Long-distance free-space quantum cryptography

Author(s):  
Christian Kurtsiefer ◽  
P. Zarda ◽  
M. Halder ◽  
Ph. M. Gorman ◽  
Paul R. Tapster ◽  
...  
2020 ◽  
Vol 125 (26) ◽  
Author(s):  
Yuan Cao ◽  
Yu-Huai Li ◽  
Kui-Xing Yang ◽  
Yang-Fan Jiang ◽  
Shuang-Lin Li ◽  
...  

Author(s):  
C Kurtsiefer ◽  
M Halder ◽  
H Weinfurter ◽  
P Zarda ◽  
P Tapster ◽  
...  

Author(s):  
Morio TOYOSHIMA ◽  
Yozo SHOJI ◽  
Christian SCHAEFER ◽  
Yoshihisa TAKAYAMA ◽  
Hiroo KUNIMORI ◽  
...  

2018 ◽  
Vol 16 (36) ◽  
pp. 104-112
Author(s):  
Abdullah A. Abdullah

Light has already becomes a popular means of communication, and the high-bandwidth data into free space without the use of wires. A great idea took us to design a new system for transmitting sound through free space at (650, 532) nm wavelengths using reflective mirrors under different atmospheric conditions. The study showed us the effect of various weather factors (temperature, wind speed and humidity) on these wavelengths for different distances. As well as studying the attenuation caused by long-distance laser and beam divergence, A reflective dish was used to focus the spot of the laser beam on the photocell. Results were discussed under the effect of these factors and the attenuation resulting from the beam divergence. Thus, the system performance can be improved for range and the quantity transfer data by increasing transmitted power and reducing the divergence of the laser beam.


Author(s):  
T. Schmitt-Manderbach ◽  
H. Weier ◽  
N. Regner ◽  
Ch. Kurtsiefer ◽  
H. Weinfurter

2019 ◽  
Vol 13 (10) ◽  
pp. 1900103 ◽  
Author(s):  
Christian Vetter ◽  
Ralf Steinkopf ◽  
Klaus Bergner ◽  
Marco Ornigotti ◽  
Stefan Nolte ◽  
...  

2008 ◽  
Vol 63 (1-4) ◽  
pp. 179-184 ◽  
Author(s):  
Morio Toyoshima ◽  
Yoshihisa Takayama ◽  
Werner Klaus ◽  
Hiroo Kunimori ◽  
Mikio Fujiwara ◽  
...  

Author(s):  
R. J. Hughes ◽  
W. T. Buttler ◽  
P. G. Kwiat ◽  
S. K. Lamoreaux ◽  
G. L. Morgan ◽  
...  

2006 ◽  
Author(s):  
M. Fürst ◽  
T. Schmitt-Manderbach ◽  
H. Weier ◽  
I. Ordavo ◽  
H. Weinfurter

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