An experimental study of wavefront correction for a heterodyne detection system for optical communication

An Effective Method for Enhancing Heterodyne Efficiency by Comparing the Effect of Degree of Polarization on an Uplink Path and a Downlink Path

“…By substituting Equation (10) by Equation ( 3), and converting to the polar coordinates ρ and ϕ, the power associated with the IF signal photocurrent can be expressed as: (11) where D is the hard aperture diameter of the detector. To simplify the calculation, we use the Gaussian limiting aperture, or soft aperture, to replace the hard aperture.…”

“…Heterodyne detection has been widely used in satellite-satellite [6], satellite-ground [7,8] and ground-ground [9] communication links in recent decades. The most significant effect on the performance of FSOC systems in the latter two applications is atmospheric turbulence [10], since the stochastic motion of the turbulent medium affects laser beam propagation. This propagation distortion causes a mismatch in the amplitude, phase, polarization and other characteristics of the signal beam and LO beam, reducing spatial coherence and the performance of the coherent optical communication system [11].…”

“…Li et al [5] developed a mathematical model for a heterodyne detection system for partially coherent Gaussian Schell beams under the Tatarskii turbulence spectrum in 2015. Furthermore, some of the authors of this paper investigated the effect of signal beam propagation in atmospheric turbulence on heterodyne detection, e.g., angle-of-arrival fluctuation [3], beam mode of the partially coherent Gaussian Schell-model beam [1,2], irradiance and phase fluctuations [13] and wavefront correction [10]. However, these works were based on the vector theory of partially coherent light fields or Gaussian beam.…”