In addition, a loss function that integrates weighted structural similarity index measure (MSWSSIM) loss, intensity loss and gradient loss is developed to preserve more structural and intensity information from the source images and enhancing the clarity of target edges. The results of the experiments on two public datasets have proved the effectiveness and advancement of our proposed method.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112822"},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687989","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}

{"title":"Time-delayed reservoir computing using mutually coupled multimode semiconductor laser for high-speed image recognition","authors":"Zelin Li ,&nbsp;Yiyuan Xie ,&nbsp;Fang Xu ,&nbsp;Yichen Ye ,&nbsp;Xiao Jiang ,&nbsp;Ye Su ,&nbsp;Lili Li ,&nbsp;Zhuang Chen ,&nbsp;Yuhan Tang","doi":"10.1016/j.optlastec.2025.112774","DOIUrl":"10.1016/j.optlastec.2025.112774","url":null,"abstract":"<div><div>Reservoir computing (RC), especially time-delayed RC, which derives from recurrent neural network-based models, has the advantages of being easy to implement at the physical level and having a low training cost. Nowadays, time-delayed RC is being used to handle more complex tasks such as image processing. However, for time-delayed RC, the more complex the tasks requires more virtual nodes, resulting in longer delay lines being employed. This leads to a reduction in the RC information processing rate. To overcome this drawback, multimode semiconductor lasers with multiple modes offer a solution. In our work, we use the mutually coupled multimode semiconductor lasers as the physical nodes to construct a time-delayed RC system. Finally, two MC-MSLs were used, each with four modes. It greatly increased the number of virtual nodes at the same information processing rate. By training the RC with input extracted representative features, we have successfully realized parallel processing of the image recognition task and achieved 99.20% and 86.10% accuracies on MNIST and Fashion-MNIST datasets. Given the expansion of multimode semiconductor lasers in longitudinal mode, MC-MSLs RC is expected to enable high-speed processing of more complex tasks.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112774"},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687990","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}

{"title":"Precision processing of Nb-Si alloy via water-jet guided laser: Realization of inhibited-oxidation and small-taper","authors":"Zihuai Su ,&nbsp;Binbin Liu ,&nbsp;Yulu Zhang ,&nbsp;Juan Song ,&nbsp;Bin Qian ,&nbsp;Wei Liu ,&nbsp;Shengzhi Sun ,&nbsp;Jianrong Qiu ,&nbsp;Ye Dai","doi":"10.1016/j.optlastec.2025.112853","DOIUrl":"10.1016/j.optlastec.2025.112853","url":null,"abstract":"<div><div>Nb-Si alloy holds great promise as a crucial high-temperature material for aero-engine hot end components. Nevertheless, its hardness and relatively low room temperature fracture toughness as well as high temperature oxidation resistance becomes an obstacle for precise processing. The water-jet guided laser (WJGL) technology was introduced to process Nb-Si alloys with high precision and minimized heat-affected zone. Notably, in contrast to nanosecond conventional laser processing, under the conditions of a 20 W laser power and a cutting speed of 5 mm/s, WJGL can slice through an alloy specimen with a width of 10 mm and a thickness of 3 mm within 20 s, all while maintaining a stationary laser focus. The continuous flowing of the water jet sweeps away the laser-induced molten residues which helps to minimize thermal impact and reduce severe oxidation, leading to a thin re-melted layer with thickness of hundreds of nanometers on the processing surface. Therefore, a remarkable minimum surface roughness of 0.8 μm has been attained by WJGL, even more impressively, for a through-hole with a diameter of 1 mm and a depth of 3 mm, the taper was constrained to 0.0016°, which is hard to obtain through conventional processing. Our study conclusively demonstrates that WJGL technology represents a viable and efficient alternative for the processing of Nb-Si alloys.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112853"},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680113","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}

{"title":"High-precision etching of micro-grooves within double-layer glass via liquid-assisted laser ablation","authors":"Feng Xie ,&nbsp;Xiao Zhang ,&nbsp;Zhiwei Zhang ,&nbsp;Jian Cheng","doi":"10.1016/j.optlastec.2025.112864","DOIUrl":"10.1016/j.optlastec.2025.112864","url":null,"abstract":"<div><div>Glass is a highly transparent and chemically stable material with considerable application potential. However, its high hardness and brittleness pose challenges in processing, particularly when creating intricate 2D and 3D microstructures. Traditional processing methods often result in lower precision and poor edge quality. Recent advancements in laser technology, particularly with femtosecond lasers, offer new solutions due to their minimal thermal impact and ability for high-quality cold processing. This paper introduced a novel liquid-assisted laser ablation method, compared the ablation effects of different pulse-width laser sources and achieved single-step etching of double-layer glass. By encapsulating copper sulfate (CuSO₄) solution as an absorbent within the double-layer glass, high-precision micro-grooves were successfully etched. The results indicated that micro-groove depth can be controlled by adjusting laser parameters, with femtosecond laser outperforming nanosecond laser in etching quality. This study also delved into the underlying principles, revealing the mechanisms of material modification during femtosecond laser ablation. Furthermore, laser-induced plasma-assisted penetration (LIPAP) technique allowed for filling the micro-grooves with copper paste, in order to create stable surface heating circuits and verify the functionality. This laser double-layer processing strategy offers an effective solution for the precise fabrication of micro-functional devices based on transparent hard and brittle materials.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112864"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680080","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}

{"title":"Microstructure and mechanical properties of additive manufactured TiC-reinforced Fe55Cr25Co10Ni10 high-entropy alloy composites","authors":"Zijian Wang ,&nbsp;Fei Xing ,&nbsp;Guojian Xu ,&nbsp;Weijun Liu ,&nbsp;Hongyou Bian","doi":"10.1016/j.optlastec.2025.112870","DOIUrl":"10.1016/j.optlastec.2025.112870","url":null,"abstract":"<div><div>The FeCrCoNi series of high-entropy alloys have received widespread attention due to their excellent properties at room and low temperatures, however, the relatively low yield strengths severely limit their wide application. Currently, the research efforts in the field of ceramic particles strengthening mainly focus on the equiatomic high-entropy alloy systems. However, there have been few studies on high-entropy alloys with non-equiatomic ratios. This paper provides a detailed investigation into the mechanism of the effect of 5 wt% TiC ceramic particles on the microstructure, mechanical properties and friction and wear properties of Fe55Cr25Co10Ni10 high-entropy alloys. The results indicated that the alloy’s phase structure of the alloy changes significantly after addition 5 wt% TiC ceramic particles. The alloy transitions from the original single FCC solid solution to a composite structure consisting of FCC solid solution and TiC particles. At the same time, the alloy’s microstructure is transformed from a single columnar crystal structure to a composite structure, which includes columnar dendrites, cellular dendrites and unmelted TiC particles. Notably, this transformation has significantly improved mechanical properties: the yield strength increased from 203 MPa to 254 MPa (improved 25.1 percent), and the tensile strength increased from 542 MPa to 635 MPa (improved 17.2 percent). Theoretical calculations and practical test analyses reveal that addition TiC ceramic particles leads to a significant increase in yield strength, which is mainly attributed to the combined contribution of the Hall-Petch strengthening effect, the dislocation strengthening mechanism and the Orowan strengthening effect. In addition, it is demonstrated that high-entropy alloy composites’ friction and wear performance at room temperature exhibits excellent characteristics compared to high-entropy alloy materials. It is expected to be widely applied in the manufacturing of components in key areas of the aerospace field.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112870"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680111","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}

{"title":"Fast generation of quantum logic gate with Rydberg superatoms","authors":"J. Wang,&nbsp;J.P. Wang,&nbsp;L. Dong,&nbsp;X.M. Xiu,&nbsp;Y.Q. Ji","doi":"10.1016/j.optlastec.2025.112812","DOIUrl":"10.1016/j.optlastec.2025.112812","url":null,"abstract":"<div><div>Quantum logic gate is a basic resource in quantum computing. Here, we propose a scheme to generate a CNOT gate and a Toffoli gate with Rydberg superatoms. In the current scheme, the collective states of superatom become the coding carrier of quantum information. Integrating quantum Zeno dynamics with transitionless quantum driving, the present scheme can be implemented rapidly by selecting the appropriate parameters of the laser pulses. Furthermore, the precise numerical simulation demonstrate that the scheme possesses a high fidelity and exhibits insensitivity to atomic spontaneous emission as well as cavity decay.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112812"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680079","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}

{"title":"Thermal deformation detection and analysis of C/C composites during laser processing","authors":"Zhaoyang Zhai ,&nbsp;Jialin Yang ,&nbsp;Yajing Qu ,&nbsp;Dongya Zhang ,&nbsp;Yanchao Zhang ,&nbsp;Zhongming Liu","doi":"10.1016/j.optlastec.2025.112867","DOIUrl":"10.1016/j.optlastec.2025.112867","url":null,"abstract":"<div><div>In this study, aiming to address the deformation issue caused by thermal stress concentration, the digital image correlation (DIC) technique was employed to analyze the effects of processing parameters on strain during nanosecond-pulsed laser processing of carbon fiber-reinforced carbon matrix (C/C) composites. Results of the study indicated that the deformations increase in all directions as time proceeds. The strain perpendicular to the scanning direction was significantly higher than the parallel to the scanning direction and the combined strain in both directions. Furthermore, the maximum deformation was concentrated at the cut edges. A higher repetition frequency was found to cause smaller longitudinal strains in the material. When the laser power was low, the material had a larger negative strain, whereas increasing the power gradually increased the strains to positive values. Additionally, lower scanning speeds resulted in larger deformations, while the effect of pulse width on deformation was nonlinear. The optimal process parameters were determined by combining the orthogonal test with strain analysis results. The effectiveness of the optimized parameters was finally confirmed through analysis of the test data.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112867"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680081","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}