Results 81 to 90 of about 2,156,515 (239)

25-GHz-Spaced DWDM-PON With Mitigated Rayleigh Backscattering and Back-Reflection Effects

IEEE Photonics Journal, 2013
A novel 25-GHz-spaced dense wavelength-division multiplexing passive optical network (DWDM-PON) is proposed to improve the utilization of wavelength resource and mitigate the Rayleigh backscattering (RB) and back-reflection effects.
Zhao Zhou, Shilin Xiao, Tao Qi, Pingqing Li, Meihua Bi, Weisheng Hu   +5 more
doaj   +1 more source

From Sensing Mechanisms to System Co‐Design: Graphene‐Based Sensors and Readout Circuits

Advanced Science, EarlyView.
This review establishes a unified PS–EQ–RF framework linking graphene sensing mechanisms, native electrical outputs, and output‐specific readout circuits. Voltage‐, current‐, resistance‐, and capacitance‐type sensing systems are systematically classified to guide architecture selection, low‐noise design, system co‐design, and practical integration ...
Jinduo Zhang, Meng Chen, Guanchen Li, Ruifeng Liu, Yingxin Wang, Ziran Zhao   +5 more
wiley   +1 more source

Wavelength Assignment in Hybrid Quantum-Classical Networks

Scientific Reports, 2018
Optimal wavelength assignment in dense-wavelength-division-multiplexing (DWDM) systems that integrate both quantum and classical channels is studied. In such systems, weak quantum key distribution (QKD) signals travel alongside intense classical signals ...
Sima Bahrani, Mohsen Razavi, Jawad A. Salehi   +2 more
doaj   +1 more source

Chemotherapy‐Activated GSK3β‐DNMT1 Signaling Upregulates CD47 to Evade Macrophage Phagocytosis and Drive Temozolomide Resistance in Glioblastoma

Advanced Science, EarlyView.
Temozolomide treatment activates GSK3β, driving DNMT1 phosphorylation, destabilization, and CD47 promoter hypomethylation in glioblastoma. This epigenetic shift upregulates CD47, enabling TMZ‐treated GBM cells to evade macrophage phagocytosis, survive chemotherapy, and acquire resistance.
Jie Li, Shuai Ying, Yi Zhang, Jingjing Wang, Quan Wan, Lingli Gong, Daxing Xu, Zhenkun Yang, Hongnian Lu, Ying Yin, Xiangming Fang, Zhening Pu   +11 more
wiley   +1 more source

Experimental Demonstration of π Equivalent Phase-Shifted SBG Laser With Controlled Distributed Phase Shift

IEEE Photonics Journal, 2019
We designed and fabricated a π equivalent phase-shifted sampled Bragg grating (SBG) semiconductor laser with a controlled distributed phase shift. The phase shift is equivalently realized with reconstruction-equivalent-chirp (REC) technique.
Rulei Xiao, Runze Liu, Yating Zhou, Zhenxing Sun, Jun Lu, Yuechun Shi, Xiangfei Chen   +6 more
doaj   +1 more source

Comparison of peristrophic multiplexing and a combination of angular and peristrophic holographic multiplexing in a thick PVA/acrylamide photopolymer for data storage [PDF]

, 2007
Two different types of multiplexing are used to store 90 holograms at the same location in a polyvinyl alcoholacrylamide photopolymer material. In the first, the 90 holograms are stored using only peristrophic multiplexing, whereas in the second a ...
Ortuño, Manuel, Gallego, Sergi, Beléndez, Augusto, García Llopis, Celia, Fernandez-Varo, Helena, Pascual, Inmaculada   +5 more
core   +1 more source

Helicobacter pylori‐Induced Persistent IGF2BP1 Activation Promotes Ferroptosis Resistance in Gastric Tumorigenesis

Advanced Science, EarlyView.
Helicobacter pylori infection induces sustained upregulation of the RNA‐binding protein IGF2BP1 in gastric epithelial cells, establishing a persistent epitranscriptomic program. IGF2BP1 stabilizes SLC7A11 mRNA in an m6A‐dependent manner to suppress ferroptosis and promote epithelial survival under oxidative stress. Pharmacological inhibition of IGF2BP1
Jing Ning, Xin Guan, Xinyu Hao, Jing Zhang, Deyao Li, Ying Xiong, Wenlin Zhang, Xiurui Han, Yanfei Lang, Meiling Zhou, Mengjie Yang, Zhi Huang, Tinghui Qu, Ming Zu, Qiao Meng, Weiwei Fu, Fengmin Lu, Jing Zhang, Xiangmei Chen, Tong Liu, Shigang Ding   +20 more
wiley   +1 more source

Photonic Crystal Based 2/3/6- Way Optical Splitter and Demultiplexer

Frontiers in Physics, 2019
We present 2-, 3-, and 6-way optical demultiplexer and optical filters based on coupled waveguide and photonic crystal cavities. Demultiplexers with 3 nm channel separation and optical splitters with different transmission efficiencies are presented. The
Richa Goyal, Richa Goyal, Banoj Kumar Nayak, Ashwin Tulapurkar, Venu Gopal Achanta   +4 more
doaj   +1 more source

Greater than 90nm continuously wavelength-tunable fibre Bragg gratings

, 2003
We report silica-based fibre Bragg grating filters with wavelength tuning-spans well over 90nm using a simple set-and-forget beam bending tuning-package.
Butler, S.A., M. Mokhtar, Kikuchi, K., M. Ibsen, Mokhtar, M.R., Goh, C.S., Ibsen, M., C. Goh, S. Set, S. Butler, Set, S.Y., K. Kikuchi   +11 more
core   +1 more source

Characterisation of ultra-narrow band filters for diode laser systems based on dense wavelength division multiplexing

, 2022
S.15-16We present a measurement platform to characterise combining elements used for dense wavelength division multiplexing, such as dielectric edge filters or Volume Bragg Gratings (notch filters).
Traub, M., Hoffmann, D., Rubel, D., Witte, U., Hengesbach, S.   +4 more
core   +1 more source