Results 21 to 30 of about 41,308 (266)

Recent progress of dynamic mode manipulation via acousto-optic interactions in few-mode fiber lasers: mechanism, device and applications

Nanophotonics, 2020
The burgeoning advances of spatial mode conversion in few-mode fibers emerge as the investigative hotspot in novel structured light manipulation, in that, high-order modes possess a novel fundamental signature of various intensity profiles and unique ...
Lu Jiafeng, Shi Fan, Xu Jiangtao, Meng Linghao, Zhang Longkun, Cheng Peikang, Zhou Xuan, Pang Fufei, Zeng Xianglong   +8 more
doaj   +1 more source

Link-Blockage Model and AP-Placement Scheme for No-Blockage Link between AGV and AP in Logistics–Warehousing VLC Network

Photonics, 2022
In this paper, the blockage problem of the optical link between AGV (autonomous ground vehicles) and AP (access point) in the logistics–warehousing VLC (visible light communication) network is analyzed.
Guiyu Gong, Chaoqin Gan, Yong Fang, Yifan Zhu, Qiuyue Hu   +4 more
doaj   +1 more source

Nanomechanical optical fiber [PDF]

Optics Express, 2012
Optical fibers are an excellent transmission medium for light and underpin the infrastructure of the Internet, but generally after fabrication their optical properties cannot be easily modified. Here, we explore the concept of nanomechanical optical fibers where, in addition to the fiber transmission capability, the internal core structure of the fiber
Lian, Zhenggang, Horak, Peter, Feng, Xian, Xiao, Limin, Frampton, Ken, White, Nicholas, Tucknott, John A., Rutt, Harvey, Payne, David N., Stewart, Will, Loh, Wei H.   +10 more
openaire   +3 more sources

Microfiber evanescent-field photothermal gas detection using acoustic-induced mode-dependent frequency shift

Nanophotonics, 2023
In this study, we experimentally showcase the microfiber evanescent-field photothermal gas detection by exploiting all-fiber MHz-level frequency shift scheme. Based on the acousto-optic interaction effect, the low-frequency shifts of 0.9 MHz and 1.83 MHz
Zhu Yi, Guo Anbo, Xu Jiangtao, Zhang Zhengwei, Pang Fufei, Zhang Weijian, Zeng Xianglong, Sun Jianfeng   +7 more
doaj   +1 more source

Generation, Transmission, and Amplification of OAM Modes in the PbSe-Doped Ring-Core Fiber Carrying 3D Printed Spiral Phase Plate

Photonics, 2022
Vortex beams carrying orbital angular momentum (OAM) have increasingly attracted attention in the field of optical communication. However, transmission is still an issue due to transmission loss, especially in optical fibers.
Yana Shang, Huimei Wei, Hengfei Guo, Na Chen, Zhenyi Chen, Heming Wei, Kemin Wang, Yanhua Dong, Fufei Pang, Tingyun Wang   +9 more
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Spatial Spectral Characteristics of Partial Discharge with Different Electrode Models

Photonics, 2023
In this paper, the spatial spectral characteristics of partial discharge (PD) under different electrode models are mainly studied. In the initial corona discharge stage, the emission spectrum is mainly emitted by the N2(C3IIu→B3IIg) energy level ...
Taiqi Wang, Yongkang Cheng, Chao Xu, Haoyu Li, Jiayao Cheng, Gangding Peng, Qiang Guo   +6 more
doaj   +1 more source

Silicon optical Fiber

Optics Express, 2008
Described herein are initial experimental details and properties of a silicon core, silica glass-clad optical fiber fabricated using conventional optical fiber draw methods. Such semiconductor core fibers have potential to greatly influence the fields of nonlinear fiber optics, infrared and THz power delivery.
J, Ballato, T, Hawkins, P, Foy, R, Stolen, B, Kokuoz, M, Ellison, C, McMillen, J, Reppert, A M, Rao, M, Daw, S R, Sharma, R, Shori, O, Stafsudd, R R, Rice, D R, Powers   +14 more
openaire   +2 more sources

Polarization Modulation Instability in Dispersion-Engineered Photonic Crystal Fibers

Crystals, 2021
Generation of widely spaced polarization modulation instability (PMI) sidebands in a wide collection of photonic crystal fibers (PCF), including liquid-filled PCFs, is reported. The contribution of chromatic dispersion and birefringence to the net linear
Abraham Loredo-Trejo, Antonio Díez, Enrique Silvestre, Miguel V. Andrés   +3 more
doaj   +1 more source

Recent Advances in Phase-Sensitive Optical Time Domain Reflectometry (Ф-OTDR)

Photonic Sensors, 2021
Phase-sensitive optical time domain reflectometry (Ф-OTDR) is an effective way to detect vibrations and acoustic waves with high sensitivity, by interrogating coherent Rayleigh backscattering light in sensing fiber. In particular, fiber-optic distributed
Yunjiang Rao, Zinan Wang, Huijuan Wu, Zengling Ran, Bing Han   +4 more
doaj   +1 more source

Hierarchical Attention Neural Network for Event Types to Improve Event Detection

Sensors, 2022
Event detection is an important task in the field of natural language processing, which aims to detect trigger words in a sentence and classify them into specific event types.
Yanliang Jin, Jinjin Ye, Liquan Shen, Yong Xiong, Lele Fan, Qingfu Zang   +5 more
doaj   +1 more source