Performance Enhancement of an Orbital-Angular-Momentum-Based Free-Space Optical Communication Link through Beam Divergence Controlling

2015 ◽  
Author(s):  
Long Li ◽  
Guodong Xie ◽  
Yongxiong Ren ◽  
Nisar Ahmed ◽  
Hao Huang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Communication ◽  
Free Space ◽  
Performance Enhancement ◽  
Beam Divergence ◽  
Communication Link ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Space Optical Communication

Free-space optical communication link with shape-invariant orbital angular momentum Bessel beams

2019 ◽  
Vol 58 (16) ◽  
pp. 4258 ◽  
Author(s):  
Nokwazi Mphuthi ◽  
Lucas Gailele ◽  
Igor Litvin ◽  
Angela Dudley ◽  
Roelf Botha ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Communication ◽  
Free Space ◽  
Communication Link ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Bessel Beams ◽  
Shape Invariant ◽  
Space Optical Communication

scholarly journals Orbital Angular Momentum Multiplexed Free-Space Optical Communication Systems Based on Coded Modulation

2018 ◽  
Vol 8 (11) ◽  
pp. 2179 ◽  
Author(s):  
Zhen Qu ◽  
Ivan Djordjevic
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Communication ◽  
Free Space ◽  
Communication Systems ◽  
Huffman Coding ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Optical Communication Systems ◽  
Space Optical Communication

In this paper, we experimentally investigate the turbulence mitigation methods in free-space optical communication systems based on orbital angular momentum (OAM) multiplexing. To study the outdoor atmospheric turbulence environment, we use an indoor turbulence emulator. Adaptive optics, channel coding, Huffman coding combined with low-density parity-check (LDPC) coding, and spatial offset are used for turbulence mitigation; while OAM multiplexing and wavelength-division multiplexing (WDM) are applied to boost channel capacity.

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