4 September 2015 Orthogonal phase modulation with self homodyne detect laser communication method for the satellite-to-ground link
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Abstract
Signal laser propagation will pass through the random atmosphere turbulence channel in satellite-to-ground laser communication application. The turbulence will cause the wavefront distortion in the receiver telescope front. For direct detection laser communication system, atmospheric turbulence can affect the coupling efficiency from space laser to the detector. For coherent detection laser communication system, Atmosphere turbulence not only affects the coupling efficiency, but also can seriously reduce the heterodyne detection efficiency. Coherent detection communication receiver must use small aperture telescopes or large aperture telescope with adaptive wavefront compensation system.

To mitigate the influence of the atmosphere turbulence, we proposed a new method base orthogonal phase modulation with self homodyne detect. This method can not only mitigate the influence of the turbulence, but also adjust the communication date rate steplessly. The experiment results show that the method is very suitable to the satellite-to-ground link.
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Jianfeng Sun, Peipei Hou, Xiaoping Ma, Liren Liu, "Orthogonal phase modulation with self homodyne detect laser communication method for the satellite-to-ground link", Proc. SPIE 9614, Laser Communication and Propagation through the Atmosphere and Oceans IV, 96140Y (4 September 2015); doi: 10.1117/12.2185899; https://doi.org/10.1117/12.2185899
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