Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Skevos Karpathakis"'
Autor:
Ayden McCann, Alex Frost, Skevos Karpathakis, Benjamin Dix-Matthews, David Gozzard, Shane Walsh, Sascha Schediwy
Publikováno v:
Photonics, Vol 11, Iss 7, p 633 (2024)
Free space optical technology promises to revolutionize point-to-point communications systems. By taking advantage of their vastly higher frequencies, coherent optical systems outperform their radio counterparts by orders of magnitude in achievable d
Externí odkaz:
https://doaj.org/article/9f01950610ec44bb9e8c9914e1506755
Autor:
Benjamin P. Dix-Matthews, Sascha W. Schediwy, David R. Gozzard, Etienne Savalle, François-Xavier Esnault, Thomas Lévèque, Charles Gravestock, Darlene D’Mello, Skevos Karpathakis, Michael Tobar, Peter Wolf
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Atomic clocks and their networks are useful tools for optical communications and frequency metrology. Here the authors use phase stabilization and active tip-tilt to suppress atmospheric effects and enable optical frequency transfer through free-spac
Externí odkaz:
https://doaj.org/article/05fc4052970040a68e0158266aff628f
Free-space continuous-wave laser interferometry using folded links has applications in precision measurement for velocimetry, vibrometry, optical communications, and verification of frequency transfer for metrology. However, prompt reflections from t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::807d62cf6537afa86e4a0740a116c9e2
https://doi.org/10.1364/opticaopen.22672420.v1
https://doi.org/10.1364/opticaopen.22672420.v1
Autor:
Sascha Schediwy, Charles Gravestock, Alex Frost, Skevos Karpathakis, Ayden McCann, Shane Walsh, David Gozzard, Benjamin Dix-Matthews
Geopotential and orthometric height differences between distant points can be measured via timescale comparisons between atomic clocks. Modern optical atomic clocks have residual instabilities on the order of 10^-18}, allowing height differences of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2106d0b6a32198cb3590d74c8b41b477
https://doi.org/10.36227/techrxiv.21637715
https://doi.org/10.36227/techrxiv.21637715
Autor:
Sascha Schediwy, Alex Frost, Ayden McCann, Shane Walsh, Skevos Karpathakis, David Gozzard, Benjamin Dix-Matthews
We report on the development of a system called velocimetry by actively stabilised coherent optical transfer (VASCOT) that is capable of overcoming these challenges. VASCOT optically tracks the phase of the returned signal to allow for narrow-band ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41b6ad6d17103fc945fc75f63cbf0a34
https://doi.org/10.36227/techrxiv.21637727
https://doi.org/10.36227/techrxiv.21637727
Autor:
Shane Walsh, Skevos Karpathakis, Ayden McCann, Benjamin Dix-Matthews, Alex Frost, David Gozzard, Charles Gravestock, Sascha Schediwy
Free-space optical communications are poised to alleviate the data-flow bottleneck experienced by spacecraft as traditional radio frequencies reach their practical limit. While enabling orders-of-magnitude gains in data rates, optical signals impose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::713c12dc1df40b205c6b4bd6661c7c06
https://doi.org/10.21203/rs.3.rs-1951625/v1
https://doi.org/10.21203/rs.3.rs-1951625/v1
Autor:
Shane Walsh, Alex Frost, Lewis Howard, David Gozzard, Skevos Karpathakis, Benjamin Dix-Matthews, Charles Gravestock, Ayden McCann, Sascha Schediwy
Publikováno v:
Optics letters. 47(8)
Corner cube retroreflectors are commonly used as cooperative targets in free-space laser applications. The previous literature suggests that due to path reciprocity, a retroreflected beam is self-corrected across a turbulent atmosphere and should sho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da32e8fbd4c15e0d949540e94960550f
https://pubmed.ncbi.nlm.nih.gov/35427300
https://pubmed.ncbi.nlm.nih.gov/35427300