Results 11 to 20 of about 108,524 (324)

Integrated Free-Space Optics and Fiber Optic Network Performance Enhancement for Sustaining 5G High Capacity Communications

International Journal of Optics, 2023
In this paper, the integrated free-space optics (FSO) and fiber optic model is evaluated using new radio (NR) sub-THz link to sustain next generation 5G capacity.
Meshari Alsharari, Khaled Aliqab, Farman Ali, Ammar Armghan   +3 more
semanticscholar   +1 more source

Energy Transfer and Cross-Relaxation Induced Efficient 2.78 μm Emission in Er³⁺/Tm³⁺: PbF₂ mid-Infrared Laser Crystal

Crystals, 2021
An efficient enhancement of 2.78 μm emission from the transition of Er3+: 4I11/2 → 4I13/2 by Tm3+ introduction in the Er/Tm: PbF2 crystal was grown by the Bridgman technique for the first time. The spectroscopic properties, energy transfer mechanism, and
Jiayu Liao, Qiudi Chen, Xiaochen Niu, Peixiong Zhang, Huiyu Tan, Fengkai Ma, Zhen Li, Siqi Zhu, Yin Hang, Qiguo Yang, Zhenqiang Chen   +10 more
doaj   +1 more source

Dosimeter Based on YAG: Ce Phosphor via Sol-Gel Method for Online X-ray Radiation Monitoring

Crystals, 2021
This paper focuses on the preparation of cerium-doped yttrium aluminum garnet (YAG: Ce) powder with several concentration gradients via the sol-gel method by detecting its structural characteristics via X-ray diffraction (XRD) patterns and scanning ...
Yuheng Yan, Changfeng Zhang, Luchuan Zheng, Taiqi Wang, Mao Li, Feiyang Xie, Qiang Guo, Gangding Peng   +7 more
doaj   +1 more source

Localization of seismic waves with submarine fiber optics using polarization-only measurements

Communications Engineer, 2023
Monitoring seismic activity on the ocean floor is a critical yet challenging task, largely due to the difficulties of physical deployment and maintenance of sensors in these remote areas.
Luis Costa, Siddharth Varughese, Pierre Mertz, V. Kamalov, Zhongwen Zhan   +4 more
semanticscholar   +1 more source

Co-Doping Effect of Bismuth Ions on the Gain Characteristics of Er-Doped Silica Optical Fiber

IEEE Photonics Journal, 2022
By examining the spectral and amplification characteristics of Er-doped silica fiber (EDSF) and Bi/Er co-doped silica fiber (BEDSF), an active doped silica fiber with broadband- and flat-gain is investigated.
Zexin Zheng, Xiangping Pan, Weizhu Ji, Yanhua Dong, Jianxiang Wen, Wei Chen, Sujuan Huang, Gangding Peng, Ting-Yun Wang   +8 more
doaj   +1 more source

Empowering high-dimensional optical fiber communications with integrated photonic processors [PDF]

Nature Communications, 2023
Mode-division multiplexing (MDM) in optical fibers enables multichannel capabilities for various applications, including data transmission, quantum networks, imaging, and sensing.
Kaihang Lu, Zengqi Chen, Hao Chen, Wu Zhou, Zunyue Zhang, Hon Ki Tsang, Y. Tong   +6 more
semanticscholar   +1 more source

Reinforcement Learning Environment for Wavefront Sensorless Adaptive Optics in Single-Mode Fiber Coupled Optical Satellite Communications Downlinks

Photonics, 2023
Optical satellite communications (OSC) downlinks can support much higher bandwidths than radio-frequency channels. However, atmospheric turbulence degrades the optical beam wavefront, leading to reduced data transfer rates.
Payam Parvizi, Runnan Zou, Colin Bellinger, R. Cheriton, Davide Spinello   +4 more
semanticscholar   +1 more source

The influence of gamma radiation on polarization mode dispersion of fibers applied in communications [PDF]

Nuclear Technology and Radiation Protection, 2012
The fiber optics technology is constantly being developed, and is becoming an essential component of contemporary communications, medicine and industry.
Sekulić Rade S., Slavković Nikola M., Srećković Milesa Ž., Kovačević Milojko S., Stamenović Miljan S.   +4 more
doaj   +1 more source

Hybrid POF/VLC Links Based on a Single LED for Indoor Communications

Photonics, 2021
A hybrid fiber/wireless link based on a single visible LED and free of opto-electronic intermediate conversion stages has been demonstrated for indoor communications.
Juan Andrés Apolo, Beatriz Ortega, Vicenç Almenar   +2 more
doaj   +1 more source

Ppb-level gas detection using on-beam quartz-enhanced photoacoustic spectroscopy based on a 28 kHz tuning fork

Photoacoustics, 2022
In this paper, an on-beam quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a custom quartz tuning fork (QTF) acting as a photoacoustic transducer, was realized and tested. The QTF is characterized by a resonance frequency of 28 kHz, ~15%
Haoyang Lin, Huadan Zheng, Baiyang Antonio Zhou Montano, Hongpeng Wu, Marilena Giglio, Angelo Sampaolo, Pietro Patimisco, Wenguo Zhu, Yongchun Zhong, Lei Dong, Ruifeng Kan, Jianhui Yu, Vincenzo Spagnolo   +12 more
doaj   +1 more source