Adaptive optics for the free space coherent optical communications

We present the resultsthattheperformancesoftheatmosphericcoherentopticalcommunications improvedbyareal127-elementadaptiveopticssystemoperatingin1550nmwavelengthona1.8m telescope. Themixingefficiency andtheBERofthehomodynefree-spaceopticalcoherentcommu- nications havebeenanalyzedwiththecorrectionofth