Optics and Laser Technology最新文献

{"title":"Improved wavefront reconstruction for Shack–Hartmann wavefront sensor in the presence of shock-related distortions","authors":"Ethan D. Chu,&nbsp;Timothy J. Bukowski,&nbsp;Stanislav Gordeyev","doi":"10.1016/j.optlastec.2025.112764","DOIUrl":"10.1016/j.optlastec.2025.112764","url":null,"abstract":"<div><div>Previous research has demonstrated that large density gradients, such as those produced by supersonic shockwaves, adversely affect the wavefront reconstruction of Shack–Hartmann wavefront sensors (SHWFS). Shocks cause non-diffraction-limited irradiance patterns, leading to incorrect local tilt measurements by SHWFS, and, as a consequence, degraded reconstructed wavefront accuracy. To study the effect of shocks on the reconstruction accuracy of SHWFS, experimental wavefront measurements were performed, when the interrogating laser beam was propagated along a local shock formed in transonic flow over a partial cylinder. The resulting wavefronts were simultaneously measured by a SHWFS and a digital holography wavefront sensor (DHWFS) and then compared, treating the DHWFS as the ”ground truth.” Significant error was found in the SHWFS measurements, with the error increasing nonlinearly with shock strength. Three metrics, specifically standard deviation, kurtosis, and slope discrepancy, were evaluated for their effectiveness in identifying the dots, distorted by the local shock. Excluding points that exceeded a set threshold significantly improved wavefront accuracy. A complete SHWFS wavefront was then recovered by filling in the excluded points with a spline interpolation. This algorithm decreased the root mean squared error of the SHWFS wavefront by around 30% on average. These findings contribute to the advancement of shock-wave-tolerant phase reconstruction algorithms and introduce a method for more accurate wavefront recovery in the case where a shock partially crosses the aperture.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112764"},"PeriodicalIF":4.6,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714799","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":"Generation and dynamics of dual-wavelength solitons in ultrafast fiber lasers","authors":"Ling Yun ,&nbsp;Guotao Chen ,&nbsp;Guangwei Chen ,&nbsp;Fan Ye ,&nbsp;Jie Zhou ,&nbsp;Zuxing Zhang ,&nbsp;Ruilin Zheng","doi":"10.1016/j.optlastec.2025.112873","DOIUrl":"10.1016/j.optlastec.2025.112873","url":null,"abstract":"<div><div>We present a comprehensive investigation of dual-wavelength soliton dynamics in an erbium-doped fiber laser incorporating lead selenide quantum dots (PbSe QDs) as a saturable absorber. Stable dual-wavelength operation at 1529 nm and 1557 nm is demonstrated, exhibiting distinct spectral and temporal characteristics. Reversible transitions between dual- and single-wavelength states are achieved by tuning the intracavity polarization controller. Numerical simulations, in excellent agreement with experimental results, reveal that dual-wavelength generation arises from the interplay of the erbium gain profile, birefringence-induced spectral filtering, and the nonlinear absorption of PbSe QDs. Additionally, soliton interactions exhibit elastic collisions with a 562 Hz repetition-rate difference, confirming independent propagation dynamics. These findings establish PbSe QDs as a promising nonlinear medium for multi-wavelength fiber lasers, with potential applications in dual-comb spectroscopy and wavelength-division multiplexing networks.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112873"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704577","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":"Optimal process parameter combinations search for desired deposited layer geometry in laser-arc hybrid additive manufacturing based on multi-pass overlapping deposited layer contour prediction model and improved NSGA-II algorithm","authors":"Junhua Wang ,&nbsp;Luhaotian Feng ,&nbsp;Junfei Xu ,&nbsp;Xiaoqin Zha ,&nbsp;Yunhao Cui ,&nbsp;Kun Li ,&nbsp;Tancheng Xie","doi":"10.1016/j.optlastec.2025.112700","DOIUrl":"10.1016/j.optlastec.2025.112700","url":null,"abstract":"<div><div>Laser-arc hybrid additive manufacturing (LHAM) leverages the synergistic effect of a combined laser-arc heat source to overcome the limitations of both laser additive manufacturing (LAM) and wire arc additive manufacturing (WAAM). As an advanced process, LHAM holds significant potential for development within the realm of metal additive manufacturing (MAM). How to achieve an optimal combination of process parameters based on the ideal deposited layer geometry of LHAM is a key issue that constrains the maturation of the LHAM process. In this study, an automated solution for obtaining the ideal deposited layer and searching for optimal process parameter combination for LHAM multi-pass overlapping was investigated. Orthogonal experiment was designed to obtain the original data of LHAM multi-pass overlapping deposited layer. Parabolic curve was used to fit the LHAM single-pass layer contour and a multi-pass overlapping layer contour prediction model was constructed based on the iterative approach. The accuracy of the prediction model was evaluated using three metrics. Aiming at the shortcomings of the second-generation non-dominated genetic algorithm (NSGA-II), an improved NSGA-II algorithm was proposed, and an optimisation model for the combination of process parameters was constructed by combining the entropy-weight TOPSIS method. The optimisation model was able to automatically optimise the process parameter combinations through the expected deposition layer morphology parameters. The relative error of the actual height of the multi-pass overlapping layer from the preset height selected by the optimal combination of process parameters was only 2.067%, and a smoother surface of the layer was obtained, which verified the feasibility of the optimisation model.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112700"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704478","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":"Model-based tip-tilt correction for segmented mirror of space telescope using extended beacon","authors":"Zexia Zhang ,&nbsp;Bing Dong ,&nbsp;Guoliang Tian ,&nbsp;Jinping He","doi":"10.1016/j.optlastec.2025.112852","DOIUrl":"10.1016/j.optlastec.2025.112852","url":null,"abstract":"<div><div>A model-based tip-tilt correction method using extended beacons is proposed for aligning the segmented mirror of space telescopes. This method is based on the relationship between the low spatial frequency content of images and the coefficients of Chebyshev segmented tip-tilt (CSTT) modes. Tip-tilt correction is accomplished by introducing positive CSTT modal biases with known amplitudes and capturing 2N-1 focal images in each correction cycle, where N is the number of segments. The performance of the method is evaluated through both simulations and experiments. The results demonstrate that the tip-tilt errors can be effectively corrected within only a small number of iterations, achieving an accuracy of λ/30. Additionally, the impacts of various factors on the correction performance are analyzed, including spectral bandwidth, image noise, the presence of piston errors and figure errors, and the number of mirror segments. The proposed method does not require additional optical components and offers high accuracy along with low computational complexity, making it highly suitable for cophasing of earth-observation segmented space telescopes.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112852"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704578","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":"In-situ surface inspection for wire-arc directed energy deposition integrating 3D topography reconstruction, defect detection and roughness measurement","authors":"Hao Wang ,&nbsp;Songyu Qi ,&nbsp;Tiejun Zang ,&nbsp;Chao Chen ,&nbsp;Xiaohui Zhao ,&nbsp;Yu Liu","doi":"10.1016/j.optlastec.2025.112871","DOIUrl":"10.1016/j.optlastec.2025.112871","url":null,"abstract":"<div><div>In wire-arc directed energy deposition (WA-DED), the in-situ surface inspection is imperative for acquiring 3D topographies, detecting weld bead surface defects, and measuring surface roughness to facilitate autonomous quality evaluation and repair path generation. However, existing offline inspection methods fail to provide comprehensive, real-time surface characterization. To address this limitation, a laser vision-based in-situ inspection system, where 3D topography reconstruction, defect detection and roughness measurement are innovatively integrated into a unified real-time scanning task, is developed. The inspection system consists of three subprocesses running simultaneously. By employing the novel laser centerline extraction algorithm CIICEA alongside the novel spatial curve fitting algorithm K-QCBFA, the complete 3D topographies of the printed geometries are reconstructed with a high precision of 0.247 mm. Surface hump and depression defects on the weld bead are identified and classified with a high accuracy of 97.44 % by applying the specific defect detection criterion derived from the analysis of the weld bead height difference curve. Utilizing the surface datum plane determined by the RANSAC algorithm, the geometrical indices for surface roughness, including <span><math><mrow><msub><mi>R</mi><mi>z</mi></msub></mrow></math></span>, <span><math><mrow><msub><mi>R</mi><mi>a</mi></msub></mrow></math></span>, <span><math><mrow><msub><mi>S</mi><mi>z</mi></msub></mrow></math></span> and <span><math><mrow><msub><mi>S</mi><mi>a</mi></msub></mrow></math></span>, are quantitatively evaluated with errors of ≤ 0.1558 mm. Experimental validations demonstrate that the system provides comprehensive multi-source surface information during the WA-DED process, capabilities not achievable with single-function inspection technologies, thus enabling sufficient data for effective part quality improvement.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112871"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704579","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":"Turbulence-tolerant 12-bit/symbol OAM shift keying free space optical communication using a two-stage neural network","authors":"Lin Weiqing,&nbsp;Liu Yejin,&nbsp;Lian Shengdi,&nbsp;Li Yanghong,&nbsp;Wu Zitong,&nbsp;Xiao Yu,&nbsp;Huang Haoyu,&nbsp;Liang Yaodong,&nbsp;Deng Dongmei","doi":"10.1016/j.optlastec.2025.112758","DOIUrl":"10.1016/j.optlastec.2025.112758","url":null,"abstract":"<div><div>Orbital angular momentum-shift keying free space optical (OAM-SK FSO) communication inherently suffers from disturbances in atmospheric turbulence (AT), which significantly degrades the communication performance. In this manuscript, we demonstrate a turbulence-tolerant 12 bit/symbol OAM-SK FSO communication system using a two-stage neural network, which features a modified U-Net for compensating OAM modes, and a two-step convolutional neural network for decoding. In simulation, the full capability (accuracy <span><math><mrow><mo>&gt;</mo><mn>98</mn><mo>.</mo><mn>87</mn><mtext>%</mtext></mrow></math></span>) of the proposed model in recognizing all types of OAM modes disrupted by different levels of AT is demonstrated. After transfer learning on experiment data, the model still exhibits good generalization in the practical system. The transmission of a 12,000-depth pseudo-random binary sequence encoded by 1000 12-bit symbols is displayed in a mock-up experiment, and bit error rates of <span><math><mrow><mn>2</mn><mo>.</mo><mn>50</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>4</mn></mrow></msup></mrow></math></span>, <span><math><mrow><mn>4</mn><mo>.</mo><mn>17</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>4</mn></mrow></msup></mrow></math></span>, <span><math><mrow><mn>4</mn><mo>.</mo><mn>75</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span> under weak, moderate and strong AT are observed respectively. This study provides a new, to the best of our knowledge, platform for high-capacity, robust FSO communication.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112758"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704576","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":"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}