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Double-clad photonic crystal fibre for two-photon microscopy J. Mod. Optic. (IF 1.3) Pub Date : 2024-02-21 Huizhen Xu, Xiulin Wang, Dongqing Peng
Miniaturized and head-mountable scanning nonlinear fibre-optic microscopy offers an exciting opportunity for the visualization of brain activity on freely walking mice. One challenge in the creatio...
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Photonic generation of tunable wideband dual-chirp microwave waveforms using a monolithic integrated three-section laser J. Mod. Optic. (IF 1.3) Pub Date : 2024-02-14 Shilin Chen, Tao Pu, Li Wang, Jilin Zheng, Gengze Wu, Jin Li, Xin Zhang, Menghan Liu, Jiaqi Zhao
A method for flexibly generating dual-chirp microwave waveform (DCMW) is proposed and experimentally demonstrated. The scheme uses a monolithic integrated three-section laser, which consists of a f...
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Passive Q-switched pulse fibre laser with molybdenum titanium aluminum carbide (Mo2TiAlC2) saturable absorber J. Mod. Optic. (IF 1.3) Pub Date : 2024-02-09 M. A. Z. Zaini, M. F. A. Rahman, A. A. Latiff, M. F. M. Rusdi, I. A. Z. Roslan, S. W. Harun
In our study, we employed a Mo2TiAlC2 thin film as a passive saturable absorber (SA) to create a stable pulsed fibre laser at 1564.52 nm. We synthesized a Mo2TiAlC2-PVA thin film with a 6% modulati...
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Breast mass regions classification from mammograms using convolutional neural networks and transfer learning. J. Mod. Optic. (IF 1.3) Pub Date : 2024-02-06 Yuliana Jiménez-Gaona, María José Rodríguez-Álvarez, Diana Carrión-Figueroa, Darwin Castillo-Malla, Vasudevan Lakshminarayanan
This study introduces a novel approach aimed at enhancing the quality of digital mammography images through pre-processing techniques, to improve breast cancer detection accuracy. The primary objec...
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Parameter determination for the optical path of digital holography based on improved particle swarm optimization J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-11 Yuan Chen, Yuhui Fan, Shaonan Liang, Ming Dong, Hongwei Ma, Xiang Wan
In digital holography (DH), the key parameters in the optical path structure, such as diffraction distance, optical path difference and deflection angle, affect greatly the image quality of hologra...
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Quantum dots in the attosecond pulse train J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-09 D.R. Mašović
The problem of quantum dots in the attosecond pulse train as a kicking field is considered. The possibility of the kicking field to generate any secondary radiation is examined. The focus is on con...
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An optimal principal component analysis method for carrier removal in Fourier transform profilometry J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-08 Xin Lai, Xin Chen
To improve the reconstruction accuracy in the fringe projection profilometry (FPP), a bidimensional empirical mode decomposition and principal component analysis (BEMD&PCA) algorithm are proposed t...
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Method of unwrapped phase error correction in phase-measuring profilometry based on adaptive local window J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-02 Lang Zou, Chen Luo, Jiale Sun, Yijun Zhou
Phase measurement profilometry (PMP) is widely used to reconstruct three-dimensional (3D) shape of objects. However, errors are introduced during standard phase unwrapping process, which considerab...
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Robust binary fringe pattern optimization for optical three-dimensional shape measurement J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-02 Feng Lu, Jikun Yang
Current studies show that binary fringe patterns can be optimized in the phase or intensity domain. The problem with the former is the poor sensitivity to defocusing levels and the problem with the...
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High accurate and modulation transparent frequency offset compensation scheme using data-aided feedback structure in coherent optical communication systems J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-02 Luyang Guan, Peng Xie, Yuanfan Zhao, Xuefeng Zhang, Nan Feng, Cheng Ju
The high-order modulation format has the advantages of high spectral efficiency and large system capacity. However, the traditional frequency offset estimation and compensation algorithms, such as ...
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Optical multi-image encryption scheme with chaotic apertured quaternion fractional Mellin transform J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-02 Jing-Yi Dai, Nan-Run Zhou
To enhance the encryption quality and the transmission efficiency, an optical compression and encryption scheme for multiple images based on chaotic apertured quaternion fractional Mellin transform...
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Unambiguous correct discrimination of real quantum states J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-02 Shi-Jun Zhang, Wen-Hai Zhang
We investigate the unambiguous correct discrimination strategy of a set of linearly independent equidistant real quantum states and three sets of three linearly independent states. The measurement ...
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Numerical investigation on Coulomb impact on bouquetlike photoelectron momentum distributions J. Mod. Optic. (IF 1.3) Pub Date : 2024-01-02 Shenghua Zhang, Guizhong Zhang, Kecheng Liu, Wei Shi, Jianquan Yao
Deploying the strong-field approximation and the saddle point methods, we numerically simulate the Coulomb impact on the bouquetlike photoelectron momentum distributions (PMDs) induced by intense l...
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Double image encryption based on a hybrid phase-truncation scheme J. Mod. Optic. (IF 1.3) Pub Date : 2023-12-18 Guangyu Luan, Chenggen Quan
We propose a double image encryption approach based on a hybrid phase-truncation scheme. This approach is realized by spatial and Fresnel encoding, where two plaintexts are encrypted by a random am...
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One-dimensional far-field super-resolution imaging without missing k-space regions J. Mod. Optic. (IF 1.3) Pub Date : 2023-11-05 Deng Xie
The lack of parts of k-space regions will lead to the missing of some spatial frequencies and even generate artificial details in super-resolution imaging. We report a convenient scheme constructed...
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Robust noise hybrid active contour model for infrared image segmentation using orientation column filters J. Mod. Optic. (IF 1.3) Pub Date : 2023-11-05 He Zhang, Weixian Qian, Minjie Wan, Kaimin Zhang, Fan Wang, Xiaofang Kong, Qian Chen, Dongming Lu
Infrared (IR) image segmentation plays an important role in many applications of night vision, including pedestrian detection, security monitoring, etc. However, the precision is constrained by edg...
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THz properties of two food additives sodium solution based on microfluidic chips J. Mod. Optic. (IF 1.3) Pub Date : 2023-11-05 Bo Peng, Siyu Qian, Boyan Zhang, Qingjun Li, Bo Su, Hailin Cui, Shengbo Zhang, Cunlin Zhang
The vibration and rotation energy levels of many molecules are in the terahertz (THz) band, so THz spectroscopy can be used to qualitatively identify substances. However, the THz spectrum of most m...
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Similarity-sequenced multi-view discriminant feature extraction for image recognition J. Mod. Optic. (IF 1.3) Pub Date : 2023-11-05 Shuzhi Su, Kaiyu Zhang, Yanmin Zhu, Maoyan Zhang, Shexiang Jiang
Traditional multi-view feature extraction methods based on manifold learning frequently overlook the similarity sequence between samples, failing to capture the intrinsic manifold structure of raw ...
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Inversion of seawater temperature, salinity, and sound velocity based on Brillouin lidar J. Mod. Optic. (IF 1.3) Pub Date : 2023-11-05 Yufeng Yang, Mengjie Shangguan
In this study, a two-parameter inversion model is used to improve the accuracy of seawater temperature and salinity inversion. Furthermore, a novel model is proposed to invert the seawater sound ve...
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A phase error compensation method for three-dimensional shape measurement using improved iteration algorithm J. Mod. Optic. (IF 1.3) Pub Date : 2023-11-05 Xin Meng, Shifeng Wang, Peng Zhang, Feng Qian, Jun Ma, Jin Meng, Kaiyue Du, Bo Lu, Shigeng Song
The binary defocusing has been extensively studied in the three-dimensional measurement. But if the projector is slightly defocused, the binary fringes after defocusing still contain high-order har...
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Light attenuation analysis based on integral equations J. Mod. Optic. (IF 1.3) Pub Date : 2023-10-18 Linli Sun
The shadowing and masking of a rough surface is an important problem for reflection models in computer graphics. The widely used Smith’s geometry attenuation factor (GAF) takes a few factors such a...
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Performance analysis of modulating retro-reflector optical communication system based on an Airy beam J. Mod. Optic. (IF 1.3) Pub Date : 2023-10-18 Yunyi Qin, Zhiyong Xu, Jingyuan Wang, Jianhua Li, Mengtong Xie, Jiyong Zhao, Ailin Qi
Average Bit Error Rate (BER), outage probability and average channel capacity expressions of a Modulating Retro-Reflector (MRR) optical communication system based on an Airy beam under weak turbule...
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Improving light trapping abilities of double-textured AZO films via etching seed layers J. Mod. Optic. (IF 1.3) Pub Date : 2023-10-18 Jiang Zhu, Daqiang Hu, Ying Wang, Chunlei Tao, Jian Liu
The crater-nanorod-like double-textured ZnO:Al (AZO) transparent conducting films were prepared by combining wet-etching AZO seed layers and hydrothermal growing AZO nanorods. Different morphologie...
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Improved design method for suppressing optical focal spots and experimental verification J. Mod. Optic. (IF 1.3) Pub Date : 2023-10-18 Tao Liu, Jiaqi Hu, Tao He, Qiang Liu, Shanshan Chen, Shuming Yang, Guodong Zhang, Guanghua Cheng
Pupil filtering is an effective method to modulate the 3D point spread function distribution of an optical system. Based on vector Debye-Wolf diffraction integral and a new fusion optimization algo...
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A fluorescent probe of CH3NH3PbBr3 perovskite quantum dots on polystyrene nanofibres for the detection of copper ions J. Mod. Optic. (IF 1.3) Pub Date : 2023-10-18 Sizhong Yi, Yuanhao Huang, Jie Zou, Yuheng Wang, Jiawen Jian, Qinghui Jin, Xiaowei Zhang, Xin Zhang
Recently, metal halide perovskite quantum dots (MHPQDs) have attracted considerable interest in sensing activities due to their excellent optoelectronic properties and high surface activity. Here, ...
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Profilometry by zero-order interference fringe identification in the Commission Internationale de l’Eclairage system J. Mod. Optic. (IF 1.3) Pub Date : 2023-10-18 Alexandra Plata Planidina, Carolina Mendoza Luna, Jáder Enrique Guerrero Bermúdez, Arturo Plata Gómez
In this study, a numerical procedure is proposed to determine the optical contact (peak of the coherence function) in a scanning white light interferential microscope. The Red, Green and Blue image...
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A two-stage synthetic non-local mean (NLM) filtering method for efficient denoising in quantitative phase imaging (QPI) J. Mod. Optic. (IF 1.3) Pub Date : 2023-10-09 YuJuan Sun, YaWei Wang, Furui Tang, Yan Geng, YuanYuan Xu, Min Bu
To improve the accuracy of phase recovery in quantitative phase imaging, a novel two-stage synthetic denoising method is proposed in this paper. In this method, to avoid the loss of effective detai...
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Hyperspectral images classification for white blood cells with attention-aided convolutional neural networks and fusion network J. Mod. Optic. (IF 1.3) Pub Date : 2023-08-30 Weidong Shao, Chunxu Zhang, Jinghan Wang, Xiaolin He, Dongxia Wang, Yan Lv, Yue An, Huihui Wang
The classification of White blood cells (WBCs) plays an important role. However, the traditional method of blood smear analysis is laborious. This paper presented a classification method of WBCs based on hyperspectral images and Deep learning (DL). The U-net network was proposed to extract spectral features of WBCs region of interest (ROI) under the pseudo-color images with specific hyperspectral images
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Eight-channel C-Band demultiplexer based on one-dimensional photonic crystals defected with lithium niobate J. Mod. Optic. (IF 1.3) Pub Date : 2023-08-28 Khedr M. Abohassan, Hassan S. Ashour, Sofyan A. Taya, Malek G. Daher
We propose an eight-channel Dense Wavelength Division Demultiplexer (DWDM) device based on one-dimensional photonic crystal (1-D PC) structures defected with lithium niobate (LiNbO3) thin films. The demultiplexer operates in the C-band window (1460–1560 nm), which belongs to the ITU grid for DWDM applications. The desired output wavelength is achieved by applying the proper external electric field
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Astrophotonics-assisted 5G communication system within radio astronomy areas without introducing RFI effects J. Mod. Optic. (IF 1.3) Pub Date : 2023-08-26 Reinhard Karembera, James Jena, Tim Gibbon
We have demonstrated spectrum sharing and coexistence between a 5G network and a radio telescope without causing interference to the radio astronomer. This was realized by using optical heterodyning between two distributed feedback (DFB) semiconductor lasers as a flex-spectrum photonic RF transmitter. The 5G network was designed to identify and avoid any radio frequency interference (RFI). The generated
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The relative Fresnel goos-Hänchen phase crossover and its applications in quantum computation J. Mod. Optic. (IF 1.3) Pub Date : 2023-08-26 S. A. Carvalho, G. T. C. Cruz, J. A. O. Huguenin, W. F. Balthazar
In this work, we present the relative Fresnel (Goos-Hänchen) phase crossover between the total internal reflection and diffusion regimes by employing polarization tomography. This powerful technique not only enables us to access information about the amplitude and relative phase of the state for total reflection but also facilitates the identification of the transition between these regimes. In all
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Optical band gap engineering of phosphotungstic acid upon hybridization with hexamine-nickel and -cobalt for solar/visible light photocatalysis: a combined experimental and theoretical approach J. Mod. Optic. (IF 1.3) Pub Date : 2023-08-01 Mehdi Taghdiri, Fatemeh Akbarian, Aezam Dehghani-Firoozabadi, Reza Behjatmanesh-Ardakani, Seyed Hossein Banitaba, Hamid Reza Zare-Mehrjardi
Two new organic hybrids of phosphotungstic acid (PTA) were prepared by means of hexamine complexes of nickel and cobalt. The effects of complexes were studied on the photocatalytic activity of PTA. The hybrids were characterized by elemental analyses, FTIR, powder XRD and TGA. The optical band gaps of phosphotungstate-hexamine-nickel and phosphotungstate-hexamine-cobalt were estimated from the diffuse
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Nanosecond passively Q-switched Nd: YVO4 laser based on BP/InSe saturable absorber J. Mod. Optic. (IF 1.3) Pub Date : 2023-07-18 Jianlei Wang, Lingbo Cai, Liangyue Xie, Jun Liu, Zijun Zhong, Zhi Liu, Jing Han, Xianfeng Meng, Quanlan Xiao, Chun Wang
We report on a compact 808 nm diode-pumped passively Q-switched (PQS) Nd:YVO4 laser at 1064 nm with black phosphorus (BP)/ indium selenide (InSe) heterostructure as a saturable absorber (SA). When the transmission of the output coupler (OC) was 30%, the maximum continuous-wave (CW) output power of 10.3 W was obtained with a slope efficiency of 52.4% under the incident pump power of 22 W. The maximum
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Absolute phase recovery with multiple-wavelength fringes J. Mod. Optic. (IF 1.3) Pub Date : 2023-07-14 Jiale Long, Jianmin Zhang, Jiangtao Xi, Yi Ding, Fujian Chen, Zihao Du
In a recent work, a technique was proposed to recover the absolute phase maps of fringe patterns with two or three selected fringe wavelengths with the aim to improve anti-error capability. To further increase the anti-error capability associated with the phase unwrapping operation, multiple fringe patterns with different wavelengths may also be used. In this paper, we present a general rule to select
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Experimental optimization design synthesis and up-conversion luminescence properties of YNbO4:Ho3+/Yb3+ J. Mod. Optic. (IF 1.3) Pub Date : 2023-07-13 Shengyi Liu, Duan Gao, Li Wang, Wenbin Song, Qianmiao Yu, Yongbo Wen, Xilai Zhang
In order to obtain the maximum green up-conversion luminescence intensity of Ho3+/Yb3+ co-doped YNbO4, a uniform design and a quadratic general rotation combination design were applied to optimize the doping concentration. The concentration of the rare earth corresponding to the strongest green luminescence intensity was determined to be 10% Ho3+/34.9% Yb3+. Maximum luminous intensity of green light
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A study on the design, morphology and electro-optical properties of polymer dispersed liquid crystal films doped with Sudan black B dye J. Mod. Optic. (IF 1.3) Pub Date : 2023-07-11 Farzana Ahmad, M. Jamil, Park Woo Hyun, M. Luqman, Shagufta Sajjad, Musa Kaleem Baloch
To fabricate and use PDLC-based smart windows, electro-optical (EO) properties such as high transparency at low driving voltages, high contrast ratios (CR), and a wide viewing angle are critical. Thus, there is always a need to either develop new materials with excellent performance or to improve the existing ones. Doping materials (other than the LC and polymeric materials) such as dyes and nanomaterials
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Spatial intensity correlations of Mathieu speckle fields J. Mod. Optic. (IF 1.3) Pub Date : 2023-07-06 Cristian Hernando Acevedo, Yezid Torres Moreno, Jose Rafael Guzman-Sepulveda, Aristide Dogariu
Analytical expressions are derived for the spatial coherence function of a speckle field that is generated by the scattering of a Mathieu beam from a random phase mask by following the Fresnel diffraction theory. The general results in the free-space propagation show that the intensity correlation factor is a function of the order of the Mathieu beam, and it evolves spatially as the speckle field propagates
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Ultrafast laser micromachining of angled surfaces in fused silica J. Mod. Optic. (IF 1.3) Pub Date : 2023-07-05 Yusuf Dogan
Angled surfaces are significant for obtaining complex 3D glass structures to be employed in precise optical components such as light guides. However, it is challenging to fabricate angled structures in glass with high precision. In this study, femtosecond laser irradiation followed by a chemical etching process is used to create a 45-degree angled surface. The roughness values of the angled top and
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A study on angular distribution of THz radiation driven by two-colour laser-induced microplasma J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-16 Abolfazl Yousef-Zamanian, Mohammad Neshat
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
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Design of an RGB colour separation prism based on the maximum ratio of aperture to length J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-09 Yunfeng Jiang, Dongsheng Wu, Bing Zhou, Jie Liu, Fuyu Huang
We redesigned the RGB colour separation prism to decrease its size without reducing the light passing through and still obtain the efficient colour separation. The ideal dimensions of the prism based on the principles of the maximum ratios of aperture to length and aperture to height were calculated. The two aperture values were similar, but the field-of-view angle is 30.74° when the ratio of aperture
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Revisiting the experimental dielectric function datasets of gold in accordance with the Brendel-Bormann model J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-06 Farzad Firouzi, Sayed Khatiboleslam Sadrnezhaad
As a result of adopting various sample preparation techniques and optical measurement strategies, there are different experimental datasets available for presenting the complex dielectric function of gold. Therefore, evaluating them and selecting the most reliable ones seem essential for the corresponding optical-based designs and applications. The Brendel-Bormann model, one of the most accurate theoretical
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Modulation of the second-order sideband efficiency of a double-cavity optomechanical system by mechanical pumps J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-06 Qinghong Liao, Wenchao Kuang, Qingfa Xu
We study the effect of external mechanical pumps on the second-order sideband generation (SSG) efficiency in a double-cavity optomechanical system. The SSG efficiency can be tuned by changing the amplitude and phase of the mechanical pumps. When external mechanical pumps are applied to both mechanical resonators, the influence on the SSG efficiency is a superposition of the two mechanical pumps driven
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Optical spectra for a cholesteric elastomer doped with metallic nanospheres with an inversion defect J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-05 G. Reyes, J. A. Reyes
We are considering the propagation of circularly polarized light normally impinging on a cholesteric elastomer slab doped with metallic spheres. The slab is composed of two layers: the first layer is a right-handed chiral structure, and the second one is a helix with left-handedness; however, the pitch of the chiral structure remains constant. We performed a theoretical model to find numerically, reflection
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Research on elaborate image simulation method for close-range space target J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-02 Hongyuan Wang, Qianhao Ning, Zhiqiang Yan, Xiang Liu, Yinxi Lu
In order to meet the urgent needs of target image data in the testing of close-range space target situational awareness algorithm, an elaborate image simulation method that fully considers the target surface texture structure is proposed. First, the physical mechanism is analysed by constructing a radiation transmission model. Then, Phong and five-parameters BRDF models are adopted to characterize
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Photon bunching from an equilateral triangle of atoms J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-02 Qurrat-ul-Ain Gulfam
Fluorescent photon emission probability from a system of three atoms has been studied as a function of detection angles. The system under investigation consists of identical bi-level atoms forming an equilateral triangle. Only a single atom in the triangle is resonantly excited by a weak laser. The interaction mechanism among the atoms is the vacuum-mediated dipole–dipole interaction and the collective
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Preservation and enhancement of quantum correlations under Stark effect J. Mod. Optic. (IF 1.3) Pub Date : 2023-06-02 Nitish Kumar Chandra, Rajiuddin Sk, Prasanta K. Panigrahi
We analyse the dynamics of quantum correlations by obtaining the exact expression of Bures distance entanglement, trace distance discord, and local quantum uncertainty of two two-level atoms. Here, the atoms undergo two-photon transitions mediated through an intermediate virtual state where each atom is separately coupled to a dissipative reservoir at zero temperature in the presence of the Stark shift
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A dual-projector three-dimensional measurement model for shading problem of micro-scale object complex surface J. Mod. Optic. (IF 1.3) Pub Date : 2023-05-04 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
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OCT image denoising algorithm based on discrete wavelet transform and spatial domain feature fusion J. Mod. Optic. (IF 1.3) Pub Date : 2023-04-05 Wenyu Wei, Huaiguang Chen, Jing Gao, Shujun 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
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Synthetic wavelength scanning interferometry for 3D surface profilometry with extended range of height measurement using multi-colour LED light sources J. Mod. Optic. (IF 1.3) Pub Date : 2023-04-05 Priyanka Mann, Vishesh Dubey, Azeem Ahmad, Ankit Butola, Dalip Singh 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
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Mitigation of lateral misalignment in the optical set-up for the generation of perfect vortex beam by the radial shearing self-interferometric (RSSI) technique J. Mod. Optic. (IF 1.3) Pub Date : 2023-04-05 Swati Gangwar, Rajeev Dwivedi, V. K. Jaiswal, Ranjana Mehrotra, Shibu Saha, Parag 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
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Phase noise suppression based on iterative adaptive bilateral filter in digital holographic microscopy for topography measurement J. Mod. Optic. (IF 1.3) Pub Date : 2023-03-11 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
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An EEMD-based method for removing residual blood oxygen signal noise by combining wavelet and singular spectrum analysis J. Mod. Optic. (IF 1.3) Pub Date : 2023-03-06 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
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Optical encryption using structural uncorrelated characteristics of biological scattering media J. Mod. Optic. (IF 1.3) Pub Date : 2023-03-03 Aiping Zhai, Qing Han, Teng Zhang, Wenjing Zhao, Dong Wang
ABSTRACT Inspired by the unique internal structures with inherent anisotropy in biological tissues and their dynamic scattering characteristic, a simple and easy-to-fabricate optical encryption technique using structural uncorrelated characteristics of biological tissues was proposed. It can generate unique keys with the random characteristics of the tissues and transforms multiple image plaintexts
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R2F-UGCGAN: a regional fusion factor-based union gradient and contrast generative adversarial network for infrared and visible image fusion J. Mod. Optic. (IF 1.3) Pub Date : 2023-02-09 Yuning Xie, Gang Liu, Rui Xu, Durga Prasad Bavirisetti, Haojie Tang, Mengliang Xing
ABSTRACT To efficiently preserve texture and target information in source images, an image fusion algorithm of Regional Fusion Factor-Based Union Gradient and Contrast Generative Adversarial Network (R2F-UGCGAN) is proposed. Firstly, an adaptive gradient diffusion (AGD) decomposition algorithm is designed to extract representative features. A pair of infrared (IR) and visible (VIS) images are decomposed
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Investigation of p-polarized wave propagation through nonmagnetic chiral interfaces and slabs without and with dielectric loss J. Mod. Optic. (IF 1.3) Pub Date : 2023-01-18 A. Muntaser, M.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
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The off-axis moiré effect in double-layered cylinder J. Mod. Optic. (IF 1.3) Pub Date : 2023-01-17 Vladimir Saveljev
ABSTRACT The study presents the off-the-axis theory of the moiré patterns in a double-layered (coaxial) cylinder. The theory is based on the projected period and confirmed by the experiments with two devices. The results can be applied to moiré measurements, nanoparticles, and visual displays, particularly, to minimization of the moiré effect in curved/flexible displays (including 3D autostereoscopic
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Bandgap tailoring and optical response of InAlAs/InGaAs/GaAsSb double quantum well heterostructures: the impact of uniaxial strain and well width variations J. Mod. Optic. (IF 1.3) Pub Date : 2022-12-29 Md. Riyaj, Amit Rathi, A. K. Singh, Pushpalata, P. A. Alvi
ABSTRACT In this research work, a theoretical approach has been adopted to study GaAs-based InAlAs/InGaAs/GaAsSb type-II heterostructures. The 6 × 6 k·p Hamiltonian matrix with self-consistent calculations has been carried out to calculate the wavefunctions, localization of the charge carriers (probability density of charge carriers) and their dispersed energy states (Discrete energy level) under variable
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Paraxial propagation of cosine-hyperbolic-Gaussian beams in a chiral medium J. Mod. Optic. (IF 1.3) Pub Date : 2022-12-28 Z. Hricha, M. Lazrek, A. Belafhal
The properties of a linearly polarized cosine-hyperbolic-Gaussian beam (ChGB) propagating in a chiral medium are investigated theoretically by using the Huygens-Fresnel diffraction integral. Beam intensity distribution characteristics in the chiral medium are discussed with numerical examples. The linearly polarized ChGB is found to split into a superposition of left and right circularly polarized
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A multi-refraction-based 3D reconstruction method for underwater measurement with rotating scanning J. Mod. Optic. (IF 1.3) Pub Date : 2022-12-27 Li Xu, Yonghao Zhou, Xin Zhao
ABSTRACT This paper presents a novel reconstruction method based on multi-refraction to remedy the non-linear refraction, which recovers 3D geometry from 2D images. To simplify calibration, this paper prove that air calibration can replace underwater calibration. Finally, a multi-line rotating structured is designed to improve the measurement efficiency without additional equipment. The results of
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New cross-coupled resonator induced shifted absorption (CRISA) in double microring resonators using a cross-coupling-structure technique J. Mod. Optic. (IF 1.3) Pub Date : 2022-12-27 Benjamin B. Dingel, Bo Ye
We report, for the first time to the best of our knowledge, a technique that employs ′cross-coupling structure’ in the cascaded microring resonators (MRRs) to bring new optical analogues of quantum coherence phenomena. The new configuration resembles a standard double resonator (SDR) but uses cross-coupled–based directional couplers (DCs) instead of the typical direct-coupled–based DCs. One of its