Room-temperature semiconductor modulators for free-space signal transmission with THz waves

2004 ◽  
Author(s):  
Thomas Kleine-Ostmann ◽  
Klaus Pierz ◽  
G’nter Hein ◽  
Philip Dawson ◽  
Martin Koch
Keyword(s):  
Free Space ◽  
Room Temperature ◽  
Signal Transmission ◽  
Thz Waves

Gigabit free-space multi-level signal transmission with a mid-infrared quantum cascade laser operating at room temperature

2017 ◽  
Vol 42 (18) ◽  
pp. 3646 ◽  
Author(s):  
Xiaodan Pang ◽  
Oskars Ozolins ◽  
Richard Schatz ◽  
Joakim Storck ◽  
Aleksejs Udalcovs ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Free Space ◽  
Room Temperature ◽  
Signal Transmission ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Multi Level

An investigation of 16-QAM signal transmission over turbulent RoFSO link modeled by gamma–gamma distribution

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Abhishek Tripathi ◽  
Shilpi Gupta ◽  
Abhilash Mandloi ◽  
Gireesh G Soni
Keyword(s):  
Gamma Distribution ◽  
Free Space ◽  
Signal Transmission ◽  
Channel Modeling ◽  
Symbol Error Rate ◽  
Average Error ◽  
60 Ghz ◽  
Free Space Optical ◽  
Error Vector Magnitude ◽  
Space Optical Communication

AbstractThis paper outlines the performance of a 10 Gbit/s rectangular 16-quadrature amplitude modulation–based radio over free space optical communication system. Here, 60 GHz radio frequency–modulated signal is propagated through a 1550-nm free space optical link. The gamma–gamma distribution is used for the channel modeling of weak to strong atmospheric turbulence. The reported constellation plots and eye patterns are attributed to impairment factors in adverse conditions of atmosphere. The evaluation is carried out that the variation in average error vector magnitude in the range of 1.45–1.63% and equivalent symbol error rate of 0.019–0.023 are obtained for a clear atmosphere compared to the turbulent link of 0.2–1 km, respectively.

scholarly journals Room Temperature Direct and Heterodyne Detection of 0.28–0.69-THz Waves Based on GaN 2-DEG Unipolar Nanochannels

2016 ◽  
Vol 63 (1) ◽  
pp. 353-359 ◽  
Author(s):  
Carlos Daher ◽  
Jeremie Torres ◽  
Ignacio Iniguez-de-la-Torre ◽  
Philippe Nouvel ◽  
Luca Varani ◽  
...  
Keyword(s):  
Room Temperature ◽  
Heterodyne Detection ◽  
Thz Waves
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