Terahertz free space communication based on acoustic optical modulation and heterodyne detection

2011 ◽  
Vol 47 (15) ◽  
pp. 868 ◽  
Author(s):  
Y. Ma ◽  
S.C. Saha ◽  
A.L. Bernassau ◽  
D.R.S. Cumming
Keyword(s):  
Free Space ◽  
Heterodyne Detection ◽  
Optical Modulation ◽  
Space Communication ◽  
Free Space Communication

A high-speed retro-reflector for free-space communication based on electro-optic phase modulation

2003 ◽  
Vol 81 (4) ◽  
pp. 639-650 ◽  
Author(s):  
T Mikaelian ◽  
M Weel ◽  
A Kumarakrishnan ◽  
P R Battle ◽  
R C Swanson
Keyword(s):  
Laser Beam ◽  
Free Space ◽  
Phase Modulation ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Heterodyne Detection ◽  
Space Communication ◽  
Electro Optic ◽  
Beam Incident ◽  
Free Space Communication

We demonstrate that an electro-optic phase modulator (EOM) can be used as a constituent of a corner-cube-based modulated high-speed retro-reflector. We performed experiments to investigate the efficiency of the phase modulation produced by an EOM as a function of the angle of a laser beam incident on it. Our experiments demonstrate that the field of view of the EOM is determined by its dimensions and the diameter of the laser beam. This suggests that the device may be suitable for applications involving high-speed (GHz), free-space communication. In these applications, the retro-reflector can be mounted on a moving platform such as a satellite. We find that it is possible to detect the retro-reflected signal with an adequate signal-to-noise ratio using heterodyne detection. We also discuss some practical considerations necessary for the implementation of such a device. PACS Nos.: 42.60.–V, 42.62.Cf, 42.62.Fi, 42.79.Sz, 42.79.Hp

Chaos synchronization in mid-infrared quantum cascade lasers for private free-space communication

2021 ◽  
Author(s):  
Olivier Spitz ◽  
Andreas Herdt ◽  
Gregory Maisons ◽  
Mathieu Carras ◽  
Wolfgang Elsaser ◽  
...  
Keyword(s):  
Free Space ◽  
Chaos Synchronization ◽  
Quantum Cascade Lasers ◽  
Space Communication ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Cascade Lasers ◽  
Free Space Communication

Deployable wavelength optimization for free-space communication undersea

2016 ◽  
Author(s):  
Burton Neuner ◽  
B. Melvin Pascoguin ◽  
Alexandru Hening ◽  
Brian Dick
Keyword(s):  
Free Space ◽  
Space Communication ◽  
Free Space Communication

High-power mid- and far- wavelength infrared lasers for free space communication

2007 ◽  
Author(s):  
M. Razeghi ◽  
A. Evans ◽  
J. Nguyen ◽  
Y. Bai ◽  
S. Slivken ◽  
...  
Keyword(s):  
High Power ◽  
Free Space ◽  
Infrared Lasers ◽  
Space Communication ◽  
Free Space Communication
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