Simulation method and system for Bessel Gaussian beam transmission characteristics in turbulent atmosphere

Abstract

The invention provides a simulation method and system for transmission characteristics of Bessel Gaussian beam in turbulent atmosphere. The simulation method for the transmission characteristics of Bessel Gaussian beam in turbulent atmosphere comprises: simulating an atmospheric laser communication system; and establishing an atmospheric laser communication channel model. The atmospheric laser communication system comprises a transmitting end, a receiving end and a turbulent atmospheric channel. After the transmitting end transmits the Bessel Gaussian beam, the Bessel Gaussian beam is transmitted in the turbulent atmospheric channel, and the receiving end receives the Bessel Gaussian beam and outputs the received light spot. By simulating the process of the laser beam passing through the atmospheric channel, the influence of the change of the channel and laser beam parameters on the transmission quality is analyzed in real time, and the method and the approach for improving the qualityof the laser communications in the atmosphere are proposed based on the simulation results. The simulation method and system for the transmission characteristics of Bessel Gaussian beam in turbulentatmosphere provided by the invention have important practical significance and practical value.

Description

technical field [0001] The invention belongs to the field of atmospheric laser transmission, and in particular relates to a method and system for simulating transmission characteristics of a Bessel Gaussian beam in turbulent atmosphere. Background technique [0002] Since the birth of the laser in 1960, the use of laser beams as information carriers to achieve bandwidth communication has become the goal pursued by people. The laser communication technology with the atmosphere as the propagation medium has received extensive attention, but due to the influence of random atmospheric channels, the atmospheric laser communication system Reliability, economy, transmission distance and performance indicators failed to meet the expected goals, so the realization of long-distance laser communication on the ground has gradually cooled down. With the emergence of low-loss optical fibers, the research and development focus of optical communication has shifted to optical fiber communicat...

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Problems solved by technology

[0005] Aiming at the shortcomings that the model structure is very complicated and not easy to understand and practically apply, the present invention proposes a simulation method and system for the transmission characteristics of a Bessel Gaussian beam in a turbulent atmosphere, which can analyze the transmission distance, turbulence and laser very intuitively. The influence of various parameters on the received light intensity, including simulating the atmospheric laser communication system, in which the atmospheric laser communication system includes a transmitter, a receiver and a turbulent atmospheric channel. After the transmitter emits a Bessel-Gaussian beam, the Bessel-Gaussian beam Transmitting in the atmospheric channel, the receiving end receives the Bessel Gaussian beam, and outputs the received light spot, which is characterized in that it includes the following steps:

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