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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 Q4 OPTICS Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2219778
Abdelkader Hidki, Abderrahim Lakhfif, J. El Qars, M. Nassik
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.
在本文中,我们考虑了一个由微波(MW)腔、磁振子和声子模式组成的腔磁力学系统,其中磁振子通过磁偶极子和磁力学相互作用分别与微波(MW)腔和声子耦合。我们证明了具有非线性增益的磁驱动约瑟夫森参数放大器对于产生磁振子和声子模式的压缩态至关重要。我们证明,通过腔-磁振子状态交换相互作用,磁振子可以在压缩状态下完成,并且通过驱动磁振子通过强红失谐MW场也可以压缩声子。从本质上讲,我们的系统揭示了从腔光子到磁振子再到声子的挤压转移。物理和环境参数对挤压程度的影响得到了广泛的探讨。
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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 Q4 OPTICS Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2217305
Q. Gu, Fangjie Wang, Yulei Huang, Hao Zhou, G. Deng, Shouhuan Zhou
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.
提出了一种基于导模共振光栅的窄带10.5 nm双波段可调谐滤波器。通过控制TE偏振和TM偏振,可以分别切换1200 nm和1550 nm左右的两个滤波工作波段。通过优化光栅参数,在1550 nm处实现了高达146.7的Q因子。在TE极化下,得到了不对称的线形。此外,在所设计的GMR光栅滤波器中,研究了角度相关的导模共振效应,首次证明了基于热光效应的可调性和光双稳性。
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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 Q4 OPTICS Pub Date : 2023-02-06 DOI: 10.1080/09500340.2023.2219777
Dan Chen, Yuqin Wang, Rongzhu Zhang
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.
暗场显微成像系统具有较高的空间分辨率,但成像场较小。当测试具有大直径的光学表面时,图像拼接是获得全孔径检测结果所必需的。本文采用Harris角点检测算法,通过拼接多幅检测图像来实现全孔径检测结果。根据香农采样定理,详细分析了重叠区域的大小对拼接结果的影响。结合表面缺陷的空间尺度,给出了一种确定重叠区域大小的方法。标准划痕图案用于模拟缝合过程。在此基础上,对四种不同空间尺度的表面划痕检测图像进行实际拼接处理。仿真和实验结果都表明,使用最小缺陷的尺度来确定缝合区域中的采样点数量是合理的。
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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 Q4 OPTICS Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2192812
Swati Gangwar, R. Dwivedi, V. Jaiswal, R. Mehrotra, Shibu Saha, P. Sharma
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.
传统上,干涉模式在确定涡旋光束轨道角动量的符号和大小方面起着重要作用。然而,我们通过径向剪切自干涉(RSSI)技术研究了在光学装置中识别和减轻横向不对准的干涉模式的重要性。在引入横向不对准的情况下,观察到完美涡旋光束(PVB)干涉图样的分裂。在光学装置中,这些干涉模式被证明是识别微小偏差(微米级)的工具。通过图像处理检测了干涉模式的分裂,并提出了一种自动抑制过程的算法。这项技术可能被证明是向自对准光学装置迈出的一步。
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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 Q4 OPTICS Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2194454
Priyanka Mann, Vishesh K. Dubey, Azeem Ahmad, Ankit Butola, D. Mehta
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.
我们报告三维表面轮廓测量与扩展范围的高度测量使用合成波长扫描干涉测量无可调滤波器,波长调谐激光器,光栅元件。我们已经使用廉价的多色发光二极管(led),并按顺序一个接一个或两种或多种颜色的组合同时操作,以可视化合成波长光源。合成了多色LED光源,覆盖了从紫色到深红色的整个可见范围。合成波长的范围很广。采用五步移相算法恢复Mirau型干涉仪的相位图,可进一步用于三维高度测量。采用一种简单的相位减法重建合成波长的相位图。目前的系统提供了扩展的高度测量范围,从亚波长到几十个波长。给出了硅集成电路芯片和标准台阶物体三维表面轮廓测量的实验结果。
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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 Q4 OPTICS Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2197520
Wenyu Wei, Huaiguang Chen, Jing Gao, S. Fu, Jin Li
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.
光学相干断层扫描(OCT)是一种新兴的高分辨率、无创的光学成像方式,在材料检测和疾病诊断等应用中发挥着重要作用,尤其是在老年性黄斑变性、糖尿病性黄斑水肿和脉络膜新生血管等眼用视网膜疾病中。然而,由于OCT利用了光的相干干涉,生成的图像不可避免地受到斑点噪声的影响,斑点噪声模糊了图像的结构信息,如层结构和病变点,并且低质量的OCT图像使其后续应用变得困难。针对这一问题,本文提出了一种基于离散小波变换和空间域特征加权的OCT图像去噪融合方法。可扩展性实验表明,与几种最先进的OCT图像去噪算法相比,该算法能够更好地去除噪声并保留其精确的结构信息。
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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 Q4 OPTICS Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2183065
Hongqiang Yu, Shuhai Jia, Zihan Lin, Liming Gao, Xing Zhou
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.
地形测量是数字全息显微定量相位成像的关键应用。本文建立了反射式数字全息显微镜,重建了具有阶跃特征的样品的相位图像,并提出了一种基于迭代自适应双边滤波器的噪声抑制方法来降低相位相干噪声。提出的去噪方法考虑了邻域的相位差,可以更好地识别和保持阶跃特征。实验结果证明了该方法的有效性。
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引用次数: 0
An EEMD-based method for removing residual blood oxygen signal noise by combining wavelet and singular spectrum analysis 结合小波和奇异谱分析,提出了一种基于eemd的残血氧信号噪声去除方法
IF 1.3 4区 物理与天体物理 Q4 OPTICS Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2183067
Zhiming Xing, Yan Cao, Xinzhi Shan, Lingyu Wang, Xiumin Gao
Blood oxygen content plays an important role in clinical diagnosis and treatment. However, interference signals will be introduced in the process of the signal acquisition, which will affect the accuracy of measurement results. Although the filter can eliminate most of the interference, there will still be a part of the residual interference signal. In order to eliminate these residual interference, this paper proposes a signal denoising method based on ensemble empirical mode decomposition (EEMD), lifting wavelet transform (LWT) and singular spectrum analysis (SSA). Firstly, the measured signal is decomposed by EEMD to obtain multiple modal components (IMF). The high-frequency components are denoised by LWT, and then reconstructed with the low-frequency components. Finally, the SSA is carried out on the reconstructed signal, the appropriate components are selected to reconstruct the signal to obtain the final denoised signal. After testing the EEMD-LWT-SSA method with simulated and measured signals, it can be seen that the method can effectively suppress the residual noise in signals and improve the accuracy of data.
血氧含量在临床诊断和治疗中起着重要作用。但是在信号采集过程中会引入干扰信号,影响测量结果的准确性。虽然滤波器可以消除大部分干扰,但仍然会有一部分残留的干扰信号。为了消除这些残余干扰,本文提出了一种基于集成经验模态分解(EEMD)、提升小波变换(LWT)和奇异谱分析(SSA)的信号去噪方法。首先,对测量信号进行EEMD分解,得到多模态分量(IMF);高频分量先用LWT去噪,然后用低频分量重构。最后对重构后的信号进行SSA,选择合适的分量进行重构,得到最终去噪后的信号。通过仿真信号和实测信号对EEMD-LWT-SSA方法进行测试,可以看出该方法能够有效地抑制信号中的残余噪声,提高数据的精度。
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引用次数: 1
A dual-projector three-dimensional measurement model for shading problem of micro-scale object complex surface 微尺度物体复杂表面阴影问题的双投影三维测量模型
IF 1.3 4区 物理与天体物理 Q4 OPTICS Pub Date : 2023-01-19 DOI: 10.1080/09500340.2023.2206928
Cheng Gui, Huikai Zhong, Yanjun Fu, Kejun Zhong, Baiheng Ma, Zhanjun Yan
Considering the inherent defects of the traditional triangulation method, always a shadow area is produced in the image collected by the camera. In this work, based on the traditional monocular vision measurement system, an auxiliary light source was added to alleviate the shadow problem. Two symmetrical digital light processing (DLP) projectors were also employed to project the modulated monochrome red fringe patterns and the monochrome blue fringe patterns onto the object, whereas the distorted fringe patterns were captured by the colour camera. The image collected by the colour camera was separated, whereas the deformation fringe information of the measured object was obtained in the red channel and blue channel, respectively. Fusion of red and blue channels information to eliminate measurement shadows. From the experimental results, the root mean square error (RMSE) of the system was about 6µm, and this method can effectively solve the shadow problem in small object measurement.
由于传统三角剖分方法存在固有缺陷,相机采集到的图像中总会产生阴影区域。在传统的单目视觉测量系统的基础上,增加了辅助光源来缓解阴影问题。利用两个对称的数字光处理(DLP)投影仪将调制后的单色红色条纹和单色蓝色条纹投影到物体上,而扭曲的条纹则由彩色相机捕捉。对彩色相机采集的图像进行分离,在红色通道和蓝色通道中分别获得被测物体的变形条纹信息。融合红蓝通道信息,消除测量阴影。从实验结果来看,系统的均方根误差(RMSE)约为6µm,该方法可以有效地解决小物体测量中的阴影问题。
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引用次数: 0
Investigation of p-polarized wave propagation through nonmagnetic chiral interfaces and slabs without and with dielectric loss p极化波通过无介质损耗和有介质损耗的非磁性手性界面和平板的传播研究
IF 1.3 4区 物理与天体物理 Q4 OPTICS Pub Date : 2023-01-02 DOI: 10.1080/09500340.2023.2166137
A. Muntaser, Monish R. Chatterjee
ABSTRACT Wave propagation through a nonmagnetic achiral/chiral (ACC) interface (en route to chiral/achiral (CAC) interfaces and resonant slabs) is investigated in-depth using amplitude Fresnel coefficients (FCs). A p-polarized plane wave at the interface is tracked for rarer-to-denser configuration, followed by incidence at a CAC interface under stand-alone and ACC source interface conditions. Finally, a model involving a low-loss tangent chiral dielectric is examined by investigating the corresponding reflection and transmission behaviour. Detailed understanding of the (anomalous or normal) occurrence of total internal reflection (TIR), inverse total internal reflection (ITIR), evanescence, – and – based envelope decay and propagation across the modes in the longitudinal and transverse directions. A few sample simulations involving chiral slab resonators with p-polarization incidence are also presented. In ongoing follow-up work, dual lossy interfaces combined to create chiral resonators and arrays (in the thick or thin film regimes) will be investigated building upon the results presented here.
摘要利用振幅菲涅耳系数(FC)深入研究了非磁性非手性/手性(ACC)界面(在到达手性/非手性(CAC)界面和共振板的途中)中的波传播。对界面处的p偏振平面波进行跟踪,以获得更稀疏到更密集的配置,然后在独立和ACC源界面条件下入射到CAC界面。最后,通过研究相应的反射和透射行为,检验了一个涉及低损耗正切手性电介质的模型。详细了解全内反射(TIR)、逆全内反射、倏逝、基于和基于包络的衰减以及在纵向和横向方向上跨模式传播的(异常或正常)发生。还介绍了一些涉及p偏振入射手性平板谐振器的模拟实例。在正在进行的后续工作中,将在本文给出的结果的基础上,研究结合双损耗界面来创建手性谐振器和阵列(在厚膜或薄膜区域)。
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引用次数: 1
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Journal of Modern Optics
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