Optics express最新文献_第8页

Quantum-trajectory-based analysis of far-field spatial profiles in high-order harmonic generation from single-layer ZnO. 基于量子轨迹的单层ZnO高次谐波远场空间分布分析。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.573658

Jiahao You, Zhiming Yin, Zhong Guan, Xiangyu Tang, Cheng Jin

{"title":"Quantum-trajectory-based analysis of far-field spatial profiles in high-order harmonic generation from single-layer ZnO.","authors":"Jiahao You, Zhiming Yin, Zhong Guan, Xiangyu Tang, Cheng Jin","doi":"10.1364/OE.573658","DOIUrl":"https://doi.org/10.1364/OE.573658","url":null,"abstract":"Recently, the divergent features in the spatial profiles of solid-state high-order harmonic generation (HHG) have attracted significant attention in both experimental and theoretical studies. However, the understanding of their origins-particularly those related to microscopic quantum trajectories-remains incomplete. In this work, we reveal the relationship between spatially resolved HHG and the microscopic response by employing a propagation model combined with quantum-trajectory resolved induced-current phase. We simulate the far-field macroscopic HHG from single-layer ZnO under a Gaussian laser beam using the Huygens-Fresnel principle and show how its divergence features vary with the target position and laser intensity. We extract the phase coefficients of various quantum trajectories from the quantum-path intensity distributions. These distributions are calculated from the microscopic current across different momentum channels. The phase coefficients are then incorporated into the propagation model. This enables us to accurately explain the variations in both on-axis and off-axis components of the far-field macroscopic HHG spatial distributions as the target position changes. Our work provides new insights into analyzing the spatial structure of solid-state HHG in both experiment and theory and offers a novel perspective for probing the microscopic properties of solid-state high harmonics.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38841-38856"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125588","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

Research on the crack detection method of black coating based on machine vision and deep learning. 基于机器视觉和深度学习的黑色涂层裂纹检测方法研究。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.568123

Yunlong Jia, Da Mu, Fang Liu, Zheng Guo, Xiao Qin

{"title":"Research on the crack detection method of black coating based on machine vision and deep learning.","authors":"Yunlong Jia, Da Mu, Fang Liu, Zheng Guo, Xiao Qin","doi":"10.1364/OE.568123","DOIUrl":"https://doi.org/10.1364/OE.568123","url":null,"abstract":"In practical applications of the black high-radiation coating on the surface of porous materials, thermal stress can lead to the formation of micro-cracks on the surface, which may compromise the overall structural integrity and safety. This study proposes a machine vision sampling system to address the challenge of low-contrast imaging of small cracks in black coatings, affecting real-time detection accuracy. The system investigates the effects of various lighting methods on crack-background contrast. Additionally, it performs data augmentation and annotation on collected images to construct a dataset for black coating crack target detection. A BCC-YOLO crack detection algorithm is introduced, which builds upon the YOLOv10s model by incorporating an ADown module to replace traditional Conv and SCDown down-sampling modules, reducing both the number of model parameters and computational complexity while enhancing the model's feature extraction capability for small cracks. Furthermore, an iEMA attention mechanism module is integrated into the small-target detection layer, which combines the iRMB module with the EMA attention mechanism. This fusion maintains effective attention while reducing the number of parameters. The UIoU loss function replaces CIoU to accelerate convergence and improve training stability. Experimental results demonstrate that, compared to YOLOv10s, BCC-YOLO achieves improvements of 9.7%, 11.2%, 10.8%, and 9.8% in precision (P), recall (R), mAP50, and mAP50:95, respectively, on the self-built black coating crack dataset. Moreover, it reduces FLOPs by 7.3%. These enhancements improve the accuracy of crack detection for low-contrast black coatings and decrease the computational complexity of the model, which holds significant implications for achieving high-precision automatic crack detection.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38237-38257"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125606","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

Extended depth of focus metalens toward the entire long-wave infrared spectrum through inverse design framework. 通过逆设计框架将聚焦深度超透镜扩展到整个长波红外光谱。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.570816

Yongcan Zeng, Xiaoling Ge, Yuqing Zhang, Siyang Xiao, Fen Zhao, Chongchong Ran, Mingjie Wu, Fengyuan Gan, Jiagui Wu, Junbo Yang

引用次数: 0

Motion blur suppression method for time-of-flight imaging systems based on differential correlation sampling data. 基于差分相关采样数据的飞行时间成像系统运动模糊抑制方法。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.566399

Ping Song, Yunjian Bai, Chuangbo Hao, Wuyang Zhang, Yinpeng Wu

{"title":"Motion blur suppression method for time-of-flight imaging systems based on differential correlation sampling data.","authors":"Ping Song, Yunjian Bai, Chuangbo Hao, Wuyang Zhang, Yinpeng Wu","doi":"10.1364/OE.566399","DOIUrl":"https://doi.org/10.1364/OE.566399","url":null,"abstract":"Time-of-Flight (ToF) imaging systems, capable of their high frame rate, high resolution, and cost-effectiveness, enable diverse applications. However, their ranging performance is significantly degraded by motion blur caused by relative motion between the system and the scene. To address this challenge, this paper proposes a motion blur suppression method based on differential correlation sampling (DCS) data for time-of-flight imaging systems, which employs a three-step strategy: firstly, adaptive thresholds for motion blur detection are established based on noise levels to identify blurred regions; secondly, the occurrence time of motion blur is determined, and compensation is performed using the complementary properties of DCS data to suppress motion blur; finally, an enhanced bilateral filtering is applied according to the spatial distribution characteristics of motion-blurred regions to further improve suppression efficacy. Experimental validation in both laboratory and real-world environments demonstrates the superiority of the proposed method. Compared with existing techniques, our approach significantly reduces the root mean squared error (RMSE) and enhances metrics such as the noise reduction ratio, peak signal-to-noise ratio (PSNR), and structural similarity index measure (SSIM). This study offers a novel framework for suppressing motion blur in ToF imaging systems and provides valuable insights into understanding motion blur in three-dimensional measurement systems.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37840-37855"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125669","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

Interference fading suppression method for φ-OTDR based on time-distance dual-domain phase differential. 基于时距双畴相位差的φ-OTDR干扰衰落抑制方法。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572197

Zixuan Zhong, Tao Liu, Guolu Yin, Tao Zhu

{"title":"Interference fading suppression method for φ-OTDR based on time-distance dual-domain phase differential.","authors":"Zixuan Zhong, Tao Liu, Guolu Yin, Tao Zhu","doi":"10.1364/OE.572197","DOIUrl":"https://doi.org/10.1364/OE.572197","url":null,"abstract":"To mitigate interference fading induced by phase randomness in multi-beam interference in phase-sensitive optical time-domain reflectometry (φ-OTDR), we present a time-distance dual-domain phase differential method (TDPD) that reconstructs constructive interference conditions for complex optical wave vectors in fading regions. The TDPD approach suppresses noise-dominated fading through distance-domain vector superposition while eliminating vibration-induced fading via time-domain differential phase processing, which reduces inter-wave phase differences to the theoretical limit imposed by pulse repetition frequency. The temporal-neighboring phase unwrapping and integration strategy are employed to recover the original phase waveform prior to differential operations. Experimental validation on a 10 km fiber demonstrated accurate phase measurements for 10 Hz, chirp, and 0.1 Hz vibrations. TDPD simultaneously addresses fading in both noise- and vibration-affected regions, achieving >40 dB SNR improvement in vibration regions compared to conventional methods. This cost-effective framework with high computational efficiency offers a reliable solution for precise phase demodulation in φ-OTDR systems.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37440-37449"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125686","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-temperature sensor based on SCSCS optics fiber structure. 基于SCSCS光纤结构的高温传感器。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.573798

Yalan Niu, Haojie Zhong, Jingjing Li, Zhan Liao, Li Yang, Hanglin Lu, Jinpeng Wei, Yuanpeng Li, Jian Tang, Junhui Hu

{"title":"High-temperature sensor based on SCSCS optics fiber structure.","authors":"Yalan Niu, Haojie Zhong, Jingjing Li, Zhan Liao, Li Yang, Hanglin Lu, Jinpeng Wei, Yuanpeng Li, Jian Tang, Junhui Hu","doi":"10.1364/OE.573798","DOIUrl":"https://doi.org/10.1364/OE.573798","url":null,"abstract":"In this paper, a high-temperature optical fiber structure sensor based on Mach-Zehnder interference has been proposed and experimentally validated. The sensor is constructed via the fusion-splicing of a segment of coreless fiber (CLF) with a piece of seven-core fiber (SCF), followed by fusion-splicing another section of coreless fiber that links two single-mode fiber (SMF) structures. This configuration provides a single-mode fiber/coreless fiber/seven-core fiber/coreless fiber/single-mode fiber (SCSCS) optical fiber structure. The high-temperature characteristics of this sensor have been examined via an experiment. The results indicate that the length of the seven-core optical fiber has a minimal impact on the sensitivity spectrum to temperature. It is also shown that the sensor demonstrates excellent repeatability and stability. The sensor can withstand temperatures up to 1000 °C, and has a sensitivity of 0.026 nm/°C. The standard deviation of stability is 0.167, while the sensor exhibits good periodicity. This proposed sensor has significant potential for applications in high-temperature environments such as aviation, aerospace, and mineral mining.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38440-38448"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125690","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 specular goniochromatic materials using near-specular and diffuse reflectance. 使用近镜面和漫反射建模镜面角色材料。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.568761

Bita Panahi, Ivar Farup, Aditya Sole

引用次数: 0

Huygens metasurface based on glide-symmetric ELC resonator for highly efficient wavefront formation in sub-terahertz bands. 基于滑动对称ELC谐振腔的亚太赫兹波段高效波前形成的惠更斯超表面。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.567673

Hibiki Kagami, Daisuke Kitayama, Adam Pander, Haruka Matsunaga, Hiroyuki Takahashi

{"title":"Huygens metasurface based on glide-symmetric ELC resonator for highly efficient wavefront formation in sub-terahertz bands.","authors":"Hibiki Kagami, Daisuke Kitayama, Adam Pander, Haruka Matsunaga, Hiroyuki Takahashi","doi":"10.1364/OE.567673","DOIUrl":"https://doi.org/10.1364/OE.567673","url":null,"abstract":"Terahertz waves exhibit highly directional behavior and are easily blocked by obstacles, so for them to be used for wireless communications, they require a technology that can construct arbitrary propagation paths. A Huygens metasurface is a promising technology for this purpose because it can achieve bending of electromagnetic waves by applying a phase distribution to the wavefront using two-layer metal cells that provide a full (2π) phase shift range by adjustment of their geometry. However, the unit cells of Huygens metasurfaces tend to be large, with a quantized phase distribution that less accurately represents the ideal continuous phase distribution for beamforming and thus degrades diffraction efficiency. Here, we propose a glide-symmetric Huygens metasurface that is based on electric LC resonators with a much smaller unit cell than a given wavelength, in which the split parts are offset by a certain distance. We describe the design methodology and experimentally demonstrate large deflection angles up to 50° by using a metasurface having a phase distribution with a quantization number of six. The proposed structure is useful for forming arbitrary propagation paths in terahertz-band communication systems.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38220-38236"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125724","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

THz metasensors based on grating-patterned GaN/SrTiO₃ heterostructures for Sudan I trace detection. 基于光栅图样GaN/SrTiO3异质结构的太赫兹超传感器用于苏丹I痕量检测。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.566419

Lanju Liang, Jintao Wu, Haiyun Yao, Zongliang Wang, Xin Yan, Zhenhua Li, Ziqun Wang, Chuanxin Huang, Weiyao Xu, Mengna Li, Lu Wang, Zhang Zhang, Zhaoqing Sun, Zhendong Wang

{"title":"THz metasensors based on grating-patterned GaN/SrTiO3 heterostructures for Sudan I trace detection.","authors":"Lanju Liang, Jintao Wu, Haiyun Yao, Zongliang Wang, Xin Yan, Zhenhua Li, Ziqun Wang, Chuanxin Huang, Weiyao Xu, Mengna Li, Lu Wang, Zhang Zhang, Zhaoqing Sun, Zhendong Wang","doi":"10.1364/OE.566419","DOIUrl":"https://doi.org/10.1364/OE.566419","url":null,"abstract":"Food safety is crucial, and excessive food additives may cause cancer. In this paper, four novel semiconductor-ultrasurface sensors are proposed to significantly improve the sensitivity and realize the trace detection of Sudan red I. The experimental results show that the GaN-based hypersurface sensor has a low limit of detection (LOD) of 12.5 fg/mL for Sudan I, with a sensitivity far exceeding that of the conventional structure. The grating-patterned gallium nitride enhances the terahertz wave interaction with the analyte through a localized electric field, and its transmission spectrum develops from a single amplitude change to an amplitude-frequency bi-dimensional change, with a maximum frequency shift up to 297.54 GHz. further, the strontium titanate/gallium nitride heterostructure results in a maximum ΔT% = 12.91%. This study realizes the highly sensitive detection of Sudan I and provides a new method for the application of terahertz technology in food safety.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37856-37867"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125735","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-symmetry gradient-doped 0.17-0.38-0.17 at% Nd:YAG laser crystal for dual-end pumping configurations. 高对称梯度掺0.17-0.38-0.17 at% Nd:YAG双端泵浦结构激光晶体。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571694

Renqin Dou, Lei Huang, Shengjie Ma, Jinyun Gao, Li Wang, Wenpeng Liu, Jianqiao Luo, Tingqing Cheng, Haihe Jiang, Qingli Zhang

{"title":"High-symmetry gradient-doped 0.17-0.38-0.17 at% Nd:YAG laser crystal for dual-end pumping configurations.","authors":"Renqin Dou, Lei Huang, Shengjie Ma, Jinyun Gao, Li Wang, Wenpeng Liu, Jianqiao Luo, Tingqing Cheng, Haihe Jiang, Qingli Zhang","doi":"10.1364/OE.571694","DOIUrl":"https://doi.org/10.1364/OE.571694","url":null,"abstract":"High-symmetry gradient-doped laser crystals were specifically engineered for dual-end-pumped configurations to enhance laser performance. Two gradient-doped laser crystals were successfully fabricated, a 0.17-0.38-0.17 at% Nd:YAG rod and a 0.18-0.32-0.18 at% Nd:GdYAG rod. The output power, beam quality, and thermal characteristics were systematically compared with a conventional 0.6 at% uniformly doped Nd:YAG crystal. At 20 W pump power, the axial temperature differential in the gradient-doped crystal measured 37°C, representing a two-thirds reduction compared to the uniformly doped 0.6 at% Nd:YAG reference. The 0.17-0.38-0.17 at% Nd:YAG rod achieved a maximum output power of 14.47 W with 51.7% slope efficiency, representing 45.1% and 62.1% improvements respectively over uniformly doped 0.6 at% Nd:YAG. At 9 W output power, the beam quality factors were measured to be Mx2 = 2.347 and My2 = 2.217 for the 0.17-0.38-0.17 at% Nd:YAG crystal. This work establishes gradient doping as an effective strategy for simultaneous improvement of thermal management, power scaling, and beam quality in diode-pumped solid-state lasers.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37718-37726"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125758","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