Optics and Laser Technology最新文献

{"title":"Non-destructive UV femtosecond laser cleaning of primer on CFRP surface","authors":"Meiling Xin ,&nbsp;Shang Li ,&nbsp;Junyi Gu ,&nbsp;Wenqin Li ,&nbsp;Donghe Zhang ,&nbsp;Xuan Su ,&nbsp;Jie Xu ,&nbsp;Bin Guo","doi":"10.1016/j.optlastec.2025.113382","DOIUrl":"10.1016/j.optlastec.2025.113382","url":null,"abstract":"<div><div>The ultraviolet (UV) femtosecond laser has both high peak energy density and short pulse width characteristics, which can minimize the thermal damage to the substrate. The primer on the Carbon fiber reinforced polymer (CFRP) substrate surface was successfully removed by UV femtosecond laser for the first time. The influence of process parameters on the cleaning effect was analyzed based on the surface morphology and verified by chemical composition changes, so a reasonable process window was determined. Furthermore, the performances of the surface with different degrees of cleaning were tested. It is found that the completely cleaned surface is more hydrophilic with improved hardness. Compared to the original substrate, the hardness increased by 165.8 %, while the contact angle decreased by 6.4 %. Finally, combining experiment and analysis, the cleaning mechanisms of primer removal were summarized, i.e., the combined effects of ablation and photochemical mechanisms. The optimal laser parameters are a scanning speed of 800 mm/s, an energy density of 1.82 J/cm², and 4 cleaning times. Under these parameters, the primer is completely removed without damaging the substrate. The damage form is the mechanical fracture of carbon fibers under the excessive cleaning condition. This paper provides a reference for the removal of primer on the surface of CFRP, therefore increasing the possibility of reusing CFRP substrate.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113382"},"PeriodicalIF":4.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298304","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":"Enhanced control of the Goos–Hänchen shift at graphene-hyperbolic boron nitride multilayer hyper crystal","authors":"Kishwar Ali ,&nbsp;Francesco Ferranti ,&nbsp;Fabrizio Frezza ,&nbsp;Giulio Antonini","doi":"10.1016/j.optlastec.2025.113390","DOIUrl":"10.1016/j.optlastec.2025.113390","url":null,"abstract":"<div><div>In this study, we investigate analytically and numerically the Goos–Hänchen Shift (GHS) for reflected and transmitted plane waves in a planar uniaxial anisotropic hexagonal boron nitride (hBN) slab placed in air. An arbitrarily polarized plane wave serves as the excitation source. The Transfer Matrix Method is employed to compute Fresnel coefficients for s- and p-polarization, while the Stationary Phase Method is used to analyze the resulting GHS. For both polarizations, the reflected GHS appears at the left and right boundaries of two well-known reststrahlen bands (RBs) in the far-infrared (FIR) frequency range. Additionally, it is observed within RB1 <span><math><mo>&lt;</mo></math></span>f <span><math><mo>&lt;</mo></math></span> RB2, whereas the transmitted GHS is only present at the right and left boundaries of RB1 and RB2, respectively. Our primary objective is to extend GHS control across a broader frequency range, from FIR to the near-infrared, beyond the conventional RB-limited regime. To achieve this, we integrate a finite number of graphene sheets—modeled as a uniaxial anisotropic finite-thickness medium—with the hBN slab, forming a graphene-hBN multilayer hyper-crystal. We analyze how graphene key parameters, including chemical potential, temperature, and sheet count, influence the GHS. Additionally, the effect of hBN thickness on the reflected GHS spectra is examined across varying incident angles for both polarizations, with and without graphene integration. Our findings offer valuable insights for GHS-based optical devices operating across extended frequency ranges, as well as applications in temperature sensing and hyper-lensing.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113390"},"PeriodicalIF":4.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298306","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":"Accurate dynamic phase measurement of transparent objects by the spatiotemporal phase-shifting method with polarized sensor","authors":"Shien Ri ,&nbsp;Hou Natsu","doi":"10.1016/j.optlastec.2025.113375","DOIUrl":"10.1016/j.optlastec.2025.113375","url":null,"abstract":"<div><div>Measurement of density change and refractive index of transparent objects dynamically is critical in physics and engineering. In this study, a high-precision Mach-Zehnder interferometer system is developed to record the interferometric fringe of moving transparent objects with four polarization states in a single-shot using a state-of-the-art high-resolution polarization imaging camera. The phase and phase gradient distributions can be determined with extremely high accuracy, for the first time, by applying the spatiotemporal phase-shifting method (ST-PSM) developed by the authors. The ST-PSM is resistant to camera random noise and is not affected by changes in amplitude intensity or higher frequency disturbances. The absence of periodic error allows for the measurement of small changes in phase gradients that are not possible with conventional analysis. A dynamic analysis of the series of air density variations, including the plume, laminar and turbulent flows generated during gas injection from a nozzle was demonstrated. This method is also expected to be applied to bio-imaging, which measures the refractive index distribution of cells and the inspection of transparent materials by measuring the thickness distribution and stress concentration.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113375"},"PeriodicalIF":4.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298307","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":"Label-free optical fundus angiography based on programmable hyperspectral imaging","authors":"Yuetian Ren ,&nbsp;Yuning Song ,&nbsp;Jinchi Yao ,&nbsp;Hongguo Wei ,&nbsp;Yunxin Wang ,&nbsp;Shuaihang Luo ,&nbsp;Wenbin Xu ,&nbsp;James Joseph ,&nbsp;Keren Chen ,&nbsp;Shuo Chen","doi":"10.1016/j.optlastec.2025.113389","DOIUrl":"10.1016/j.optlastec.2025.113389","url":null,"abstract":"<div><div>Retinal vasculature, as the sole deep vascular network within the human body that can be non-invasively observed, is closely associated with various retinal and systemic disorders. However, conventional fundus imaging techniques often suffer from inadequate contrast or rely on invasive contrast agents to visualize fine retinal vessels, hemorrhages, and exudates, thereby posing great challenges in screening or diagnosing fundus diseases at their early stages. In this study, we report a label-free optical fundus angiography method based on programmable hyperspectral imaging, in which fundus images with high-contrast retinal blood vessels can be captured in a snapshot by exposing fundus tissues under specific spectrally coded illumination. Using a self-developed programmable light source, such specific spectrally coded illumination is multiplexed with specific intensities at different wavelengths under the guidance of spectral post-processing algorithms. This enables the preservation of key spectral bands that can maximize the differences between the retinal blood vessels and other fundus tissues. In such a manner, the proposed method can select the wavelengths of interest during fundus imaging in a snapshot, in contrast to numerical wavelength selection after acquiring the full wavelengths of conventional spectroscopic fundus imaging techniques; thus, the time-consuming acquisition of a three-dimensional spectral dataset and spectral post-processing can be avoided. Through evaluations on a model eye and ex vivo porcine eyes, the proposed label-free optical fundus angiography method shows significant enhancement in the image contrast of retinal blood vessels compared to conventional fundus imaging, thus is expected to benefit early and more precise diagnosis of fundus diseases.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113389"},"PeriodicalIF":4.6,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298302","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":"Experimental investigation of evolution of dynamics in short-resonant-cavity DFB laser with optical feedback","authors":"Wenchao Chen ,&nbsp;Yuanyuan Guo ,&nbsp;Zhiwei Jia ,&nbsp;Longsheng Wang ,&nbsp;Anbang Wang ,&nbsp;Yuncai Wang","doi":"10.1016/j.optlastec.2025.113397","DOIUrl":"10.1016/j.optlastec.2025.113397","url":null,"abstract":"<div><div>We conducted experiments to investigate the evolution of dynamics in short-resonant-cavity distributed feedback laser subject to optical feedback. Results reveal that the transition of the laser into chaos involves a regular switching between the stable state and quasi-periodic state. When exiting the chaotic state, the laser exhibits a switching between stable state and chaotic state, ultimately evolving into feedback locking. A new dynamic evolution path of the DFB laser has been proposed: stable state → switching between the stable state and quasi-periodic state → quasi-periodic state → chaotic state → switching between stable state and chaotic state → feedback locking. The influences of feedback strength on the duty cycle of quasi-periodic oscillation are examined. Moreover, a mapping of dynamics with respect to feedback strength and bias current is presented.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113397"},"PeriodicalIF":4.6,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298303","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":"Non-diffracted Airy beams based on multi-layer transmissive metasurface","authors":"Jianfeng Xu ,&nbsp;Yunyun Yang ,&nbsp;Zhengdiao Zheng ,&nbsp;Zhexi Yang ,&nbsp;Chenxia Li ,&nbsp;Bo Fang ,&nbsp;Ying Tang ,&nbsp;Zhi Hong ,&nbsp;Xufeng Jing","doi":"10.1016/j.optlastec.2025.113388","DOIUrl":"10.1016/j.optlastec.2025.113388","url":null,"abstract":"<div><div>As a special beam with non-diffraction, self-bending and self-repairing characteristics, the traditional generation of Airy beam mainly relies on complex optical Fourier transform systems or liquid crystal spatial light modulators, which have problems such as large system size, high cost and difficulty in integration. Metasurface has become a new carrier for generating Airy beams due to its flexible control ability of electromagnetic waves with its subwavelength scale unit structure. This paper innovatively proposes a three-layer metal resonant ring metasurface, which realizes independent control of the amplitude and phase of the Airy beam, and successfully generates three types of non-diffraction Airy beams (one-dimensional, two-dimensional and annular self-focusing type), providing a new idea for efficient and compact Airy beam generation. The three-layer open metal ring unit structure designed in this paper optimizes the unit geometric parameters (such as ring radius, opening width and rotation angle), and uses the finite difference time domain (FDTD) method to simulate and verify the decoupling control ability of the unit at 8 GHz. On this basis, by arraying the amplitude and phase distribution of the encoded Airy function, the simulation results show that one-dimensional Airy beam, annular self-focusing Airy beam, and two-dimensional Airy beam exhibit excellent non-diffraction characteristics and have self-repair capabilities, while verifying the feasibility of multi-dimensional regulation. In terms of experiments, a two-dimensional Airy beam metasurface sample was made based on printed circuit board (PCB) technology, and its performance was verified in a microwave test system. The experimentally measured lateral light intensity distribution at different propagation distances is consistent with the simulation, confirming the feasibility of the design. In addition, the metasurface can still generate high-quality Airy beams in the 7.8–8.2 GHz frequency band, showing good broadband adaptability. The designed three-layer resonant ring metasurface overcomes the limitations of traditional Airy beam generation methods and contributes to the precise application of Airy beams in the microwave field.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113388"},"PeriodicalIF":4.6,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298301","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":"Underwater optical image quality assessment via chrominance-texture fusion","authors":"Jingchun Zhou ,&nbsp;Jiaqiang Xia ,&nbsp;Weishi Zhang ,&nbsp;Dehuan Zhang ,&nbsp;Zifan Lin ,&nbsp;Qiuping Jiang","doi":"10.1016/j.optlastec.2025.113318","DOIUrl":"10.1016/j.optlastec.2025.113318","url":null,"abstract":"<div><div>Underwater optical image degradation caused by light absorption, scattering, and color distortion makes accurate assessment of underwater optical image quality a challenging task. Most existing underwater image quality assessment (UIQA) methods focus on limited visual features, overlooking critical characteristics such as texture and saliency, leading to suboptimal performance in complex scenarios. This is particularly evident in cases with severe red color cast, where existing methods struggle to effectively evaluate image quality. To address these issues, we propose a novel and efficient UIQA method that improves prediction accuracy and robustness through multi-feature fusion. Our method extracts critical features from the luminance space, chrominance space, and saliency maps to capture the multidimensional image degradation information. We designed a texture feature extraction method based on the YCbCr color space and gray-level co-occurrence matrix (GLCM), effectively separating and measuring the color and texture of images, providing an accurate description of degradation characteristics. To address the common red tint problem in underwater image enhancement, we introduce a red cast feature extraction strategy that refines chrominance modeling and incorporates saliency map features, effectively reducing color distortion and improving the model’s predictive performance. Experiments conducted on two standard underwater image quality datasets, SAUD and UID, demonstrate that our method outperforms existing state-of-the-art UIQA models across multiple evaluation metrics, particularly in complex underwater scenes, exhibiting superior prediction accuracy, stability, and generalization capability.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113318"},"PeriodicalIF":4.6,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144288744","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":"Highly stable and sensitive optical fiber temperature sensor based on vernier structure in a common-path interferometer using polarization-maintaining fiber","authors":"Shun Wang ,&nbsp;Liang Gao ,&nbsp;Ruiyao Jiang ,&nbsp;Kunhua Wen ,&nbsp;Jun Yang ,&nbsp;Yuwen Qin","doi":"10.1016/j.optlastec.2025.113384","DOIUrl":"10.1016/j.optlastec.2025.113384","url":null,"abstract":"<div><div>Achieving high sensitivity and robust environmental stability simultaneously remains a significant challenge in sensor research. Optical Vernier structure, serving as an excellent tool for substantially boosting sensing sensitivity, has become a current research hotspot. However, while it greatly improves sensitivity, the deterioration of environmental stability is inevitable. In this article, we propose and experimentally validate a temperature sensor based on the common-path interferometer Vernier structure (CPI-VS) using polarization-maintaining fiber (PMF). This sensor not only demonstrates high sensitivity (45.18 nm/℃) and robust environmental stability (with a 90.8 % improvement), but also achieves a detection limit of 0.011 ℃, surpassing both the single MZI (0.022 ℃) and the conventional DPI-VS (0.030 ℃). This sensing structure utilizes a single PMF based Mach-Zehnder interferometer (MZI) and integrates a Faraday rotation mirror (FRM) to enable two orthogonal polarized light components to propagate sequentially. Due to the Vernier effect, the sensor’s sensitivity is enhanced about 3660 times compared to a single MZI by adjusting the ratio of the arm length to the arm length difference. Experimental results are consistent with theoretical simulations. Furthermore, the sensor design improves environmental stability by 90.8 %, addressing the traditional trade-off between sensitivity and stability in fiber-optic interferometers. This work offers a novel approach to the design and application of high-sensitivity, environmentally stable fiber-optic sensors.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113384"},"PeriodicalIF":4.6,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279139","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":"Monolithically integrated dual-comb generator based on gain switched semiconductor ring lasers","authors":"Pablo López-Querol ,&nbsp;Clara Quevedo-Galán ,&nbsp;Pau Castera ,&nbsp;José Manuel G. Tijero ,&nbsp;Ignacio Esquivias ,&nbsp;Antonio Pérez-Serrano","doi":"10.1016/j.optlastec.2025.113317","DOIUrl":"10.1016/j.optlastec.2025.113317","url":null,"abstract":"<div><div>We present a monolithically integrated dual-comb generator system based on indium phosphide. The system comprises two gain-switched semiconductor ring lasers, which function as slave lasers under optical injection. Optical frequency comb generation is achieved at various repetition rates ranging from 2 GHz to 500 MHz. Additionally, we demonstrate dual-comb generation with compression factors ranging from 20 to 50,000. These results highlight the versatility of the proposed system for tunable dual-comb generation and underscore its potential for applications in high-resolution spectroscopy, optical metrology, and ranging.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113317"},"PeriodicalIF":4.6,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144288876","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":"Probe-based fiber sensor with PDMS/Mxene coating technology for antibiotic detection","authors":"Liyong Dai ,&nbsp;WenSheng Huang ,&nbsp;Chunbo Su ,&nbsp;Vladimir R. Tuz ,&nbsp;Tao Geng","doi":"10.1016/j.optlastec.2025.113379","DOIUrl":"10.1016/j.optlastec.2025.113379","url":null,"abstract":"<div><div>The widespread use of antibiotics has led to antibiotic residues in water bodies, which is a serious threat to human health and ecosystems. In this study, we propose a fiber sensor based on a Polydimethylsiloxane (PDMS)/Mxene composite coating to detect antibiotic concentration in water by photothermal effect. The Mxene material provides abundant adsorption sites due to its large specific surface area, while the PDMS is an excellent temperature conversion substrate with high thermo-optic coefficient, which achieves a high sensitivity of detection. Under the irradiation of 365 nm laser light, antibiotic molecules absorb photon energy and convert it into thermal energy, triggering a change in the refractive index of the PDMS material, which alters the transmission characteristics of the bent optical fiber. The sensor demonstrated excellent performance in susceptibility testing of antibiotics, with fast response over a time range of minutes and good repeatability and stability. The photothermal sensor greatly simplifies the sample handling process and provides strong technical support for public health and environmental protection.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113379"},"PeriodicalIF":4.6,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279138","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}