Influence of beam wander on uplink of ground-to-satellite laser communication and optimization for transmitter beam radius

摘要

We restudy the influence of beam wander on the uplink of ground-to-satellite laser communication, using the effectivenpointing error method, for a collimated untracked Gaussian beam under a weak atmospheric turbulencencondition. It shows that the beam wander may cause significant increase in bit error rate (BER), and there existsnan optimal transmitter radius for minimizing the value of BER. Further studies manifest that this optimal radius onlynchanges with the laser wavelength and zenith angle, while independent on the satellite altitude and the fade thresholdnat the receiver. These results can be used in system design and optimization for the transmitter.