Laser transmission model for a cross-medium uplink channel

In order to study the laser channel model in the uplink transmission process and the optical pulse distribution in the receiver. Based on the existing Monte Carlo method for underwater channel analysis, the random wave theory and the linear superposition method are used to model the wave, so a complete channel model is established. It is assumed that the transmitter emits a blue-green laser with a wavelength of 532nm underwater in the Coastal ocean. By tracking the photon transmission process, statistical results are obtained to analyze the influence of underwater transmission distance and sea surface wind speed on the photon distribution at the receiving end. The simulation results show that the wave height and variance of the wave spectrum increase with the increase of wind speed. When the sea surface wind speed is constant, the distribution of photons at the receiving end is more divergent with the depth of the transmitter under the water. When the underwater transmission distance is fixed, the number of photons received decreases with the increase of wind speed, and the distribution of photons is more divergent. Therefore, the sea surface wind speed and the depth of underwater transmitter have great influence on the transmission, and the research results will be of great reference value for the establishment of an accurate laser uplink channel transmission model.