Results 91 to 100 of about 461,573 (294)

Received optical power calculations for optical communications link performance analysis [PDF]

The factors affecting optical communication link performance differ substantially from those at microwave frequencies, due to the drastically differing technologies, modulation formats, and effects of quantum noise in optical communications.
Burk, B. D., Marshall, W. K.
core   +1 more source

Quantum Cryptography

, 1995
Quantum cryptography is a new method for secret communications offering the ultimate security assurance of the inviolability of a Law of Nature.
Bell J. S., Brassard G., Busch P., Clauser J. F., Conan Doyle A., D. M. Alde, Deutsch D., G. G. Luther, G. L. Morgan, Hayes B., Hodges A., Hughes R. I. G., Kahn D., Knuth D. E., Lamphere R. J., M. Schauer, P. Dyer, Richard J. Hughes, Schneier B., Schroeder M. R., Shannon C. E., Shor P. W., Simmons G. J., Vernam G. S., von Neumann J., von Neumann J., Walker N. G., Welsh D., Williams R. C., Wright P., Wrixon F. B.   +30 more
core   +1 more source

Optoelectronically Active GaAs/GeSn‐MQW/Ge Heterojunctions Created via Semiconductor Grafting

Advanced Optical Materials, EarlyView.
Semiconductor Grafting enables a lattice‐mismatched GaAs/GeSn‐MQW/Ge heterojunction with engineered band offsets and optical field distribution. The enlarged conduction and valence band discontinuities govern asymmetric carrier transport, producing bias‐dependent dual‐mode photodetection from visible to near‐infrared wavelengths.
Jie Zhou, Haibo Wang, Yang Liu, Yifu Guo, Alireza Abrand, Yiran Li, Jiarui Gong, Hieu D. Trinh, Po Rei Huang, Jianping Shen, Shengqiang Xu, Daniel Vincent, Samuel Haessly, Yi Lu, Munho Kim, Shui‐Qing Yu, Parsian K. Mohseni, Guo‐En Chang, Zetian Mi, Kai Sun, Xiao Gong, Mikhail A. Kats, Zhenqiang Ma   +22 more
wiley   +1 more source

Optical Communication

Himalayan Physics, 2011
The idea of this chapter is to give an overview on optical communication systems. The most important devices for fiber-optic transmission systems are presented, and their properties discussed. In particular, we consider such systems working with those basic components which are necessary to explain the principle of operation.
Otto Strobel, Daniel Seibl, Jan Lubkoll
openaire   +3 more sources

Dynamic microvascular monitoring with miniaturized omnidirectional broadband photoacoustic imaging system for living entities (MOBILE)

Nature Communications
Microcirculation monitoring is crucial for evaluating cardiovascular health and detecting organ dysfunction early, but existing bedside imaging techniques often cannot provide sufficient resolution and depth for dynamic assessment during natural ...
Wei Li, Xue Bai, Yizhi Liang, Peiqian He, Yachao Zhang, Qi Zhang, Zixuan Zhang, Chaoneng Wu, Changze Song, Shirong Li, Yejing Zheng, Zhixuan Hu, Xiaoxuan Zhong, Linghao Cheng, Long Jin, Bai-Ou Guan   +15 more
doaj   +1 more source

Substituent Effects on Cyanine Dyes Vary with Position and Chain Length

Advanced Optical Materials, EarlyView.
In cyanines, substituent effects vary as a function of substituent position and cyanine length. Electron‐donating‐ and ‐withdrawing groups at meso‐ and α‐positions of 4n+1/4n−1 long cyanines (n = 1, 2, 3…) cause opposing, hypsochromic and bathochromic shifts of the 1st UV–vis absorption bands.
David Dunlop, Rebecca Strada, Peter Šebej   +2 more
wiley   +1 more source

Integrated Multifrequency Recognition and Downconversion Based on Photonics-Assisted Compressive Sampling

IEEE Photonics Journal, 2012
On the basis of photonics-assisted compressive sampling (CS), we demonstrate for the first time an integrated system with the capacity of multifrequency recognition and downconversion of intercepted radio frequency (RF) component.
Li Yan, Yitang Dai, Kun Xu, Jian Wu, Yan Li, Yuefeng Ji, Jintong Lin   +6 more
doaj   +1 more source

The Evolution of Laser‐Induced Damage Patterns in Polymer Stabilized Liquid Crystals: Insights From Morphological Characterization and Thermo‐Driven Simulations

Advanced Optical Materials, EarlyView.
A dual‐domain PSLC architecture enables direct comparison of alignment‐dependent laser damage within a single device. Crack‐like and seal‐like morphologies emerge under different damage conditions, and their evolution is interpreted through quantitative image analysis and heat‐driven simulations.
Dengcheng Chen, Zoey S. Davidson, Brian P. Radka, Selim Elhadj, Liang‐Chy Chien   +4 more
wiley   +1 more source

Hybrid Optical Wireless Network for Future SAGO-Integrated Communication Based on FSO/VLC Heterogeneous Interconnection

IEEE Photonics Journal, 2017
Free-space optics (FSO) and visible light communication (VLC) share the same optical wireless features, such as high data rate, license free, energy efficient, flexible access, and high degree of security.
Zhitong Huang, Zhenfang Wang, Minglei Huang, Wei Li, Tong Lin, Peixuan He, Yuefeng Ji   +6 more
doaj   +1 more source

Insights Into Degradation Pathways of Perovskite Thin Films under Outdoor and Indoor Conditions: A Comparative Analysis

Advanced Optical Materials, EarlyView.
This study compares indoor low‐light and outdoor high‐light degradation in perovskite thin films. Under ∼1000 lux [N2], films remain stable; in oxygen, the same low light triggers strain, surface oxidation, and shorter lifetimes. Whereas high light accelerates decomposition to PbI2 and metallic oxides.
Muhammad Bilal, Madsar Hameed, Femi Igbari, Jing Li, Rajveer Singh Rajaura, Richard Whiteley, Guixiang Li, Joe Briscoe, Meng Li, Zhe Li   +9 more
wiley   +1 more source