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A study on angular distribution of THz radiation driven by two-colour laser-induced microplasma 双色激光诱导微等离子体驱动太赫兹辐射角分布的研究
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-02-15 DOI: 10.1080/09500340.2023.2223311
Abolfazl Yousef-Zamanian, M. Neshat
{"title":"A study on angular distribution of THz radiation driven by two-colour laser-induced microplasma","authors":"Abolfazl Yousef-Zamanian, M. Neshat","doi":"10.1080/09500340.2023.2223311","DOIUrl":"https://doi.org/10.1080/09500340.2023.2223311","url":null,"abstract":"We present an analytical method to study the angular distribution of THz radiation driven by two-colour laser-induced microplasma in nitrogen gas. Directionally dependent temporal waveforms of the radiated THz pulse is calculated. To do so, we have extended the photo-current model to calculate three-dimensional distribution of the photo-induced current from which the far-field THz radiation is computed. We have also studied the effect of optical polarization state and phase difference on the angular distribution of radiation. Our study shows that for two orthogonally-polarized colours, not only THz polarization state, but also the angular distribution of THz radiation is mostly influenced by the second optical harmonic. The possibility of rotating the angular radiation pattern around the axis of the laser propagation is illustrated for circularly-polarized laser drivers by changing the optical phase difference.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43297835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Infrared image stripe noise removal using wavelet analysis and parameter estimation 红外图像条纹噪声的小波分析与参数估计
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2219775
Ende Wang, Zhiyuan Liu, Bing-zhen Wang, Zhiyu Cao, Shiwei Zhang
{"title":"Infrared image stripe noise removal using wavelet analysis and parameter estimation","authors":"Ende Wang, Zhiyuan Liu, Bing-zhen Wang, Zhiyu Cao, Shiwei Zhang","doi":"10.1080/09500340.2023.2219775","DOIUrl":"https://doi.org/10.1080/09500340.2023.2219775","url":null,"abstract":"Infrared image systems often generate stripe noise because of the non-uniformity of the focal plane array, which significantly reduces the visual quality of the image. To solve this problem, we proposed an effective single-frame denoising method in this paper. First, the wavelet function extracts the approximate and vertical components of the original image containing stripe noise. Then, the approximation component is denoised by parameter estimation, and the vertical component is denoised by guided filtering. Finally, wavelet reconstruction is performed to realize the denoising process of the original image. This method avoids the loss of details of other components of the image and achieves an excellent denoising effect. The experimental results on the public datasets indicate that our proposed method can effectively eliminate the stripe noise of infrared images compared with some advanced methods.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45102747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Insensitivity of partially coherent Gaussian -Schell model beams to the impact of dynamic Kolmogorov type turbulence 部分相干高斯-谢尔模型光束对动态Kolmogorov型湍流影响的不敏感性
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2219770
Lekshmi S.R., D. Naik, C. S. Narayanamurthy
{"title":"Insensitivity of partially coherent Gaussian -Schell model beams to the impact of dynamic Kolmogorov type turbulence","authors":"Lekshmi S.R., D. Naik, C. S. Narayanamurthy","doi":"10.1080/09500340.2023.2219770","DOIUrl":"https://doi.org/10.1080/09500340.2023.2219770","url":null,"abstract":"ABSTRACT The effect of dynamic Kolmogorov kind of turbulence on Gaussian- Schell model beams in different coherence regimes have been explored in detail. The propagation characteristics of such turbulence impacted beams are quantitatively verified at the laboratory level by calculating beam wandering, scintillation index, and Zernike polynomials. It has been experimentally verified that Gaussian Schell model beams are more resilient to the impact of turbulence compared to their fully coherent counterparts under different turbulence strengths. These results find applications in free-space optical communications.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48247800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
Transfer of squeezing in a cavity magnomechanics system 空腔磁力系统中的挤压传递
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2219778
Abdelkader Hidki, Abderrahim Lakhfif, J. El Qars, M. Nassik
{"title":"Transfer of squeezing in a cavity magnomechanics system","authors":"Abdelkader Hidki, Abderrahim Lakhfif, J. El Qars, M. Nassik","doi":"10.1080/09500340.2023.2219778","DOIUrl":"https://doi.org/10.1080/09500340.2023.2219778","url":null,"abstract":"In this paper, we consider a cavity magnomechanical system composed of a microwave (MW) cavity, magnon, and phonon modes, where the magnon is coupled, respectively, to the MW cavity and phonon through both the magnetic-dipole and magnomechanical interactions. We demonstrate that the flux-driven Josephson parametric amplifier with a nonlinear gain is crucial in creating the squeezed states of the magnon and phonon modes. We show that, by the cavity-magnon state-swap interaction, the magnons can be completed in a squeezed state, and that the phonons can also be squeezed by driving the magnons through a strong red-detuned MW field. Essentially, our system reveals a squeezing transfer from cavity photons to magnons and then to phonons. The influence of physical and environmental parameters on the degree of squeezing is widely explored.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42350562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2
Dual-band tunable filter based on high-Q guided-mode resonance grating 基于高Q导模谐振光栅的双频可调谐滤波器
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2217305
Q. Gu, Fangjie Wang, Yulei Huang, Hao Zhou, G. Deng, Shouhuan Zhou
{"title":"Dual-band tunable filter based on high-Q guided-mode resonance grating","authors":"Q. Gu, Fangjie Wang, Yulei Huang, Hao Zhou, G. Deng, Shouhuan Zhou","doi":"10.1080/09500340.2023.2217305","DOIUrl":"https://doi.org/10.1080/09500340.2023.2217305","url":null,"abstract":"A dual-band tunable filter with a 10.5 nm narrowband based on guided-mode resonance grating is demonstrated. The two filtering working bands around 1200 and 1550 nm can be switched by controlling the TE and TM polarization, respectively. And the Q factor as high as 146.7 at 1550 nm is experimentally realized by optimizing the grating parameters. At TE polarization, an asymmetrical line shape is obtained. In addition, the angle-dependent guided-mode resonance (GMR) effect is well studied in the designed GMR grating filter, in which the tunability and optical bistability based on the thermo-optic effect are first demonstrated.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42224768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Determining the size of the overlapping area for image stitching in dark-field detection 在暗场检测中确定用于图像拼接的重叠区域的大小
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2219777
Dan Chen, Yuqin Wang, Rongzhu Zhang
{"title":"Determining the size of the overlapping area for image stitching in dark-field detection","authors":"Dan Chen, Yuqin Wang, Rongzhu Zhang","doi":"10.1080/09500340.2023.2219777","DOIUrl":"https://doi.org/10.1080/09500340.2023.2219777","url":null,"abstract":"Dark-field microscopic imaging system has high spatial resolution, but small image field. When an optical surface with a large-diameter is tested, the image stitching is necessary to obtain the full-aperture detection results. In this paper, Harris corner detection algorithm is used to achieve the full aperture testing result by stitching multiple detection images. According to the Shannon sampling theorem, how the size of the overlapping area influences the stitching results is analysed in detail. Combined with the spatial scale of surface defects, a method for determining the size of the overlapping area is given. The standard scratch patterns are used to simulate the stitching process. On this basis, an actual stitching processing is carried out on the detection images of surface scratches of four different spatial scales. Both the simulation and experimental results show that it is reasonable to use the scale of the smallest defect to determine the number of sampling points in the stitching area.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49346969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Mitigation of lateral misalignment in the optical set-up for the generation of perfect vortex beam by the radial shearing self-interferometric (RSSI) technique 利用径向剪切自干涉（RSSI）技术缓解产生完美涡旋光束的光学装置中的横向错位
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2192812
Swati Gangwar, R. Dwivedi, V. Jaiswal, R. Mehrotra, Shibu Saha, P. Sharma
{"title":"Mitigation of lateral misalignment in the optical set-up for the generation of perfect vortex beam by the radial shearing self-interferometric (RSSI) technique","authors":"Swati Gangwar, R. Dwivedi, V. Jaiswal, R. Mehrotra, Shibu Saha, P. Sharma","doi":"10.1080/09500340.2023.2192812","DOIUrl":"https://doi.org/10.1080/09500340.2023.2192812","url":null,"abstract":"Traditionally, interference patterns play an important role in determining the sign and magnitude of the orbital angular momentum (OAM) of the vortex beam. However, we demonstrate the importance of interference patterns in the identification and mitigation of lateral misalignment in the optical set-up, studied through the Radial Shearing Self-Interferometric (RSSI) technique. A splitting of the interference pattern of the perfect vortex beam (PVB) was observed with the introduction of lateral misalignment. These interference patterns proved to be instrumental in the identification of minute misalignment (micron level) in the optical set-up. The splitting in the interference patterns has been detected through image processing and an algorithm for automating the mitigation process has been proposed. The technique could prove to be a step towards self-aligning optical set-ups.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45215786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
Synthetic wavelength scanning interferometry for 3D surface profilometry with extended range of height measurement using multi-colour LED light sources 合成波长扫描干涉法三维表面轮廓测量与扩展范围的高度测量使用多色LED光源
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2194454
Priyanka Mann, Vishesh K. Dubey, Azeem Ahmad, Ankit Butola, D. Mehta
{"title":"Synthetic wavelength scanning interferometry for 3D surface profilometry with extended range of height measurement using multi-colour LED light sources","authors":"Priyanka Mann, Vishesh K. Dubey, Azeem Ahmad, Ankit Butola, D. Mehta","doi":"10.1080/09500340.2023.2194454","DOIUrl":"https://doi.org/10.1080/09500340.2023.2194454","url":null,"abstract":"We report three-dimensional surface profilometry with extended range of height measurements using synthetic wavelength scanning interferometry without tunable filters, wavelength-tuning lasers, grating elements. We have used inexpensive multiple colour light emitting diodes (LEDs) and operate them sequentially one by one or combination of two or more colours simultaneously to visualize synthetic wavelength light source. Multiple colour LED light source was synthesized and entire visible range from violet to deep red colour was covered. A wide range of synthetic wavelengths were obtained. Five step phase shifting algorithm was used to recover phase maps with Mirau type interferometer which can be further utilized for 3D height measurements. A simple phase subtraction method was used to reconstruct the phase map at synthetic wavelength. The present system provides extended range of height measurements from sub-wavelength to tens of wavelengths. Experimental results of 3D-surface profile measurements of Si-IC chip and standard step object are presented.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44102069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Phase noise suppression based on iterative adaptive bilateral filter in digital holographic microscopy for topography measurement 基于迭代自适应双边滤波器的数字全息显微镜地形测量相位噪声抑制
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2183065
Hongqiang Yu, Shuhai Jia, Zihan Lin, Liming Gao, Xing Zhou
{"title":"Phase noise suppression based on iterative adaptive bilateral filter in digital holographic microscopy for topography measurement","authors":"Hongqiang Yu, Shuhai Jia, Zihan Lin, Liming Gao, Xing Zhou","doi":"10.1080/09500340.2023.2183065","DOIUrl":"https://doi.org/10.1080/09500340.2023.2183065","url":null,"abstract":"Topography measurement is a pivotal application in quantitative phase imaging using digital holographic microscopy. In this paper, a reflection-type digital holographic microscope is set up to reconstruct the phase image of the sample with step characteristics, and a noise suppression approach based on an iterative adaptive bilateral filter is proposed to reduce phase coherent noise. The proposed denoising approach considers the phase difference in the neighbourhood to better identify and preserve step characteristics. Experimental results demonstrated the effectiveness of the proposed method.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60050829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
OCT image denoising algorithm based on discrete wavelet transform and spatial domain feature fusion 基于离散小波变换和空间域特征融合的OCT图像去噪算法
IF 1.3 4区 物理与天体物理
Journal of Modern Optics Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2197520
Wenyu Wei, Huaiguang Chen, Jing Gao, S. Fu, Jin Li
{"title":"OCT image denoising algorithm based on discrete wavelet transform and spatial domain feature fusion","authors":"Wenyu Wei, Huaiguang Chen, Jing Gao, S. Fu, Jin Li","doi":"10.1080/09500340.2023.2197520","DOIUrl":"https://doi.org/10.1080/09500340.2023.2197520","url":null,"abstract":"Optical coherence tomography (OCT) is an emerging optical imaging modality with high resolution and non-invasive, which plays an important role in applications such as material detection and disease diagnosis, especially for ophthalmic retinal diseases such as age-related macular degeneration, diabetic macular edema and choroidal neovascularization. However, since OCT utilizes the coherent interference of light, the generated image is inevitably affected by speckle noise, which blurs the structural information of the image such as layer structure and lesion point, and the low-quality OCT image makes its subsequent application become difficult. To solve this problem, an OCT image denoising fusion based on discrete wavelet transform and spatial domain feature weighting is proposed in this paper. Extensibility experiments show that the proposed algorithm can better remove noise and retain its precise structural information compared with several state-of-the-art OCT image denoising algorithms.","PeriodicalId":16426,"journal":{"name":"Journal of Modern Optics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44372484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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