Journal of The Optical Society of America A-optics Image Science and Vision最新文献

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Routing light with different wavevectors using synthetic dimensions. 利用合成维度对不同波向的光线进行路由。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.519506
Xin Lyu, Kai Bai, Meng Xiao
{"title":"Routing light with different wavevectors using synthetic dimensions.","authors":"Xin Lyu, Kai Bai, Meng Xiao","doi":"10.1364/JOSAA.519506","DOIUrl":"https://doi.org/10.1364/JOSAA.519506","url":null,"abstract":"<p><p>Synthetic dimensions have drawn intense recent attention in investigating higher-dimensional topological physics and offering additional degrees of freedom for manipulating light. It has been demonstrated that synthetic dimensions can help to concentrate light with different frequencies at different locations. Here, we show that synthetic dimensions can also route light from different incident directions. Our system consists of an interface formed by two different photonic crystals. A synthetic dimension <i>ξ</i> is introduced by shifting the termination position of the photonic crystal on the right-hand side of the interface. We identify a correspondence between <i>ξ</i> and the interface state such that light incident from a specific direction can be collected. Thus, routing incident light from different directions is achieved by designing an interface with a proper distribution of <i>ξ</i>. Traditionally, this goal is achieved with a standard 4<i>f</i> optical system using a convex lens, and our approach offers the possibility for such a capability within a few lattice sites of photonic crystals. Such an approach reduces the size of the system, making it easier for integration. Our work provides, to our knowledge, a new direction for routing light with different momentums and possibly contributes to applications such as lidar.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Orientation-based solar noise impact on underwater and free-space optical wireless communication systems: experimental investigations. 基于方向的太阳噪声对水下和自由空间光无线通信系统的影响:实验研究。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.518008
Saroj Kumar Mahapatra, Manotosh Howlader, Sanjib Kumar Roy, Shailendra Kumar Varshney
{"title":"Orientation-based solar noise impact on underwater and free-space optical wireless communication systems: experimental investigations.","authors":"Saroj Kumar Mahapatra, Manotosh Howlader, Sanjib Kumar Roy, Shailendra Kumar Varshney","doi":"10.1364/JOSAA.518008","DOIUrl":"https://doi.org/10.1364/JOSAA.518008","url":null,"abstract":"<p><p>Solar noise, when it interferes with the received signal at the system receiver (Rx) of an optical wireless communication (OWC) system, degrades the system's performance. The detrimental effect of solar noise on OWC systems has been well established in the literature. This work experimentally demonstrates solar noise interference in the OWC system by pointing the system Rx in various orientations in air and water mediums, e.g., 0° (Rx pointing horizontally leftward), 45°, 90° (Rx pointing vertically downward), 135°, 180° (Rx pointing horizontally rightward), 225°, 270° (Rx pointing vertically upward), and 315°. The experimental outcomes depict the signal's noise content, spectral leakage, and roll-off rate variation at multiple Rx orientations. We also demonstrate the solar noise interference in transmitting an image through the outdoor underwater OWC link by pointing the system Rx in various orientations. Experimental demonstration confirms that the same OWC system never behaves identically in the presence of solar noise if the system Rx keeps changing its orientation during the maneuver.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Estimating the time-evolving refractivity of a turbulent medium using optical beam measurements: a data assimilation approach. 利用光束测量估算湍流介质的时变折射率:一种数据同化方法。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.518013
Anjali Nair, Qin Li, Samuel N Stechmann
{"title":"Estimating the time-evolving refractivity of a turbulent medium using optical beam measurements: a data assimilation approach.","authors":"Anjali Nair, Qin Li, Samuel N Stechmann","doi":"10.1364/JOSAA.518013","DOIUrl":"https://doi.org/10.1364/JOSAA.518013","url":null,"abstract":"<p><p>In applications such as free-space optical communication, a signal is often recovered after propagation through a turbulent medium. In this setting, it is common to assume that limited information is known about the turbulent medium, such as a space- and time-averaged statistic (e.g., root-mean-square), but without information about the state of the spatial variations. It could be helpful to gain more information if the state of the turbulent medium can be characterized with the spatial variations and evolution in time described. Here, we propose to investigate the use of data assimilation techniques for this purpose. A computational setting is used with the paraxial wave equation, and the extended Kalman filter is used to conduct data assimilation using intensity measurements. To reduce computational cost, the evolution of the turbulent medium is modeled as a stochastic process. Following some past studies, the process has only a small number of Fourier wavelengths for spatial variations. The results show that the spatial and temporal variations of the medium are recovered accurately in many cases. In some time windows in some cases, the error is large for the recovery. Finally, we discuss the potential use of the spatial variation information for aiding the recovery of the transmitted signal or beam source.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Twin-stagnation-free phase retrieval with vortex phase illumination. 利用涡相照明的无双滞相检索。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.516339
Muskan Kularia, Manidipa Banerjee, Kedar Khare
{"title":"Twin-stagnation-free phase retrieval with vortex phase illumination.","authors":"Muskan Kularia, Manidipa Banerjee, Kedar Khare","doi":"10.1364/JOSAA.516339","DOIUrl":"https://doi.org/10.1364/JOSAA.516339","url":null,"abstract":"<p><p>The recovery of a complex-valued exit wavefront from its Fourier transform magnitude is challenging due to the stagnation problems associated with iterative phase retrieval algorithms. Among the various stagnation artifacts, the twin-image stagnation is the most difficult to address. The upright object and its inverted and complex-conjugated twin correspond to the identical Fourier magnitude data and hence appear simultaneously in the iterative solution. We show that the twin stagnation problem can be eliminated completely if a coherent beam with charge-1 vortex phase is used for illumination. Unlike the usual plane wave illumination case, a charge-1 vortex illumination intentionally introduces an isolated zero near the zero spatial frequency region, where maximal energy in the Fourier space is usually concentrated for most natural objects. The early iterations of iterative phase retrieval algorithms are observed to develop a clockwise or anti-clockwise vortex in the vicinity of this isolated zero. Once the Fourier transform of the solution latches onto a specific vortex profile in the neighborhood of this intentionally introduced intensity zero in early iterations, the solution quickly adjusts to the corresponding twin (upright or inverted) and further iterations are not observed to bring the other twin into the reconstruction. Our simulation studies with the well-known hybrid input-output (HIO) algorithm show that the solution always converges to one of the twins within a few hundred iterations when vortex phase illumination is used. Using a clockwise or anti-clockwise vortex phase as an initial guess is also seen to deterministically lead to a solution consisting of the corresponding twin. The resultant solution still has some faint residual artifacts that can be addressed via the recently introduced complexity guidance methodology. There is an additional vortex phase in the final solution that can simply be subtracted out to obtain the original test object. The near guaranteed convergence to a twin-stagnation-free solution with vortex illumination as described here is potentially valuable for deploying practical imaging systems that work based on the iterative phase retrieval algorithms.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Evaluating the beam shape coefficients of Bessel-Gauss beams with radial quadrature: a comparison with angular spectrum decomposition and finite series methods. 用径向正交法评估贝塞尔-高斯光束的波束形状系数:与角谱分解法和有限级数法的比较。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.520876
Siqi Tang, Mengyang Wang, Jianqi Shen
{"title":"Evaluating the beam shape coefficients of Bessel-Gauss beams with radial quadrature: a comparison with angular spectrum decomposition and finite series methods.","authors":"Siqi Tang, Mengyang Wang, Jianqi Shen","doi":"10.1364/JOSAA.520876","DOIUrl":"https://doi.org/10.1364/JOSAA.520876","url":null,"abstract":"<p><p>The Bessel-Gauss beam (BGB) stands as a physically realizable beam extensively employed in applications such as micromanipulation and optical trapping. In these contexts, the assessment of beam shape coefficients (BSCs) becomes imperative. Previous research reveals that the BSCs of the BGBs obtained with different methods deviate from each other under certain circumstances. In this paper, the formulation of BSCs employs the radial quadrature method, and a comparative analysis is conducted with counterparts formulated using the angular spectrum decomposition and the finite series technique. Contributions stemming from evanescent waves and the situation of the BSC blowing-ups are discussed, offering a deep insight of pertinent BSC evaluation methods. The paper provides an alternative approach for calculating the BSCs of the BGBs.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Three-dimensional freeform reflector design with a microfacet surface roughness model. 利用微面表面粗糙度模型进行三维自由曲面反射器设计。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.522862
Vì C E Kronberg, Martijn J H Anthonissen, Jan H M Ten Thije Boonkkamp, Wilbert L IJzerman
{"title":"Three-dimensional freeform reflector design with a microfacet surface roughness model.","authors":"Vì C E Kronberg, Martijn J H Anthonissen, Jan H M Ten Thije Boonkkamp, Wilbert L IJzerman","doi":"10.1364/JOSAA.522862","DOIUrl":"https://doi.org/10.1364/JOSAA.522862","url":null,"abstract":"<p><p>This paper proposes a methodology for the design of freeform reflectors with scattering surfaces. We use microfacets, which are small, tilted mirrors superimposed on a smooth surface. We form a simple model of surface roughness and light scattering based on the orientations of the microfacets. Using a least-squares solver to compute the smooth reflector as a starting point, we can subsequently alter the surface using an optimization procedure to account for the scattering. After optimization, the resulting reflector surface produces the desired scattered light distribution. We verify the resulting reflector using raytracing. This study focuses on freeform systems with a collimated incident beam and a far-field target intensity.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Vision-based algorithm for online TIG welding deviation detection of stainless steel welded pipes. 基于视觉的不锈钢焊管氩弧焊偏差在线检测算法。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.509496
Huaishu Hou, Tong Wang, Jinhao Li, Yong Zhang, Chenhuai Tang
{"title":"Vision-based algorithm for online TIG welding deviation detection of stainless steel welded pipes.","authors":"Huaishu Hou, Tong Wang, Jinhao Li, Yong Zhang, Chenhuai Tang","doi":"10.1364/JOSAA.509496","DOIUrl":"https://doi.org/10.1364/JOSAA.509496","url":null,"abstract":"<p><p>Tungsten inert gas (TIG) welding is the main welding process in the production of stainless steel welded pipe. According to the morphological characteristics of the welding molten pool image during the TIG welding process of stainless steel welded pipes, the exact position of the tungsten needle tip is calculated using image moments. Extract the weld region in the contour of the molten pool, interpolate the contour curve based on the cubic B-spline curve interpolation method, utilize the characteristics of the S-G filter, remove the interference coordinates in the contour curve through the detrending of the contour curve, extract the weld feature points, and realize the accurate identification of weld seams. The experimental results show that the method can accurately calculate the welding deviation in the welding process.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Improper statistics of the radiation from a randomly rotating source. 随机旋转源的辐射统计不准确。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2024-06-01 DOI: 10.1364/JOSAA.515613
Mikhail Charnotskii
{"title":"Improper statistics of the radiation from a randomly rotating source.","authors":"Mikhail Charnotskii","doi":"10.1364/JOSAA.515613","DOIUrl":"https://doi.org/10.1364/JOSAA.515613","url":null,"abstract":"<p><p>In a previous study [J. Opt.19, 0905603 (2017)JOOPDB0150-536X10.1088/2040-8986/aa7cac], we revealed that the complete second-order statistics of narrowband polarized waves are characterized by 13 parameters, in contrast to the four parameters of the traditional Stokes vector description of the statistics of partially polarized light. In this study, we analyzed the second-order statistics of the field of a randomly rotating source of electromagnetic radiation and showed that it includes covariance of the right- and left-circular polarizations that are not captured by the Stokes vector formalism. We illustrate this finding using simple examples of rotating quadrupoles and dipole pairs.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141296251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Generation of flattop beams from a distorted optical field by the wavefront shaping technique. 通过波前整形技术从扭曲的光场产生平顶光束。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-10-01 DOI: 10.1364/JOSAA.502993
Hang Sun, Haoran Li, Ziyang Chen, Xiaoyan Wu, Guodong Liu, Jixiong Pu
{"title":"Generation of flattop beams from a distorted optical field by the wavefront shaping technique.","authors":"Hang Sun,&nbsp;Haoran Li,&nbsp;Ziyang Chen,&nbsp;Xiaoyan Wu,&nbsp;Guodong Liu,&nbsp;Jixiong Pu","doi":"10.1364/JOSAA.502993","DOIUrl":"https://doi.org/10.1364/JOSAA.502993","url":null,"abstract":"<p><p>Uniform laser beams with controllable patterns are crucial for various applications, including laser processing and inertial confinement fusion. While some methods have been proposed to generate flattop beams, they often require complex optical systems that can become ineffective because of the misalignment of the system or the imperfection of optical elements. To overcome these issues, we utilized feedback-based wavefront shaping (FWS) technology to generate flattop beams with desired patterns from a disordered light. To solve the multi-goal optimization problem, we propose some modifications based on the Non-dominated Sorting Genetic Algorithm II (NSGA2) and successfully generate focal beams with a uniform intensity distribution and controllable beam shape from the disordered light field.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49678927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Joint SIC and power allocation for a multi-user paired UWOC-NOMA system in a turbulence environment. 湍流环境中多用户配对UWOC-NOMA系统的联合SIC和功率分配。
IF 1.9 3区 物理与天体物理
Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-10-01 DOI: 10.1364/JOSAA.493679
Yanjun Liang, Hongxi Yin, Xiuyang Ji, Jianying Wang, Zhongwei Shen
{"title":"Joint SIC and power allocation for a multi-user paired UWOC-NOMA system in a turbulence environment.","authors":"Yanjun Liang,&nbsp;Hongxi Yin,&nbsp;Xiuyang Ji,&nbsp;Jianying Wang,&nbsp;Zhongwei Shen","doi":"10.1364/JOSAA.493679","DOIUrl":"https://doi.org/10.1364/JOSAA.493679","url":null,"abstract":"<p><p>This paper proposes a staircase joint optimization scheme (SJOS) with alternating diagonal interference cancellation and power allocation in an underwater wireless optical communication system based on nonorthogonal multiple access (UWOC-NOMA) with the multi-user paired. The scheme employs the directional iteration to alternatively optimize the subproblems of the interference cancellation and the power allocation. Furthermore, a one-way sorting algorithm based on the alternating diagonal interference cancellation and power allocation subalgorithm based on the conjugate gradient method are presented to solve the two subproblems, respectively. Simulation results show that the algorithm effectively reduces the average outage probability of the system with fast convergence, even with an increase in the number of paired users.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49678928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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