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Dual-frequency and multi-linewidth laser based on self-injection locking for optical gyroscopes Opt. Commun. (IF 2.4) Pub Date : 2024-04-21 Jingtong Geng, Yuwei Li
Diverse resonant optical gyroscopes (ROG) exhibit unique lasers requirements and the optimal method involves integrating multiple functions into a singular laser device. Here, we introduce a simple dual-frequency multi-linewidth laser configuration for resonant optical gyroscopes, which uses self-injection locking technology for frequency stabilization and linewidth narrowing, generating the first
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Stacked subwavelength grating with high transmission Opt. Commun. (IF 2.4) Pub Date : 2024-04-19 Lei Zheng, Yu Zhang, Xinmiao Lu, Min Gao
We propose a stacked subwavelength grating scheme generated multi-mode coupling that is continuously tunable in the visible range with high transmittance. This scheme uses BK7 glass as the substrate, onto which a layer of polydimethylsiloxane (PDMS) thin film is added. Each layer of the stacked grating is composed of different materials, from top to bottom are Ag-MgF-BK7-Ag. By coupling different propagation
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Assessment of the definition varying with display depth for three-dimensional light field displays Opt. Commun. (IF 2.4) Pub Date : 2024-04-18 Jinhong He, Xunbo Yu, Xin Gao, Binbin Yan, Yixiang Tong, Xinhui Xie, Hui Zhang, Kaixin Shi, Xuanbin Hu, Xinzhu Sang
In the three-dimensional (3D) light field display (LFD), display quality is the most important concern, and from an intuitive perspective, the quality will decline with the increase of display depth. When evaluating display quality, definition is one of the indispensable indicators. However, there is no universally accepted quantitative measure in the 3D display like resolution in the two-dimensional
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Field-balancing alignment of the secondary mirror of space telescope using a self-calibrated model Opt. Commun. (IF 2.4) Pub Date : 2024-04-17 Zexia Zhang, Bing Dong
In-orbit alignment of the secondary mirror (SM) of deployable space telescopes is crucial for high-resolution imaging. Traditional alignment methods, which typically involve dedicated wavefront sensors or numerous iterations to optimize a metric function, are not well-suited for space applications. In this paper, an improved model-based SM alignment method is proposed. The term model refers to the
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The large-range strength-switchable circular dichroism in a mechanically reconfigurable chiral metasurface Opt. Commun. (IF 2.4) Pub Date : 2024-04-17 Xin Li, Huan Jiang, Jinrui Lin, Wenchang Zhu, Weiren Zhao
The strength-switchable circular dichroism (CD) is crucial in the fields of biological detection, analytical chemistry, In this paper, we achieved large-range strength-switchable CD by mechanically stretching polydimethylsiloxane (PDMS) substrate. With normal incidence, the traditional rotation symmetric 卍-shaped chiral array could exhibit obvious optical activity but near-zero CD. However, we found
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Optical vector-eigenmode decomposition for few-mode fibers through deep learning networks Opt. Commun. (IF 2.4) Pub Date : 2024-04-16 Jian-Jun Li, Rui Zhang, Feng Wen, Feng Yang, Bao-Jian Wu, Kun Qiu
For the optical vector-eigenmode (VE) decomposition, we introduce a novel deep learning-based optical-mode decomposition (OMD) technique for accurate retrieval of near-field beams generated from few-mode fiber (FMF) channel, in which this residual network (Resnet) scheme could obtain complete and accurate amplitude and phase coefficients from the near-field beams. For the case of 3 intra-module modes
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“Visible range curvature fiber-optic sensor with low strain-temperature dependence” Opt. Commun. (IF 2.4) Pub Date : 2024-04-16 Daniel Jauregui-Vazquez, Luis A. Herrera-Piad, Diana Tentori, Jose D. Castro-Toscano, Kristy C. Escalante-Sanchez, Eloisa Gallegos-Arellano, Juan M. Sierra-Hernandez
This manuscript introduces and demonstrates a visible curvature fiber optic sensor using an all-fiber Mach-Zehnder interferometer. The all-fiber interferometer was constructed using an in-line optical fiber sandwich structure, utilizing fibers specifically designed for the visible range. We demonstrate the reproducibility of the curvature sensor fabricating several distinct interferometers. These devices
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Chalcogenide metasurface heterostructures for enhancing optomechanical interaction Opt. Commun. (IF 2.4) Pub Date : 2024-04-16 Jin Yuan, Pengteng Li, Xin Zhang, Tianhua Feng, Zhaohui Li
Optomechanical interaction plays a more and more important role in the fields of quantum technology, information processing, and sensing, among others. Although brilliant achievements in enhancing optomechanical interaction have been made with microstructures, it is still a challenge to realize considerable optomechanical interaction of large active regions for conventional microcavities and waveguides
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Multiband laser stealth and long wave infrared stealth compatible metasurface based on Ge2Sb2Te5 Opt. Commun. (IF 2.4) Pub Date : 2024-04-16 xinye liao, zhaojian zhang, jie nong, junxiang zeng, xin li, xinpeng jiang, xin he, junbo yang
Achieving the stealth of both guided-laser and infrared band is becoming increasingly crucial with the development of laser active detection and passive infrared imaging. It is particularly challenging due to the conflicting requirements of high absorption and low emission in the wavelengths near 10.6 μm. To address this contradiction, we propose a multiband laser stealth and long wave infrared stealth
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Dual straight-wing FBG accelerometer for low-frequency vibration measurement Opt. Commun. (IF 2.4) Pub Date : 2024-04-16 Yuntian Teng, Liang Ge, Xiaoyong Fan, Chang Ge, Jiemei Ma
Fiber optic accelerometers have a wide range of applications in low-frequency vibration measurement, such as in earthquake monitoring, disaster early warning, underground resource exploration, and anti-seismic monitoring projects for critical structures like dams and bridges. In response to the current issues of Fiber Bragg Gratings (FBG) accelerometers being insensitive to low-frequency vibration
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Closed-form analytical model for plasmonic metasurfaces consisting of graphene disks Opt. Commun. (IF 2.4) Pub Date : 2024-04-15 Muyuan Deng, Kexin Zou, Bingying Chen, Peiwen Peng, Yijun Chen, Zhongmin Liu, Qingmao Zhang
In this paper, a closed-form analytical model is proposed for the fundamental plasmon mode of a metasurface of graphene disks. First, we derive an equivalent admittance for the graphene metasurface at the normal incidence of a plane wave using the Rayleigh expansion. This admittance is then expressed as a series -- circuit obtained by analyzing the integral equation that governs the surface current
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Generation of tunable continuous-wave THz signals using high-power multiple wavelengths DFB diode laser array Opt. Commun. (IF 2.4) Pub Date : 2024-04-15 Yingfei Wan, Chaodan Chi, Yiti Xiong, Yili Liu, Yanhui Shi, Hao Wang, Dan Lu, Chen Ji
We report a high-power multiple wavelengths distributed feedback (DFB) diode laser array chip for generating continuously tunable terahertz (THz) signals. Each laser within this laser array chip outputs a single-mode output power of up to 90 mW, with a maximum single-mode output power exceeding 120 mW, and the narrowest linewidth is 32.6 kHz. By employing optical heterodyne approach using a commercial
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Hybrid Fabry–Perot interferometer: Polymer-induced microcavity for temperature and gas pressure measurement Opt. Commun. (IF 2.4) Pub Date : 2024-04-15 Ling Chen, Jiajun Tian, Qiang Wu, Jiewen Li, Yong Yao, Jiawei Wang
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Broadband low-scattering and high-efficiency transmission radome by combining phase gradient metasurface and FSS Opt. Commun. (IF 2.4) Pub Date : 2024-04-15 Xiaoyan Pang, Tianhu Zhang, Mingze Hu, Han Zhang, Qi Zheng
In this paper, a novel method to achieve high-efficiency transmission radome with broadband low radar cross section (RCS) is proposed by combining phase gradient metasurfaces (PGMs) and frequency selective surface (FSS). The PGMs-FSS is an ultra-thin single-layered structure composed of a modified Jerusalem resonator backed with an FSS. The FSS works as a high-pass filter for transmitting the in-band
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Effect of finite temperatures on the dispersion properties of Surface Magnetoplasmon Polaritons in the Voigt reflection geometry Opt. Commun. (IF 2.4) Pub Date : 2024-04-14 G. Murtaza, G. Abbas, Z. Iqbal, G. Murtaza
Finite temperature effects are important within the interplay among surface plasmons and external magnetic fields. The research utilizes the linearized Vlasov–Maxwell version equations to find out the dispersion traits of Surface Magnetoplasmon Polaritons (SMPs) at the interface of a vacuum-semiconductor in the Voigt reflection geometry. The dielectric tensor components are expressed when it comes
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Controlled generation of OAM-switchable vortex beams at 639 nm from a Pr3+: YLF laser Opt. Commun. (IF 2.4) Pub Date : 2024-04-13 Wei Wang, Lijia Zhou, Jiantai Dou, Bo Li, Youyou Hu
In this paper, we reported and demonstrated a blue LD-pumped Pr: YLF laser for the controlled generation of orbital angular momentum (OAM) switchable vortex beams at 639 nm. To begin with, the quantitative tilt imbalance of the resonator was introduced to select the higher-order Hermite-Gaussian (HG) modes by utilizing the eigenvector method and introducing the concept of mode discriminant factor.
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Generation of needle-shaped beam with super-resolution spot and large depth of focus using diffractive optics Opt. Commun. (IF 2.4) Pub Date : 2024-04-12 Yuzhe Du, Cilong Zhang, Qiaofeng Tan
The finite depth of focus (DOF) of a focusing lens gives rise to the degradation of lateral resolution at defocused positions. Consequently, the generation of a needle-shaped beam with sub-diffraction size and extended DOF can break through this limitation, but few studies have effectively balanced these two characteristics. In this paper, we propose a method based on the stochastic parallel gradient
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Large field of view multi-point light focusing in strongly perturbed scattering media based on non-dominated bat algorithm wavefront shaping Opt. Commun. (IF 2.4) Pub Date : 2024-04-12 Yue Dai, Liang Yin, Minglong Hu, Junjie Zhou, Lina Zhao, Yingchun Ding
Wavefront shaping has become a powerful tool for controlling light through scattering media and enable the focusing and imaging of diffusive light. However, when facing with strong noise environments or scattering media being suddenly disturbed, this method becomes powerless. In addition, due to limitations of memory effects (ME) range, the field of view for imaging is very small. In this paper, we
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Noise equalization scheme based on probabilistic shaping and complex-valued ANN for dual-polarization continuous spectrum NFDM system with high-order modulation formats Opt. Commun. (IF 2.4) Pub Date : 2024-04-10 Qi Qi, Chenglin Bai, Yu Zhang, Ruohui Zhang, Fan Yang, Xinyu Chi, Zhihang Sun, Hengying Xu, Lishan Yang
In dual-polarization continuous spectrum nonlinear frequency division multiplexing (DP-CS NFDM) systems, the presence of noise destroys the independence between subcarriers in the nonlinear spectral domain (NSD). Additionally, as the modulation order and the number of subcarriers increase, the signal power increases and the effect of noise on the performance of the system becomes more severe. In this
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Generation of tunable vortex beams from a side-pumped Nd:YAG laser utilizing spot defect mirrors Opt. Commun. (IF 2.4) Pub Date : 2024-04-10 Hui Chen, Xiaowei Li, Yufan Cui, Boyuan Zhang, Xiaoyu Chang, Yaoyao Qi, Jie Ding, Bingzheng Yan, Yulei Wang, Zhiwei Lu, Zhihan Zhu, Zhenxu Bai
High-order vortex lasers are important for high angular momentum quantum entanglement and high-resolution spatial detection. However, traditional spatial phase modulation for Gaussian beams have difficulties achieving high-order and continuously adjustable optical vortex output. In this study, a high-order vortex laser output of continuously adjustable topological charges between 1 and 9 was obtained
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Deep learning assisted InAs/InP quantum-dash laser structured light modes detection under foggy channel Opt. Commun. (IF 2.4) Pub Date : 2024-04-10 Amr M. Ragheb, Mudassir Masood, Waddah Saif, Naveed Iqbal, Maged A. Esmail, Ahmed Almaiman, Habib Fathallah, Saleh Alshebeili, Mohammed Z.M. Khan
This paper demonstrates L-band quantum-dash laser (QDL) based orbital angular momentum (OAM) structured light in a free space optics communication (FSO) system. A 4-ary OAM-shift-keying pattern coding communication system, based on Laguerre Gaussian (LG) and superposition LG (MuxLG) mode families, has been investigated under a foggy FSO channel. In addition, joint mode identification and channel condition
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Incident angle optimization with multiple conflicting objectives based on BP-MOPSO in oblique laser interferometry Opt. Commun. (IF 2.4) Pub Date : 2024-04-10 Pengcheng Yang, Xiaocheng Li, Jie Meng, Jinjing Zhang, Xindong Zhu
The oblique incident phase-shifting interferometric measurement method is an effective technique for assessing gear tooth form deviation. In the measurement process, the tooth flank incident angle is a crucial factor determining the quality of interferograms. Addressing the challenge in traditional optical path design, where the selection of the tooth flank incident angle encounters a trade-off among
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Customized-accuracy simultaneous sensing of temperature, pressure and acoustic impedance based on FBS in optical fiber Opt. Commun. (IF 2.4) Pub Date : 2024-04-09 Pengkai Liu, Yuangang Lu, Wujun Zhang, Meng Zhu
In this work, it is proposed a novel customized-accuracy simultaneous sensing of temperature, pressure and acoustic impedance based on forward Brillouin scattering (FBS) in optical fiber. By observing the variations in frequency shift-temperature, frequency shift-pressure and frequency shift-acoustic impedance for different radial acoustic modes in certain types of fibers, we propose a novel method
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Propagation of the COAM matrix of a twisted Gaussian Schell-model beam Opt. Commun. (IF 2.4) Pub Date : 2024-04-09 Sushil Pokharel, Olga Korotkova
The Coherence-Orbital Angular Momentum (COAM) matrix elements of an optical beam describe its mode-to-mode radial correlations. An analytic expression for the COAM matrix of a Twisted Gaussian Schell-Model (TGSM) beam propagating in a vacuum is derived and analyzed in detail, with the help of the Huygens–Fresnel integral. Additionally, we show how to recover the cross-spectral density of the TGSM beam
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Interference among the neighboring sub-micron size harmonic particles Opt. Commun. (IF 2.4) Pub Date : 2024-04-08 Rabisankar Samanta, Sanjay K. Upadhyay, Sushil Mujumdar
In recent times, harmonic nanoparticles (HNPs) have gained considerable interest in many fields like nanophotonics, cell imaging, nanomedicine, etc. Unlike fluorescent particles and quantum dots, HNPs are photo-stable, non-bleaching, bio-compatible, and wavelength-flexible. Here, we explore second harmonic generation (SHG) from sub-micron size BaTiO (BTO) particles. BTO is a well-known perovskite material
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Distributed reservoir computing based nonlinear equalizer for VCSEL based optical interconnects Opt. Commun. (IF 2.4) Pub Date : 2024-04-08 Songte Zhang, Wenjia Zhang, Jiangbing Du, Zuyuan He
We propose a distributed reservoir computing based nonlinear equalizer for 106 Gbps VCSEL based optical interconnects. By comparing with neural network and Volterra series based equalizers, the computational complexity of this proposed nonlinear equalizer is significantly reduced in the training, prediction and inference process. 106 Gbps PAM4 short-range optical transmission is demonstrated by experiment
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Broadband enhancement of SiO2@TiO2 light-trapping nanostructure for improving the efficiency of perovskite solar cells Opt. Commun. (IF 2.4) Pub Date : 2024-04-08 Jingfeng Li, Sahibzada Muhammad Zaheer, Congxin Lao, Zhe Yin, Chenbo Gong, Yihao Guo, Aodi Li, Chaojie Guo, Fei Bian, Zhaopeng Xu
High-efficiency perovskite solar cells (PSCs) are one of the promising candidates to solve the energy crisis worldwide. Optical loss is one of the factors limiting the efficiency of PSCs and antireflection layers provide a dependable method for improving the efficiency of PSCs. Here, a design and optimization of PSCs with a SiO@TiO nanoparticles (NPs) antireflection layer is systematically studied
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Atmospheric turbulence mitigation of MIMO-RF/FSO DWDM communication systems using advanced diversity multiplexing with hybrid N-SM/OMI M-ary spatial pulse-position modulation schemes Opt. Commun. (IF 2.4) Pub Date : 2024-04-08 Ebrahim E. Elsayed
This paper introduces an assessment framework for the effectiveness of free-space optical (FSO) communication systems that combine multilevel modulation with the use of orbital angular momentum (OAM) for data stream multiplexing to enhance system bandwidth efficiency. The proposed system integrates pulse-position modulation (PPM) and dense wavelength-division multiplexing (DWDM) while addressing challenges
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Multi-nanoparticle recognition and tracking based on SPTGAN-YOLOv3 modeling Opt. Commun. (IF 2.4) Pub Date : 2024-04-06 Famin Wang, Jing Zhao, Huijian Liu, Yongyi Tan, Jingyi Gu, Yun Xiao, Weiguo He
Nanoparticle tracking techniques based on point spread function (PSF) engineering can monitor the movement of nanoparticles in 3D space in real time. However, increasing the axial tracking depth decreases the signal-to-noise ratio (SNR), which makes the reconstruction of nanoparticle trajectories more difficult. This paper proposes a deep learning-based object detection model SPTGAN-YOLOv3 for nanoparticle
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A study on resource allocation scheme for self-powered visible light communication and positioning systems Opt. Commun. (IF 2.4) Pub Date : 2024-04-06 Jianli Jin, Zihuan Liang, Huimin Lu, Huimin Kong, Xinling Liu, Danyang Chen, Hongyao Chen, Jianping Wang
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Enhancing second harmonic generation efficiency and effective nonlinear susceptibility via metasurfaces employing split-ring resonators Opt. Commun. (IF 2.4) Pub Date : 2024-04-05 Chung-Ting Chou Chao, Yuan-Fong Chou Chau
This paper investigates a remarkable second harmonic generation (SHG) conversion efficiency with high effective nonlinear susceptibility based on metasurface, and the investigation evaluates the optical properties using the finite element method in both the frequency and time domains. The proposed structure comprises noble metal and dielectric components, including a split-ring resonator (SRR) Ag rectangular
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Polarization domain walls in strong birefringent fiber resonators Opt. Commun. (IF 2.4) Pub Date : 2024-04-05 Ning Wang, Tianye Huang, Jianxing Pan, Chaoyu Xu, Gang Xu, Zhichao Wu, Xiang Li, Jie Tu, Huang Yu, Zuowei Yin, Yin Jie, Bao Huang, Jing Zhang
Domain walls form through a spontaneous symmetry-breaking, connecting two distinct symmetry-breaking solutions and enabling the interchange of two polarization modes. Currently, weakly birefringent fibers are employed for generating and examining domain walls. However, it remains challenging to generate domain walls in strongly birefringent fiber resonators since spontaneous symmetry-breaking is very
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Automatic processing of satellite laser ranging data based on image denoising technique Opt. Commun. (IF 2.4) Pub Date : 2024-04-05 Zequn Lv, Ning An, Cunbo Fan, Haitao Zhang, Guohai Zhao, Qingli Song, He Dong, Chengzhi Liu
Satellite Laser Ranging (SLR) data are typically pre-processed involves the manual screening method. However, this methodology heavily depends on the interpreter's expertise, potentially leading to concerns regarding decreased detection efficiency, limited automation, and sluggish processing speeds. This study introduces an automated processing approach using image denoising techniques. It involves
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Thermally tunable nonreciprocal radiation in lithography-free vanadium dioxide-dielectric-Weyl semimetal stack Opt. Commun. (IF 2.4) Pub Date : 2024-04-05 Yantong Shen, Liming Qian, Mengran Sun, Gaige Zheng
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Enhanced nonlinear optical properties for SWNT-PVA composite film by thermal treatment Opt. Commun. (IF 2.4) Pub Date : 2024-04-05 Cuihong Jin, Ruimin Jie, Yating Zhou, Yuchun Liu, Chenning Tao, Si Luo, Qiang Ling, Daru Chen, Yusheng Zhang, Yudong Cui
Single-walled carbon nanotube-polyvinyl alcohol (SWNT-PVA) composite film, which can be used as a saturable absorber, has exhibited an excellent nonlinear optical property, especially for ultrafast photonics application. However, the main issue is its low damage threshold, which can be attributed to the agglomeration phenomenon of carbon nanotube (CNT) and the thermal cumulation effect. Herein, we
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Gold cone-film composite nanostructure: A new structure for efficient excitation of the "lightning rod effect" of the tip Opt. Commun. (IF 2.4) Pub Date : 2024-04-05 Yu-Bo Guo, Jian Zhu, Guo-Jun Weng, Jian-Jun Li, Jun-Wu Zhao
Gold nanocones have attracted significant attention extensively for the "lightning rod effect" at the tip. In this study, we systematically investigated the plasmonic characteristics of the gold cone-film composite nanostructure and studied the “lighting rod effect” of the tip. It is discovered that by altering the distribution of the polarized charges, the nanofilm successfully affect the "lightning
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Fabrication of a 1×4 optical splitter by 3D printing and microfluidic abrasive micromachining Opt. Commun. (IF 2.4) Pub Date : 2024-04-04 Cheng Chen, Shaoqi Huang, Yan Long, Junyi Chen, Mingwei Zhao, Bo Dai, Dawei Zhang
3D printing has been widely used in the micromachining fields due to its flexibility in design and fabrication. However, due to the presence of undulations on the surface of the finished part, the 3D printing has hardly been employed in the optics manufacturing. In this study, we propose a manufacturing method for optical splitters based on 3D printing and microfluidic abrasive machining. We simulate
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Switchable and tunable terahertz metamaterial absorber based on graphene and VO2 resonator with ultra-broadband and multi-band absorption Opt. Commun. (IF 2.4) Pub Date : 2024-04-04 Masoud Hasankhani, Hamid Vahed, Mohammad Bemani
Vanadium dioxide (VO) and graphene have been combined to create new design possibilities for high-performance metamaterial devices, which offer an alluring foundation for electromagnetic absorption applications. The structure under investigation, which is based on patterned graphene-vanadium dioxide and metamaterial absorbers, is capable of achieving both broadband and multi-band absorption. Also,
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Optimization of tunable terahertz metamaterial absorber based on deep learning method Opt. Commun. (IF 2.4) Pub Date : 2024-04-04 Sheng Zhou, Yongxin Gai, Guoqiang Lan
We propose a tunable terahertz (THz) metamaterial absorber with a grating structure based on the phase transition characteristic of vanadium dioxide (VO). We use deep learning method to assist the design of THz metamaterial absorber and use finite-difference time domain (FDTD) method to simulate its absorptance. The results show that the phase transition of VO will cause the absorber to exhibit completely
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Monolayer actively tunable dual-frequency switch based on photosensitive silicon metamaterial Opt. Commun. (IF 2.4) Pub Date : 2024-04-04 Xianshun Cai, Zhongyin Xiao, Qi Zheng, Yulong Liu, Jingze Huang, Jiawei Zhu, Chaopeng Guo
We propose a monolayer actively tunable dual-frequency switch in the terahertz (THz) range based on photosensitive silicon (PSi) metamaterial. The designed unit cell consists of hollow cross-shaped slots and four L-shaped slots made of a perfect electric conductor (PEC), with PSi embedded in both the cross-shaped and four L-shaped slots of identical dimensions. The PEC serves as the dielectric substrate
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The preliminary measurements of water cloud microphysical properties using multiple scattering Raman lidar Opt. Commun. (IF 2.4) Pub Date : 2024-04-03 Liangliang Qi, Fan Yang, Jiandong Mao, Hu Zhao, Dengxin Hua
Clouds play an important role in the energy balance and water cycle for the Earth-Atmosphere system, and the accurate measurement of their macro-and microphysical properties is important for understanding atmospheric physical processes, studying aerosol-cloud interactions and improving numerical model parameterization schemes. In this paper, a multiple scattering Raman lidar system is developed, which
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Efficient noncollinear optical parametric chirped-pulse amplification in oversaturation region Opt. Commun. (IF 2.4) Pub Date : 2024-04-03 Zhixuan Hu, Jingui Ma
Optical parametric chirped pulse amplification (OPCPA) is the workhorse to generate intense ultrashort pulses across a broad wavelength range. Typically, OPCPA operates in the saturation region, but barely in the oversaturation region due to efficiency drop caused by back conversion. Through numerical simulations, we reveal the potential of noncollinear OPCPA to achieve significantly higher conversion
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Broadband electro-optic chaotic system using coupling mutual feedback for intensity and phase chaos generation Opt. Commun. (IF 2.4) Pub Date : 2024-04-03 Wei An, Lin Jiang, Lianshan Yan, Jiacheng Feng, Jihui Sun, Songsui Li, Anlin Yi, Wei Pan
An innovative dual-coupled dispersive electro-optic chaotic system utilizing two interlinked nonlinear feedback loops is introduced and demonstrated experimentally. This system efficiently converts phase chaos into intensity chaos while incorporating dispersion, achieved by integrating a broadband chirped fiber Bragg grating (CFBG) into a dual-loop opto-electronic oscillator (OEO) system. Consequently
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Improved evaluation model for macro-bending loss and power variation in single-mode fiber Opt. Commun. (IF 2.4) Pub Date : 2024-04-03 Shiyuan Zhao, Yang Liu, Lei Yang, Hao Xu, Yinan Shan, Zhanjun Wu
It is challenging to calculate the macro-bending loss of optical fiber when the bending radius is reduced to sub-millimeter levels, based on Marcuse's theory and its derivative theories. Furthermore, these theories are limited in their ability to assess the distribution and changes of the optical field within the fiber, focusing solely on the analysis of loss. To overcome these limitations, we proposed
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Reservoir computing system based on mutually delay-coupled semiconductor lasers with optical feedback Opt. Commun. (IF 2.4) Pub Date : 2024-04-03 Meiming You, Xuesong Yang, Dongchen Jiang, Guoqiang Wang
Reservoir Computing (RC), an evolution from Recurrent Neural Networks (RNN), not only represents a unique machine learning paradigm, but also serves as a neuromorphic framework that mirrors the intricate cortical circuits of the human brain. This paper proposes another new photonic RC system based on four basic photonic reservoir computing architectures (single photonic RC system, the parallel photonic
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The study of a Bragg grating based on hybrid plasmonic waveguides Opt. Commun. (IF 2.4) Pub Date : 2024-04-03 Zheyu Bi, Wenfeng Wang, Jiang Zhao, Kuang Peng, Jun Zhang
A Bragg grating based on a hybrid plasmonic waveguide (HPW) is proposed and investigated. This HPW's structure consists of an air gap sandwiched between a silicon waveguide and a silver grating with its reflective ridges towards the silicon waveguide. The width of the air gap varies periodically because of the ridges and grooves of the silver grating, which results in the periodical modulation of the
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Wavelength and angle-dependent third-harmonic generation in epsilon-near-zero indium tin oxide Opt. Commun. (IF 2.4) Pub Date : 2024-04-03 Jie Li, Jing Huang
Third-harmonic generation (THG) is a typical nonlinear optical phenomenon, which has important applications in the field of photoelectric integration. Here we reported the broadband and incident angle-dependent third-harmonic generation from a 350 nm thick indium tin oxide (ITO) film in near-infrared region, and a significant THG enhancement was observed. Moreover, the maximum third-harmonic conversion
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Graphene-based terahertz tunable double-broadband perfect absorber Opt. Commun. (IF 2.4) Pub Date : 2024-04-01 Maixia Fu, Zhonghao Liu, Yule Duan, Fei Zhou, Yinsheng Li
The rapid advancement of terahertz(THz) technology has sparked significant interest in exploring tunable broadband functional devices. In this study, we propose an antisymmetric graphene skeletonized structure to achieve a terahertz double-broadband perfect absorber. This absorber consists of a gold (Au) substrate, a TOPAS dielectric layer and C4 regular antisymmetric-patterned graphene embedded in
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Nanoparticle manipulation and sorting by phased modulated interference pattern of Gaussian Evanescent Waves Opt. Commun. (IF 2.4) Pub Date : 2024-04-01 Şeyma Arslanyürek, Mehmet Salih Dinleyici
The utilization of Gaussian Evanescent Waves (GEWs) in particle manipulation provides a three-dimensional force distribution that is significantly high at the vicinity of the surface and exponentially decreases as one moves away, hence enabling 3D particle manipulation, unlike plane waves. By coherently interfering four GEWs in various phase combinations, symmetric evanescent field distributions can
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Multifunctional dual stimuli-triggered metadevice in terahertz regime Opt. Commun. (IF 2.4) Pub Date : 2024-04-01 Ting Liang, Guibin Li, Ziyang Wang, Jingling Shen, Bo Zhang
Multifunctional metadevices have garnered substantial attention because of their optical characteristics for operation within the terahertz regime. However, metasurfaces have unalterable geometrical configurations that represent a limitation in this context, thus necessitating dynamic adjustability of the structures. In this study, a development strategy is used that involves a dual stimuli-responsive
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Polarization characteristic parameters measurement of Y-waveguide multifunction integrated optic circuit based on noise reduction processing Opt. Commun. (IF 2.4) Pub Date : 2024-04-01 Hongxia Zhang, Jinghui Hou, Tianyue Li, Guoqiang Wen, Dagong Jia, Tiegen Liu
The polarization characteristics of the lithium niobate multifunction integrated optic circuit (MIOC), including its polarization extinction ratio (PER) and pigtail crosstalk, have a significant impact on the accuracy of fiber optic gyroscopes. A distributed polarization coupling (DPC) MIOC polarization parameter measurement method based on noise reduction processing is proposed. The proposed method
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Compact and broadband 2×2 3 dB optical power splitter based on bricked subwavelength gratings Opt. Commun. (IF 2.4) Pub Date : 2024-03-31 Mengjia Lu, Yu Sun, Dongyu Wang, Wei Cheng, Shangqing Shi, Jin Wang, Yifei Chen, Chen Guo, Tong Lin, Guohua Hu, Binfeng Yun, Yiping Cui
We design and experimentally demonstrate a compact and broadband 2 × 2 3 dB optical power splitter engineered by bricked subwavelength gratings (BSWG). In this work, 3D finite difference time domain (FDTD) and particle swarm optimization (PSO) methods are combined to optimize the power splitter. The simulation results show that the coupling length is 6.11 μm, the excess loss (EL) is lower than 0.6 dB
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Orthoscopic integral imaging for different lenslet arrays in real and virtual fields Opt. Commun. (IF 2.4) Pub Date : 2024-03-31 Wei Wu, Cheng Zhong, Shigang Wang, Minghao Han
In the future, various types and parameters of display devices and lenslet arrays will be commercially available. Different display devices can be matched by cutting and expanding elemental images, while different lenses require changing the pixel mapping structure individually for each pixel, which involves complex calculations. A simple pseudoscopic-to-orthoscopic conversion for lenslet arrays with
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Theoretical and experimental investigation on the gain filtering effect in the high-power fiber oscillator using confined-doped fiber Opt. Commun. (IF 2.4) Pub Date : 2024-03-31 Haobo Li, Hanshuo Wu, Ruixian Li, Liangjin Huang, Hu Xiao, Huan Yang, Zhiping Yan, Zhiyong Pan, Pu Zhou
In this work, a confined-doped fiber oscillator model considering the spatial hole-burning effect is established to help understand the underlying physical mechanism of the gain filtering effect. The influences of the relative doping ratio on the gain filtering effect are systematically analyzed in a fiber oscillator under different power levels, which reveals the possibility of achieving near pure
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Ultra-broadband MMI power splitter from 1.26 to 1.67 μm with photonic bound states in the continuum Opt. Commun. (IF 2.4) Pub Date : 2024-03-30 Chen Zhang, Weixi Lin, Xiaomin Nie, Lei Wang, Zhenmin Chen, Chunyang Ma
Photonic bound states in the continuum (BIC) have excellent effects in localizing light fields. Low propagation loss of TM mode has been achieved in different orders of BICs on an etchless lithium niobate (LiNbO) platform. Herein, we simulatively demonstrate a 1 × 2 MMI (Multimode interference) power splitter based on waveguides constructed by low-refractive-index structure (ZEP-520A) on a high-refractive-index
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Optical design of Fery imaging spectrometer with large working distance and long slit length Opt. Commun. (IF 2.4) Pub Date : 2024-03-30 Xiaoying He, Yacan Li, Lei Feng, Jinsong Zhou, Juanjuan Jing, Boyang Nie, Lei Yang
This article demonstrates a imaging spectrometer using Fery prism with large working distance and long slit length. Two spherical lenses are inserted between the double-convex lens and the Fery prism to enlarge the clearance distance. Using this method, an imaging spectrometer with a 37.2° field of view and F# 2.2 is designed, and the measured spectrum ranges from 400 nm to 900 nm. The performance
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Asymptotic capacity maximization for MISO visible light communications with mirror array-based RISs on walls and an LC RIS-based receiver Opt. Commun. (IF 2.4) Pub Date : 2024-03-30 Qi Wu, Jian Zhang, Yan-Yu Zhang, Gang Xin
Traditional adoptions of reconfigurable intelligent surfaces (RISs) in visible light communications (VLCs) mainly focus on one kind of RIS. However, the joint application of mirror array-based RIS and a liquid crystal (LC)-based RIS in multiple-input single-output (MISO) VLC has not been investigated in prior works. Considering the huge potential to improve the communication performance provided by
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Design and analysis of a highly uniform five-band terahertz filter based on frequency selective surface Opt. Commun. (IF 2.4) Pub Date : 2024-03-30 Wu Pan, Shengjian Hu, Zhen Zhang, Ziheng Zhu, Mingsen Tan
In this paper, a highly uniform five-band terahertz filter is presented, achieved by deforming two nested square ring structures. The metal pattern layer of the filter comprises a nested square ring structure with an inner and outer opening, and a metal strip connecting the inner and outer rings. Symmetrical openings divide nested square rings, breaking the current path and generating multiple metal
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Photonics-based wideband multi-format tunable radar jamming signal generator Opt. Commun. (IF 2.4) Pub Date : 2024-03-29 Dongjuan Shan, Aijun Wen, Yuan Men, Changchang Chen
A photonics-based radar jamming signal generator is proposed in this paper. By adjusting a polarization controller, interrupted-sampling repeater jamming (ISRJ), comb spectrum modulation jamming (CSMJ), ISRJ and CSMJ composite jamming can be respectively generated after photoelectric conversion. We have experimentally verified the generation of ISRJ signals with duty cycles of 50% and 25%, the generation
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Design of an ultra wideband THz reflectarray antenna based on orbital angular momentum Opt. Commun. (IF 2.4) Pub Date : 2024-03-29 Yihang Li, Xuehong Sun, Liping Liu
A Reflectarray antenna (RA) that can generate orbital angular momentum vortex waves in the THz band was proposed. First of all, a reflective phase-shifting element composed of a notched double-shaped ring and a single Matal structure was designed to form a radiation patch. The reflective phase-shifting element has the advantages of good linearity, high smoothness, and a large phase shift range, which