Design of a Ka-band Wideband Multibeam Phased Array by GUAN Jin, SUN Jie, XING Chen, LIAO Yi, LI Yi

“…The sub-array post-stage adopts the Optical True Time Delay (OTTD) method based on optical switching, high-precision optical fiber delay line and wavelength division multiplexing to realize multi-channel delay and multi-beam synthesis of the sub-array stage.…”
Get full text

Nonlinear dynamics of the additive-pulse modelocked laser by E. J. Mozdy, C. R. Pollock

“…We have modeled the additive-pulse modelocked (APM) laser with a set of four nonlinear difference equations, that describe the transit of optical pulses through the main cavity and through an external cavity containing a single-mode optical fiber. …”
Get full text

Contrast of Image of an Object Observed in Smoke Conditions using Polarizing Filtering of Radiation Scattered by Smoke Particles by A. I. Kitsak

“…Prospects for developing optical accessories for firefighters to improve the observation of objects in smoke were evaluated by comparing image contrasts.The goal was achieved by experimentally simulating the process of transmitting images of a blackandwhite object with a sharp black/white transition boundary through various types of smoke aerosols using polarizing filtering of radiation scattered by smoke particles, and without filtering and evaluating image contrasts.Studies of image contrasts for different optical densities of smoke in two registration schemes were performed, when the receiving optical system is located near the illumination source of the object at a distance of ≈ 150 mm from it, and when it is located at a distance from the illumination source of the object at a distance of ≈ 800 mm.It is established that the method of forming the image of the object using polarization filtering of radiation backscattering (RBS) reduces the rate of image contrast reduction with an increase in optical smoke density compared to image registration without filtering (RBS).A significant difference in the contrasts of images recorded with filtration (RBS) and in the absence of it is observed for "light" fumes (smoldering of wood, cotton) at average optical densities of smoke.The results obtained can be used in the development of optical accessories for firefighter-rescuer to improve the conditions of observation of objects in adverse conditions of vision: smoke, vaporization, fog.…”
Get full text

Deep learning-based automated segmentation for the quantitative diagnosis of cerebral small vessel disease via multisequence MRI by Huiyu Zhao, Miaoyi Zhang, Weijun Tang, Luyuan Jin, Jie Tang, Langfeng Shi, Xiao Deng, Jianhui Fu, Weiwen Zou

Get full text

Electronic Information Signal Recognition Based on a Stochastic Neural Network Algorithm by Jiaye Wang

“…In order to improve the recognition accuracy of SCN for optical fiber data, a method of optical fiber intrusion signal recognition based on SCN (TSVD-SCN) based on truncated singular value decomposition (TSVD) is proposed in this paper. …”
Get full text

Unsupervised Video Anomaly Detection Using Video Vision Transformer and Adversarial Training by Shimpei Kobayashi, Akiyoshi Hizukuri, Ryohei Nakayama

“…Consequently, this study aims to develop an unsupervised anomaly detection method for surveillance videos based on the prediction of future frame and optical flow magnitude using adversarial networks. …”
Get full text

Zinc Oxide Nanoparticles for Revolutionizing Agriculture: Synthesis and Applications by Sidra Sabir, Muhammad Arshad, Sunbal Khalil Chaudhari

“…As far as method of formation is concerned, ZnO NPs can be synthesized by several chemical methods such as precipitation method, vapor transport method, and hydrothermal process. …”
Get full text

Space-Time Correlation for Three-Dimensional MIMO Channel Model Using Leaky Coaxial Cables in Rectangular Tunnel by Kai Zhang, Fangqi Zhang, Guoxin Zheng

Get full text

5G NR sub-THz fiber-wireless integrated systems using polarization multiplexing-multiband technique and self-polarization diversity scheme by Ming-Chung Cheng, Hai-Han Lu, Hsiao-Mei Lin, Stotaw Talbachew Hayle, Xu-Hong Huang, Wei-Wen Hsu, Yu-Chen Chung, Yu-Yao Bai, Kelper Okram, Jia-Ming Lu

“…Polarization multiplexing-multiband technique is an effectual method to enhance the transmission capacity and spectral efficiency of systems. …”
Get full text

Beacon Jointed Packet Reconstruction Scheme for Mobile-Phone Based Visible Light Communications Using Rolling Shutter by Wei-Chung Wang, Chi-Wai Chow, Chia-Wei Chen, Hsiang-Chain Hsieh, Yen-Ting Chen

“…Mobile-phone based visible light communication (VLC) is an attractive method for optical wireless communication. However, the data rate is typically limited by the complementary metal–oxide–semiconductor image sensor frame rate and the processing time gap in the rolling shutter mode operation. …”
Get full text

THERMAL LENSING MEASUREMENTS IN THE ANISOTROPIC LASER CRYSTALS UNDER DIODE PUMPING by P. A. Loiko, V. G. Savitski, K. V. Yumashev, N. V. Kuleshov, A. A. Pavlyuk

“…These dependencies are fitted using the ABCD matrix method in order to obtain the sensitivity factors showing the change of the optical power of thermal lens due to variation of the pump intensity. …”
Get full text

In-Line Sputtered Gallium and Aluminum Codoped Zinc Oxide Films for Organic Solar Cells by Shang-Chou Chang

“…In-line sputtering demonstrates a potential method with simplicity, mass production, and large-area deposition to produce GAZO films with good electrical and optical quality. …”
Get full text

Highly compact circulators in square-lattice photonic crystal waveguides. by Xin Jin, Zhengbiao Ouyang, Qiong Wang, Mi Lin, Guohua Wen, Jingjing Wang

“…By applying the finite-element method together with the Nelder-Mead optimization method, an extremely low insertion loss of 0.02 dB for the transmitted wave and ultra high isolation of 46 dB∼48 dB for the isolated port are obtained. …”
Get full text

Process tensor approaches to modeling two-dimensional spectroscopy by Roosmarijn de Wit, Jonathan Keeling, Brendon W. Lovett, Alex W. Chin

“…Here we present a numerical method to model optical spectra of non-Markovian open quantum systems. …”
Get full text

Complete Electric Field Characterization of Ultrashort Multicolor Pulses by Maximilian Kubullek, Miguel A. Silva-Toledo, Roland E. Mainz, Fabian Scheiba, Rafael de Q. Garcia, Felix Ritzkowsky, Giulio Maria Rossi, Franz X. Kärtner

“…Here, we introduce the TREX (third-order reconstruction of electric fields via cross(X)-correlation) method, which allows the all-optical, in situ characterization of the complete electric fields of 2 broadband pulses with different central wavelengths. …”
Get full text

Growth kinetics and mechanical characterization of boride layers formed on Ti6Al4V by Özger Onur Yiğit, Avcı Şenol

“…This present study focuses on the characterization of the boride layer formed on Ti6Al4V alloy borided at 950, 1,050, and 1,150°C for 5 and 15 h using two different recipes (M-1 and M-2). In addition, the activation energies of boron diffusion calculated using the TiB2 layer thicknesses measured from optical images of all samples, including 10 h borided samples, are included in the article.…”
Get full text

Experimental Investigation on Radiation Characteristic of Nanofluids by He Qinbo, Wang Shuangfeng, Zeng Shequan, Zheng Zhaozhi

“…In this article, Cu-H2O, Co-H2O, MWCNT-H2O nanofluids were prepared through two-step method. The transmittance of nanofluids over solar spectrum (250 to 2500nm) was measured by the UV-Vis-NIR spectrophotometer based on integrating sphere principle. …”
Get full text

Lens Raster as a Source of Distortions in Integral Photography by E. G. Zaytseva, A. A. Kisliuk, T. O. Laryonova, N. N. Dubina

“…Analysis of methods for recording and reproducing a three-dimensional image allows to distinguish two different approaches. …”
Get full text

Dual-step photo-induced self-assembled hydrogel for endogenous oral mucosal wound healing by Shaojun Fang, Qiangqiang Zhou, Mengqi Zhou, Changyi Li, Huaxing Xu, Hongyu Tang, Wanlu Zhang, Ruiqian Guo, Xiaoling Wei, Rongjun Zhang

Get full text

Tunable Plasmon-Induced Transparency in Dual Hexagonal Resonators With Rotatable Embedded Bar by Yichen Ye, Yiyuan Xie, Tingting Song, Bocheng Liu, Junxiong Chai, Liangyi Zhang, Yunchao Zhu, Yong Liu

“…The proposed structure is numerically investigated by finite-difference time-domain (FDTD) method. The numerical simulation results reveal that by rotating the embedded bar to different angles, PIT can realize in different wavelengths. …”
Get full text