Results 71 to 80 of about 316,392 (313)

Learning diffractive optical communication around arbitrary opaque occlusions

Nature Communications, 2023
Free-space optical communication becomes challenging when an occlusion blocks the light path. Here, we demonstrate a direct communication scheme, passing optical information around a fully opaque, arbitrarily shaped occlusion that partially or entirely ...
Md Sadman Sakib Rahman, Tianyi Gan, Emir Arda Deger, Çağatay Işıl, Mona Jarrahi, Aydogan Ozcan   +5 more
doaj   +1 more source

All-optical retro-modulation for free-space optical communication

Optics Express, 2018
This work presents device and system architectures for free-space optical and optical wireless communication at high data rates over multidirectional links. This is particularly important for all-optical networks, with high data rates, low latencies, and network protocol transparency, and for asymmetrical networks, with multidirectional links from one ...
Brandon, Born, Ilija R, Hristovski, Simon, Geoffroy-Gagnon, Jonathan F, Holzman   +3 more
openaire   +2 more sources

Testing A Personalized Approach to Chronic Low Back Pain: A Randomized Controlled Trial in Older Veterans

Arthritis Care &Research, Accepted Article.
Objective We aimed to test the efficacy of personalized treatment of older Veterans with chronic low back pain (CLBP) delivered by Aging Back Clinics (ABC) as compared with usual care (UC). Methods Two hundred ninety‐nine Veterans age 65‐89 with CLBP from 3 VA medical centers underwent baseline testing, randomization to ABC or UC and 12 months follow ...
Debra K. Weiner, Angela Gentili, Meika A. Fang, Edward Garay, Laura Lawson, Lenore Joseph, Cathy C. Lee, Michelle I. Rossi, Beverly Thorn, Subashan Perera   +9 more
wiley   +1 more source

Leveraging InGaN solar cells for visible light communication reception

IET Networks
Solar cells are increasingly being utilised for both energy harvesting and reception in free‐space optical (FSO) communication networks. The authors focus on the implementation of a mid‐band p‐In0.01Ga0.99 N/p‐In0.5Ga0.5 N/n‐In0.5Ga0.5 N (PPN) solar cell,
Habib Ullah Manzoor, Sanaullah Manzoor, Muhammad Ali Jamshed, Tareq Manzoor   +3 more
doaj   +1 more source

Laser guide stars for optical free-space communications [PDF]

SPIE Proceedings, 2017
The German Aerospace Center (DLR) and the European Southern Observatory (ESO) performed a measurement campaign together in April and July 2016 at Teide-Observatory (Tenerife), with the support of the European Space Agency (ESA), to investigate the use of laser guide stars (LGS) in ground to space optical communications.
Mata Calvo, Ramon, Bonaccini Calia, Domenico, Barrios, Ricardo, Centrone, Mauro, Giggenbach, Dirk, Lombardi, Gianluca, Becker, Peter, Zayer, Igor   +7 more
openaire   +2 more sources

Sustainable Synthesis of Bio‐Based Magnetic and Conductive Wood for Electromagnetic Interference Shielding Applications

Advanced Engineering Materials, EarlyView.
A wood‐based magnetic and conductive material called Magwood (MW), capable of blocking almost 99.99% of electromagnetic waves (in the X‐band frequency range), is synthesized using a simple, solvent‐free process. MW is lightweight, resists water, and is flame‐retardant, making it a promising alternative for shielding electronics. The rapid proliferation
Akash Madhav Gondaliya, Majed Amini, Mohammad Arjmand, Earl Johan Foster   +3 more
wiley   +1 more source

Creation and characterization of vector vortex modes for classical and quantum communication

, 2017
Vector vortex beams are structured states of light that are non-separable in their polarisation and spatial mode, they are eigenmodes of free-space and many fibre systems, and have the capacity to be used as a modal basis for both classical and quantum ...
Cox, Mitchell A., Forbes, Andrew, Nape, Isaac, Ndagano, Bienvenu, Rosales-Guzman, Carmelo   +4 more
core   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Mobile free space optical communication system

SPIE Proceedings, 2008
The paper discusses a low power consumption, light weight and low cost 10MHz free-space optical communication (FSO). The system is designed for mounting on mobile platforms, with effective range of at least 50 meters. Light-Emitting Diodes (LEDs) and Laser diodes (LDs) are used in the transmitter for comparison for their relative performance in the ...
Wang, Xian, Hsu, Chi Yeh, Jin, Xiaomin
openaire   +2 more sources

Atmospheric channel effects on terrestrial free space optical communication links [PDF]

, 2009
. This paper illustrates the challenges imposed by the atmospheric channel on the design of a terrestrial laser communication link. The power loss due to scattering effect is described using the Kim/Kruse scattering model while the effect and the penalty
Awan, Muhammad, Ghassemlooy, Zabih, Leitgeb, Erich, Popoola, Wasiu Oyewole   +3 more
core   +1 more source