Compound gas flow generation device under mutual action of atmosphere turbulence and laser

Abstract

The invention discloses a compound gas flow generation device and in particular relates to a compound gas flow generation device under mutual action of atmosphere turbulence and laser. The compound gas flow generation device comprises a gas flow generation device main body, a turbulence circulation system, a gas inlet, a multi-light-path system, an optical observation window, a gas parameter sensor and a digital signal processing (DSP) controller. The compound gas flow generation device has multiple turbulence modes, so that gases which are different in gas pressure and components can be simulated, and advection and convection can be simulated; an external cold air and hot air circulation system is adopted, so that the system is relatively high in temperature stability and controllability; furthermore, different air fields are produced through different rotational flow guide devices in the circulation controller, so that a relatively complicated atmosphere turbulence environment can be simulated; an improvement-based Harriet multi-light-path system is adopted, so only one compound gas flow device is needed; when the reflection frequency is more than 500, a light path is more than 500 meters; and the problems of high cost, complexity in use and the like which are caused by cascade are solved.

Description

technical field [0001] The invention relates to a composite airflow generating device, in particular to a composite airflow generating device in which atmospheric turbulence interacts with laser light. Background technique [0002] The transmission of laser in the atmosphere is closely related to the application of laser communication, optical radar, satellite remote sensing, long-distance measurement, laser weapons, etc. Characteristics, so it has the advantages of large capacity, narrow beam, fast speed, good confidentiality and strong anti-interference, so laser has become the most ideal carrier in wireless optical communication. However, laser transmission in the atmosphere is a very complicated random process. Due to the random fluctuation of the atmospheric refractive index, after the laser travels a certain distance in the atmospheric turbulence, the beam will expand, the light intensity will fluctuate, and the information carried by the beam will be affected by diffe...

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Problems solved by technology

However, for the study of the interaction between laser and atmospheric molecules, the factors that must be considered are: (1) different turbulence, such as advection, convection, and turbulence; (2) the realization of multiple optical paths, because the actual laser communication, when When the distance is short, the impression of atmospheric turbulence on the laser is small. When performing long-distance experiments, this patent requires as many single-section simulation devices as possible to be cascaded. Each section is 1m. If you want to reach 100m, you need 100 sections. It is more difficult to realize, and when cascading, it will also cause experimental errors due to multiple passes through the optical window; (3) heating, cooling, and fan lights are installed inside the device, which can easily cause heat loss in the optical system. And cold deformation and vibration will also cause experimental errors

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