{"title":"Beam correction and conjugated waves.","authors":"M Charnotskii","doi":"10.1364/JOSAA.608805","DOIUrl":"https://doi.org/10.1364/JOSAA.608805","url":null,"abstract":"<p><p>Full-plane conjugation of a beacon wave is the ultimate case of adaptive beam control for propagation in a random refractive medium. Here, we revisit the 40-year-old calculations [Sov. Phys. J.28, 894 (1985)SOPJAQ0038-569710.1007/BF00891733] of the mean irradiance of the beam created by a finite-aperture conjugation. We used wave optics simulations to confirm these theoretical results and discuss the implications of the effectiveness of the beacon-based beam control.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1354-1361"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149169892","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}
Victor V Kotlyar, Alexey A Kovalev, Anton G Nalimov, Ekaterina V Telegina
{"title":"Orbital energy flow in the paraxial focus of a plane wave, bounded by a circular aperture.","authors":"Victor V Kotlyar, Alexey A Kovalev, Anton G Nalimov, Ekaterina V Telegina","doi":"10.1364/JOSAA.605074","DOIUrl":"https://doi.org/10.1364/JOSAA.605074","url":null,"abstract":"<p><p>We investigate two cases of paraxial focusing of a plane wave-by a spherical lens with a circular aperture and by a cylindrical lens with a rectangular aperture. For these two cases, we obtain explicit analytical expressions for the longitudinal component of the canonical energy flow vector. These expressions indicate that the intensity in the focus has isolated nulls in longitudinal planes. Around these nulls, screw phase dislocations exist (longitudinal optical vortices) and the reverse energy flow arises. However, in contrast to nonparaxial light beams, the reverse energy flow is generated in a significantly subwavelength region. If the focusing lens has a numerical aperture of 0.1, this region has a transverse size of nearly 0.005 wavelengths, and the magnitude of the energy flow is nearly 10<sup>-7</sup> of the forward energy flow in the beam focus. Such a small reverse energy flow cannot be observed in an experiment and thus it can be neglected in practice.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1329-1335"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149170785","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}
Xunhong Chen, Yan Zhang, Shunda Wang, Dongyin Wang, Ping Jiang, Huajun Yang
{"title":"Design of a multi-beam optical antenna using a conical laser array and an H-H lens array and analysis of coupling efficiency.","authors":"Xunhong Chen, Yan Zhang, Shunda Wang, Dongyin Wang, Ping Jiang, Huajun Yang","doi":"10.1364/JOSAA.600874","DOIUrl":"https://doi.org/10.1364/JOSAA.600874","url":null,"abstract":"<p><p>An optical antenna structure consisting of a conical laser array and a hyperboloid-hyperboloid (H-H) lens array is proposed to circumvent the central obscuration problem in Cassegrain antennas and to enable the simultaneous transmission and optical fiber coupling of multi-wavelength beams through a common antenna primary mirror. The design process of the conical laser array and H-H lens array combination, as well as the effects of various parameters on crosstalk between beams, is systematically analyzed, and ray-tracing simulations of beam propagation through the H-H lens array, the Cassegrain antenna, and the coupling lens array are carried out based on the vector laws of refraction and reflection. The simulation results based on mode-overlap theory indicate that, after accounting for lens reflection and absorption losses, the average coupling efficiency of the optical system reaches 73.98%. Additionally, the system coupling efficiency curves under three types of fiber misalignment are numerically obtained, and the corresponding coupling tolerances are determined.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1480-1488"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149166356","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}
{"title":"Geometric phase mechanism behind experimental observation of vector polarization in Hermite-Gaussian superposition states.","authors":"A Srinivasa Rao, Quan Sheng","doi":"10.1364/JOSAA.605426","DOIUrl":"https://doi.org/10.1364/JOSAA.605426","url":null,"abstract":"<p><p>Superposition of orthogonal Hermite-Gaussian (HG) modes in orthogonal linear polarization states is one of the approaches used for the experimental realization of lower-order optical vector beams and vector vortex lattices. To date, it has generally been assumed that the vector characteristics observed in such systems originate from the spatial intensity distribution of the superposed HG modes. Here, we demonstrate that the experimentally observed vector features arising during the characterization of HG-mode superposition states result from the combined effects of the azimuthally inhomogeneous intensity distribution and the polarization-dependent Pancharatnam-Berry (PB) geometric phase of light. Analytical calculations reveal that these vector characteristics are not intrinsically encoded in the superposition state itself; rather, they become observable through the action of polarization-selective optical elements employed during the characterization process. Furthermore, we experimentally verify the emergence of the PB geometric phase during the projection of orthogonally polarized spatial modes onto a common polarization state using a linear polarizer. The experimental observations provide direct evidence for the involvement of the PB geometric phase in the polarization characterization of HG-mode superposition states. These findings offer a fundamental clarification of the physical origin of the vector features experimentally observed in HG-mode superposition and provide new insight into the interpretation of vector beam generation based on mode superposition techniques.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1362-1371"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149167290","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}
{"title":"Non-line-of-sight imaging via physics-informed cascade learning.","authors":"Rui Zhao, Yifan He, Yi-Ming Lin, Rui Chen","doi":"10.1364/JOSAA.593401","DOIUrl":"https://doi.org/10.1364/JOSAA.593401","url":null,"abstract":"<p><p>Non-line-of-sight (NLOS) imaging enables the reconstruction of hidden scenes by analyzing indirectly reflected light, with broad applications in autonomous driving, security monitoring, and rescue operations. However, high-fidelity reconstruction is often hindered by the coupling of single-photon avalanche diode (SPAD) detector noises (e.g., dark count rate and time jitter) and the intrinsic ill-posedness of the underlying inversion problem. We propose a physics-informed cascade learning (PICL) method, a framework that integrates model-driven denoising with self-supervised, physics-informed reconstructions. PICL employs a cascaded architecture comprising two specialized networks: a lightweight, SPAD-specific noise separation network (Net1) to decouple signal from mixed interference, followed by a reconstruction network (Net2) that embeds a differentiable forward physical model. This architecture eliminates the need for NLOS large-scale paired datasets while preserving physical consistency. Validated on both synthetic and experimental datasets, PICL demonstrates superior robustness under low-SNR conditions, achieving performance improvement over the state-of-the-art methods. By bridging hardware constraints with algorithmic adaptability, this work provides a scalable and robust paradigm for high-resolution NLOS imaging.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"E9-E18"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149167292","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}
{"title":"Reconstruction method of computationally convolutional ghost imaging based on total variation regularization.","authors":"Sicheng Gu, Yuqiao Zeng, Haoyi Zuo","doi":"10.1364/JOSAA.599165","DOIUrl":"https://doi.org/10.1364/JOSAA.599165","url":null,"abstract":"<p><p>To address the problems of severe noise and blurred edge structures in the reconstruction results of computationally convolutional ghost imaging (CCGI) under low sampling rates, this paper introduces total variation regularization and incorporates it into the CCGI reconstruction framework, thereby proposing a TV-based CCGI reconstruction method (TV-CCGI). By establishing a unified imaging model and combining numerical simulations with experimental validation, a systematic comparative analysis of the reconstruction performance of CCGI and TV-CCGI is carried out. The experimental results demonstrate that, under the same sampling rate, the proposed TV-CCGI method achieves significant improvements in noise suppression, preservation of target edge structures, and overall reconstruction quality. In particular, these advantages become more pronounced under low sampling rates, which verifies the effectiveness, stability, and superiority of the proposed method.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1372-1379"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149170055","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}
Mondher Besbes, Yassine Ferhi, Henri Benisty, Christophe Sauvan
{"title":"Fourier finite-difference method and proper orthogonal decomposition for the quick spectral study of 2D periodic photonic structures.","authors":"Mondher Besbes, Yassine Ferhi, Henri Benisty, Christophe Sauvan","doi":"10.1364/JOSAA.607379","DOIUrl":"https://doi.org/10.1364/JOSAA.607379","url":null,"abstract":"<p><p>We present an original rigorous numerical method for calculating light diffraction by three-dimensional photonic structures with a two-dimensional periodicity. It is based on Fourier expansions in the two periodic directions and an elegant yet efficient combination of finite-difference discretization and modal treatment in the propagation direction. The Fourier finite-difference method (FFDM) is cast into an easy-to-handle, agile, and efficient matrix formalism. It uses matrix inversions instead of eigenmodes computations, a strategy that confers a clear advantage in terms of computation time for the large Fourier truncation orders that are typically used to deal with micro- and nanophotonic structures of current interest. The computational gain increases with the Fourier truncation order. It is maximal (∼30) for structures with subwavelength thicknesses, since a small number of finite-difference steps is sufficient to achieve a relative accuracy of approximately 1%. Our approach is particularly well suited for the analysis of generalized grating structures and metasurfaces. A second advantage of the proposed method is the possibility of using model-order reduction techniques. We use proper orthogonal decomposition (POD) to further speed up the computation of diffraction spectra as a function of the frequency, the incident angle, or a geometric parameter.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1380-1393"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149170211","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}
{"title":"Random encoding illuminates Fourier ptychography: achieving uniform phase transfer characteristics for quantitative phase imaging.","authors":"Xia Wu, Ziyang Jiang, Peng Yang, Guannan He, Zhi Luo, Bo Huang","doi":"10.1364/JOSAA.600840","DOIUrl":"https://doi.org/10.1364/JOSAA.600840","url":null,"abstract":"<p><p>Fourier ptychography (FP) is a powerful computational imaging technique for reconstructing wide-field, high-resolution images. However, conventional FP and other standard quantitative phase methods exhibit non-uniform phase transfer characteristics. Consequently, accurately recovering linear phase ramps is impossible, as the captured images yield only constant values at certain spatial frequencies. To address this, we propose a novel, to our knowledge, FP approach that combines random spatial-domain coded illumination with a deep-learning-based phase recovery algorithm. The randomly encoded illumination guarantees a uniform phase response across the entire synthetic bandwidth, while the deep learning model effectively mitigates the multimodal confusion introduced by multiplexed random illumination. Ultimately, this enables robust and accurate quantitative phase reconstruction. Furthermore, our method reduces the FP data acquisition time and provides the flexibility to customize illumination schemes for specific sample characteristics, broadening its applicability in computational quantitative phase imaging.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1495-1501"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149167101","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}
{"title":"Structured Pearcey-prime Gaussian beams and phase-controlled trajectory engineering.","authors":"Yixuan Xie, Liping Zhang, Xuechun Zhang, Xueyao Qin","doi":"10.1364/JOSAA.606757","DOIUrl":"https://doi.org/10.1364/JOSAA.606757","url":null,"abstract":"<p><p>We present a unified framework for generating structured Pearcey-prime Gaussian beams (PePGBs) with controllable spatial profiles and propagation dynamics. By introducing a generalized radial mapping function, diverse beam structures, including circular, elliptical, petal-shaped, oscillator-like, star-shaped, and lattice configurations, are constructed at the input plane through controlled redistribution of transverse spatial frequencies. Phase modulation is further employed to engineer the beam trajectory without altering its initial structure. The results show that the beams propagate along parabolic paths, where the curvature is determined by the parameter <i>q</i> and its sign directly controls the bending direction. Using representative initial beams, we demonstrate that distinct propagation behaviors can be achieved under different phase conditions. The intensity and phase distributions confirm that the beam structure remains robust during propagation, indicating a decoupling between spatial formation and dynamical control. This approach provides a flexible strategy for structured light design and beam steering, with potential applications in optical manipulation and programmable photonic systems.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1401-1409"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149169795","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}
{"title":"Trapping of dielectric nanoparticles using a focused optical bottle beam.","authors":"G A Alakhaly, F M Thabit, M A Shukri","doi":"10.1364/JOSAA.606569","DOIUrl":"https://doi.org/10.1364/JOSAA.606569","url":null,"abstract":"<p><p>We investigate the optical trapping of positive- and negative-polarizability Rayleigh particles using a focused optical bottle beam generated by the <i>π</i>-phase superposition of a fundamental Gaussian mode and a radial Laguerre-Gaussian mode. The field propagation is described using the scalar Collins diffraction integral, and the resulting intensity, optical potential, gradient force, and scattering force are analyzed for a polystyrene nanosphere and an air bubble in water. The results demonstrate that the parity of the radial mode index <i>p</i> provides discrete control over the three-dimensional trapping topology. Odd-<i>p</i> modes retain a bright central region and generally favor central confinement of positive-polarizability particles, whereas even-<i>p</i> modes produce a central intensity null that supports dark trapping of negative-polarizability particles and displaced transverse trapping sites for positive-polarizability particles. The two parity families also exhibit different axial stability and distinct local confinement regimes, ranging from locally harmonic to soft quartic trapping.</p>","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":"43 9","pages":"1410-1419"},"PeriodicalIF":1.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149171553","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}