Optics and Laser Technology最新文献_第6页

Local-to-Global model for the surface topography prediction of laser polishing 激光抛光表面形貌预测的局部到全局模型

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-17 DOI: 10.1016/j.optlastec.2025.112985

Weiqi Huang, Sishuo Yang, Xiaoyang Jiang, Dudu Zhou, Jianguo Zhang, Jianfeng Xu, Junfeng Xiao

{"title":"Local-to-Global model for the surface topography prediction of laser polishing","authors":"Weiqi Huang, Sishuo Yang, Xiaoyang Jiang, Dudu Zhou, Jianguo Zhang, Jianfeng Xu, Junfeng Xiao","doi":"10.1016/j.optlastec.2025.112985","DOIUrl":"10.1016/j.optlastec.2025.112985","url":null,"abstract":"<div><div>Laser polishing has emerged as a promising method for surface polishing and structural recovery due to its significant advantages, particularly in the manufacturing of optical components with stringent surface quality requirements. However, the lack of Local-to-Global Model for calculating surface topography has hindered the intelligent integration and widespread commercial adoption of laser polishing technology. In this research, a prediction model is proposed, which enables highly convenient calculation of the global topography of laser polishing based on the energy distribution of a single laser spot. The model comprehensively takes into account plastic deformation, surface tension, viscous dissipation, and thermal capillary effects and the viability is verified through pulse laser polishing experiments on single crystal silicon and corresponding finite element simulations. The root mean square error of predicted profiles was between 0.32 – 0.61 nm in single line polishing experiments, which accounted for less than 15 % of the peak-to-valley value, and the average coefficient of determination was greater than 0.8. The median prediction accuracy for surface roughness across various frequency bands reach 80 % in multi-line superimposed polishing experiments. Dimensionless analysis led to the development of a phase diagram illustrating the relationship between typical surface topography and laser fluence, identifying the fluence range within which laser polishing technology can achieve optimal surface quality. Within this optimal laser fluence, laser polishing technology can substantially reduce overall roughness by up to 71.9 %, with a reduction of up to 91.5 % in the roughness of the primary frequency band. These findings offer crucial theoretical support and practical guidance for the intelligent control and industrial application of laser polishing in high-precision optical manufacturing.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112985"},"PeriodicalIF":4.6,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838568","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 bending of wood veneers: Phenomenological and machine-learning approaches case study 木材单板的激光弯曲：现象学和机器学习方法的案例研究

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-17 DOI: 10.1016/j.optlastec.2025.112925

Jorge A. Ramos-Grez , Iván La Fé-Perdomo , Sergio Calvo-Sofia

{"title":"Laser bending of wood veneers: Phenomenological and machine-learning approaches case study","authors":"Jorge A. Ramos-Grez , Iván La Fé-Perdomo , Sergio Calvo-Sofia","doi":"10.1016/j.optlastec.2025.112925","DOIUrl":"10.1016/j.optlastec.2025.112925","url":null,"abstract":"<div><div>Wood is a versatile, noble, and renewable material that plays a pivotal role in sustainable manufacturing. This study demonstrates the feasibility of laser bending veneers from various wood species by applying infrared energy via a scanned laser beam. The bending height, defined as the vertical deflection of veneer edges from the horizontal plane, was evaluated for three wood types: beech (<em>Fagus sylvatica</em>), yesquero (<em>Cariniana ianeirensis</em>), and ulmo (<em>Eucryphia cordifolia</em>). Key parameters influencing the response variable included laser energy, moisture content, water loss, density, and wood species. Experimental results revealed that veneers measuring 15 cm in length, 3.5 cm in width, and 1.5 mm in thickness achieved bending heights ranging from 0.35 cm (beech) to 4.8 cm (yesquero). The maximum average bending height of 4.45 cm was observed in beech veneers at an equilibrium moisture content of 13% under maximum laser energy of 1061 J. Ulmo specimens, oven-dried for 72 h at 40 °C, demonstrated a significant average deflection height of up to 3.1 cm. These findings reaffirm that fiber contraction is influenced not only by free water loss but also by cell-wall-bound water loss during laser interaction, contributing to shrinkage. Additionally, volume contraction induced by molecular entropy increase due to localized temperature elevation was observed. A machine learning analysis of the experimental data identified Gaussian Process Regression as the most effective algorithm for predicting the response variable, yielding the highest correlation coefficient and lowest RMSE. Moisture content was found to account for approximately 45% of the model’s predictability, followed by laser energy (35%) and water loss (both free and bound).</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112925"},"PeriodicalIF":4.6,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838563","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

Enhanced subpixel sensitivity in 3D-DIC via Spline-Based correlation map interpolation for vibration measurements 基于样条相关图插值的振动测量增强3D-DIC的亚像素灵敏度

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-17 DOI: 10.1016/j.optlastec.2025.112958

P. Neri, A. Paoli, A.V. Razionale, S. Barone

{"title":"Enhanced subpixel sensitivity in 3D-DIC via Spline-Based correlation map interpolation for vibration measurements","authors":"P. Neri, A. Paoli, A.V. Razionale, S. Barone","doi":"10.1016/j.optlastec.2025.112958","DOIUrl":"10.1016/j.optlastec.2025.112958","url":null,"abstract":"<div><div>Digital Image Correlation (DIC) is a well-established technique that has recently gained interest in the field of vibration measurements. As vibration frequency increases, the displacement amplitude decreases, determining the need for extremely high subpixel measurement sensitivity. This work introduces a novel algorithm that exploits a spline-based approach to interpolate the integer-valued correlation map and enhance subpixel sensitivity. The approach allows for the calibration of the fitting procedure with respect to the local features of the speckle pattern, which is characterized by the reference image, improving the measurement’s signal-to-noise ratio. The proposed procedure is compared with conventional approaches, which are based on polynomial fitting of the correlation map instead. Additionally, two different strategies are discussed to compute the integer-valued correlation map, i.e. pixel domain convolution and spatial-frequency domain convolution. The algorithms’ performance is assessed in terms of temporal and spatial signal-to-noise ratio using synthetic and experimental datasets.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112958"},"PeriodicalIF":4.6,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838567","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

Real-time synthetic-aperture digital holographic microscopy 实时合成孔径数字全息显微镜

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-17 DOI: 10.1016/j.optlastec.2025.112848

Zhengyuan Tang , Bryan M. Hennelly

引用次数: 0

Mechanism of laser-arc interaction of hybrid welding based on arc column layering 基于电弧柱分层的激光-电弧复合焊接相互作用机理研究

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-16 DOI: 10.1016/j.optlastec.2025.112974

Benle Wang , Xin Li , Ming Gao

{"title":"Mechanism of laser-arc interaction of hybrid welding based on arc column layering","authors":"Benle Wang , Xin Li , Ming Gao","doi":"10.1016/j.optlastec.2025.112974","DOIUrl":"10.1016/j.optlastec.2025.112974","url":null,"abstract":"<div><div>This study investigates the influence of laser-arc interaction on arc column layering to further elucidate the principles of laser-arc interaction. By employing high-speed camera imaging and spectral diagnostics, the effects of arc current on the delay of arc layering and the morphological changes in the inner and outer layers of the arc column during laser-MIG hybrid welding of aluminum alloy were examined. The findings reveal that the MIG arc exhibits a concentric double-layer structure, with the inner layer composed of metal vapor and the outer layer consisting of Ar plasma. The laser-arc interaction delays the formation of arc layered structure and induces expansion of the outer layer and contraction of the inner layer.</div><div>With the arc current range of 120-240A, the delay time of arc layering progressively decreases from 0.25 ms to 0 ms. At 240A, the layering delay phenomenon is completely eliminated. Concurrently, the diameter of the external Ar plasma expands to 1.04 times its original size, while the diameter of the internal metal vapor contracts to 0.89 times its original size. The study analyzes the mechanism of laser-arc interaction on the delay time of arc layering through changes in plasma characteristic parameters and the cooling effect of the laser on the arc. Additionally, by analyzing electromagnetic static pressure and electromagnetic contraction force, the mechanism by which arc current affects the morphological changes in the inner and outer layers of the arc is clarified, thereby deepening the understanding of the laser-arc hybrid welding mechanism.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112974"},"PeriodicalIF":4.6,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838566","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

Experimental investigation of transmission diversity and reception aperture averaging for terrestrial near-field long-distance free-space optical turbulence residence 陆基近场远距离自由空间光学湍流场发射分集和接收孔径平均的实验研究

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-16 DOI: 10.1016/j.optlastec.2025.112979

Meng Guo , Zehui Lu , Yifan Wang , Bohan Li , Dongye Xu , Shaoxiang Duan , Yuan Yao , Hao Zhang , Wei Lin , Haifeng Liu , Bo Liu

{"title":"Experimental investigation of transmission diversity and reception aperture averaging for terrestrial near-field long-distance free-space optical turbulence residence","authors":"Meng Guo , Zehui Lu , Yifan Wang , Bohan Li , Dongye Xu , Shaoxiang Duan , Yuan Yao , Hao Zhang , Wei Lin , Haifeng Liu , Bo Liu","doi":"10.1016/j.optlastec.2025.112979","DOIUrl":"10.1016/j.optlastec.2025.112979","url":null,"abstract":"<div><div>Atmospheric turbulence is a critical factor affecting the performance of free-space optical communications, as it causes fading and sudden errors, significantly degrading the bit error rate and overall communication performance of On-Off keying systems. Many approaches have been proposed by researchers to suppress atmospheric turbulence effects, among which large aperture reception and transmitting spatial diversity are considered the simplest and effective ways. In this paper, we experimentally investigate the aperture averaging effect with a 250-mm receiver and the transmitting spatial diversity with 12 transmitters in a terrestrial near-field, long-distance environment. In both cases, the scintillation index is reduced from 0.3916 to 0.0107 in a 7-km experiment and from 0.4431 to 0.0328 in a 13-km experiment, which can theoretically yield a signal-to-noise ratio gain of about 7 dB for On-Off keying signals with a bit-error rate of 1 × 10<sup>−3</sup>. Moreover, we discuss the transmitting diversity gain loss, considering both channel correlation and averaged receiving power. Additionally, for the calculation of <span><math><msubsup><mi>C</mi><mrow><mi>n</mi></mrow><mn>2</mn></msubsup></math></span> in moderate-to-strong turbulence, we propose a method based on gamma-gamma model using experimental results.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112979"},"PeriodicalIF":4.6,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833828","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

SNR enhancement for FDM phase-sensitive OTDR using phase-frequency modulation method 利用相位调频方法增强FDM相敏OTDR信噪比

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-16 DOI: 10.1016/j.optlastec.2025.112980

Yuting Li , Hongjuan Zhang , Pengfei Wang , Yan Gao , Yu Wang , Baoquan Jin

{"title":"SNR enhancement for FDM phase-sensitive OTDR using phase-frequency modulation method","authors":"Yuting Li , Hongjuan Zhang , Pengfei Wang , Yan Gao , Yu Wang , Baoquan Jin","doi":"10.1016/j.optlastec.2025.112980","DOIUrl":"10.1016/j.optlastec.2025.112980","url":null,"abstract":"<div><div>Frequency division multiplexing (FDM) is used for high frequency response in the phase-sensitive optical time domain reflectometer (Φ-OTDR) system. However, the redistribution of probe pulse energy into bilateral bands by the Mach-Zehnder modulator results in a deterioration of the signal-to-noise (SNR) in FDM Φ-OTDR systems. A phase-frequency modulation method for compensating for the energy loss of probe pulses is proposed. The maximum compensation of the probe pulse energy is achieved when the conjugated phase-frequency modulation signal is applied as the matched filter in the pulse compression process. Experimental results demonstrate the SNR of the restored sinusoidal acoustic signals with frequencies below 11 kHz can reach approximately 46 dB over 21.6 km optical fiber using a six-channel sensing system. Compared with the restored signals of conventional FDM Φ-OTDR system, the SNR of the restored 4.3 kHz sinusoidal acoustic signal is improved by 7.81 dB, enhancing the system’s SNR effectively. This innovative approach presents a promising prospect for the practical engineering applications of fiber optic sensing technology in detecting weak signals at high frequencies.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112980"},"PeriodicalIF":4.6,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833829","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

Mechanism on failure of cooled infrared detector illuminated by CW laser 连续波激光照射冷却红外探测器失效机理研究

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-16 DOI: 10.1016/j.optlastec.2025.112967

Zi-Yi Zhang, Chen-Wu Wu

{"title":"Mechanism on failure of cooled infrared detector illuminated by CW laser","authors":"Zi-Yi Zhang, Chen-Wu Wu","doi":"10.1016/j.optlastec.2025.112967","DOIUrl":"10.1016/j.optlastec.2025.112967","url":null,"abstract":"<div><div>Cooled infrared detectors with high sensitivity and high performance are widely applied in many fields. However, environmental disturbances such as intense light may cause a decline in their performance and even lead to permanent damage. In this study, the multi-physical behaviors and the performance degradation processes of typical cooled infrared detectors under the illumination of high-power density lasers are investigated to evaluate their survivability under extreme conditions. The experimental results reveal the electrical and thermomechanical responses of the detectors under the illumination of continuous-wave lasers, and the main thermomechanical failure modes that have not been revealed before are discovered. The theoretical results obtained through a newly established three-dimensional multi-physical numerical model of the detectors under laser illumination clarify the thermomechanical mechanism of the failure of the main components of the detectors. Moreover, the dependence of the thermomechanical results on relevant parameters is discussed, providing a scientific basis for the development and optimization of related systems.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112967"},"PeriodicalIF":4.6,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838565","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

Optical wireless networks with non-orthogonal multiple access (NOMA): concept, potential issues and enhanced capacity demonstration 非正交多址（NOMA）无线光网络：概念、潜在问题和增强容量演示

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-16 DOI: 10.1016/j.optlastec.2025.112888

Yin-He Jian, Tzu-Chieh Wei, Chi-Wai Chow

{"title":"Optical wireless networks with non-orthogonal multiple access (NOMA): concept, potential issues and enhanced capacity demonstration","authors":"Yin-He Jian, Tzu-Chieh Wei, Chi-Wai Chow","doi":"10.1016/j.optlastec.2025.112888","DOIUrl":"10.1016/j.optlastec.2025.112888","url":null,"abstract":"<div><div>Optical wireless communication (OWC) has emerged as a complementary or alternative technology to the present radio-frequency (RF) communication by releasing the pressure on the highly congested RF spectrum. In this work, we introduce the concept of the power-domain non-orthogonal-multiple-access (PD-NOMA) scheme in OWC systems. We then discuss the potential issues and possible solutions. Afterwards, we propose a reconfigurable OWC system supporting not only scalable user numbers but also movable users. Achievable capacity regions under several optical power difference conditions are experimentally demonstrated and compared with those of the orthogonal-frequency-division-multiple-access (OFDMA) solutions. Up to the authors’ knowledge, this is the first comparison of evaluating PD-NOMA OWC systems in terms of achievable capacity regions rather than bit-error-rate (BER) improvements. We have shown that the low-density-parity-check (LDPC)-assisted PD-OFDM-NOMA scheme outperforms the LDPC-assisted OFDMA scheme with the capacity improvement > 11.5 %.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112888"},"PeriodicalIF":4.6,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833911","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

Plasmonic nano-disc-shaped optical fiber probe 等离子体纳米盘状光纤探针

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-04-15 DOI: 10.1016/j.optlastec.2025.112962

Wenjie Wu, Haibin Ni, Tong Cai, Taimin Rong, Jiansheng Han, Yajie Wang, Sheng Ye, Bo Ni, Yixian Ge, Linlin Lu, Jianhua Chang

{"title":"Plasmonic nano-disc-shaped optical fiber probe","authors":"Wenjie Wu, Haibin Ni, Tong Cai, Taimin Rong, Jiansheng Han, Yajie Wang, Sheng Ye, Bo Ni, Yixian Ge, Linlin Lu, Jianhua Chang","doi":"10.1016/j.optlastec.2025.112962","DOIUrl":"10.1016/j.optlastec.2025.112962","url":null,"abstract":"<div><div>Miniature plasmonic fiber probes hold vast potential in nanophotonics and label-free biosensing. However, their further use and development are hindered by complex fabrication processes. Therefore, developing low-cost and simple manufacturing methods is crucial for advancing plasmonic fiber probes. Therefore, we propose a disk-shaped multimode fiber probe based on hybrid plasmonic modes of surface plasmon polaritons (SPP) and localized surface plasmon resonance (LSPR). Using a simple nanosphere self-assembly technique to fabricate silver disk arrays (SDAs) and wet-transfer with polyvinyl alcohol (PVA) to the fiber end, large-scale production can be achieved. The SDAs achieve a refractive index sensitivity of up to 625.4 nm/RIU, while the fiber probe demonstrates a refractive index sensitivity of 329.8 nm/RIU. Additionally, it shows a significant spectral response to variations in PVA film thickness, with a humidity sensitivity of approximately 0.3 nm/%RH. This study not only emphasizes the versatility of SDAs in optical sensing applications but also offers novel and effective methods for the development of miniature plasmonic fiber probes.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112962"},"PeriodicalIF":4.6,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833834","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