Results 21 to 30 of about 316,906 (298)
Free Space Optical Technologies [PDF]
, 2010 Communications and transmissions are two fundamental concepts that follow the human being from the beginning. Free Space Optics is only one of the several choices that we have today in the complex and mixed telecommunication environment (WiFi, WiMax, LTE, Fibre, Coax, GSM, UMTS, et alt). With its inherent carachteristics like ease of installation, fast
Forin, Davide M. +8 more
openaire +2 more sources
Free-space-coupled wavelength-scale disk resonators
Nanophotonics, 2022 Optical microresonators with low quality factor (Q$Q$) can be efficiently excited by and scatter freely propagating optical waves, but those with high Q$Q$ typically cannot.
Mirzapourbeinekalaye Babak +4 more
doaj +1 more source
Performance Analysis of a Free Space Optics Link with Multiple Transmitters/Receivers
International Islamic University Malaysia Engineering Journal, 2012 : Multiple transmitters/receivers (TX/RX) are used to improve the quality of Free Space Optics (FSO) communication systems. With the current needs of this technology for longer distance communication, the qualitative analysis of the system has become ...
Nur Haedzerin Md Noor +2 more
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Modelling efficient BB84 with applications for medium-range, terrestrial free-space QKD
New Journal of Physics, 2022 Terrestrial free-space (FS) quantum key distribution (QKD) is ideally suited for deployment in dense urban environments. The transition from laboratory to commercial deployment, however, raises a number of important engineering and deployment issues ...
Thomas Brougham, Daniel K L Oi
doaj +1 more source
High-Speed Multi-Layer Convolutional Neural Network Based on Free-Space Optics
IEEE Photonics Journal, 2022 Convolutional neural networks (CNNs) are at the heart of several machine learning applications, while they suffer from computational complexity due to their large number of parameters and operations.
Hoda Sadeghzadeh, Somayyeh Koohi
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 +2 more
doaj +1 more source
Sub-micrometre accurate free-form optics by three-dimensional printing on single-mode fibres
Nature Communications, 2016 Combining freeform optics with micro- and nano-optics can permit wavefront shaping, phase engineering, k-space and polarization control. Here, Gissibl et al.
Timo Gissibl +3 more
doaj +1 more source
Test of mode-division multiplexing and demultiplexing in free-space with diffractive transformation optics [PDF]
, 2017 open5openGIANLUCA RUFFATO, 1; FILIPPO ROMANATO, ; 1Department of Physics and Astronomy ‘G. Galilei’, University of Padova; 2Laboratory for Nanofabrication of Nanodevices, c.so Stati Uniti 4GIANLUCA RUFFATO, 1; Romanato, Filippo; Ruffato, Gianluca ...
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Stabilized Free-Space Optical Frequency Transfer [PDF]
Physical Review Applied, 2018 The transfer of high-precision optical frequency signals over free-space links, particularly between ground stations and satellites, will enable advances in fields ranging from coherent optical communications and satellite Doppler ranging to tests of General Relativity and fundamental physics.
Gozzard, David +4 more
openaire +2 more sources
Diffractive optics approach towards subwavelength pixels
, 2018 Pixel size in cameras and other refractive imaging devices is typically limited by the free-space diffraction. However, a vast majority of semiconductor-based detectors are based on materials with substantially high refractive index.
Fan, Bo +2 more
core +1 more source