Optical transmitting antenna system and beam control method thereof

Abstract

The invention discloses an optical transmitting antenna system and a beam control method thereof. An optical antenna has an array structure which is formed by uniformly arranging a plurality of laser transmitting antennae and a plurality of receiving antennae. The array structure is arranged on a cambered surface (a hemispherical surface or a spherical surface). Each laser transmitting antenna comprises a transmitting multimode fiber and a transmitting micro-lens. Each receiving antenna comprises a receiving multimode fiber and a receiving micro-lens. A transmitting micro-lens is positioned in the center of each receiving micro-lens. By the optical transmitting antenna system and the beam control method thereof, the mobile communication of a near-earth atmospheric laser system is well realized, dependence on a complex acquisition pointing and tracking (APT) system is reduced, and communication reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of laser communication, and in particular relates to a multi-beam optical antenna device based on beam controllable technology in a mobile atmospheric laser communication system, which utilizes the line-of-sight transmission characteristics of beams, angle diversity technology and control algorithms to realize intelligent communication between optical antennas. capture, alignment and tracking. Background technique [0002] Atmospheric laser communication, also known as Free Space Optical Communication (FSO) or Wireless Optical Communication (Wireless Optical Communication), is an emerging wireless communication method that can carry both digital and radio frequency signals. It has the advantages of large communication capacity, good security and confidentiality, strong anti-electromagnetic interference ability, and no need to apply for wireless frequency bands. It has important application value in the field...

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Problems solved by technology

At present, the research on APT technology focuses on traditional mechanical methods such as stepping motors or fast vibrating mirrors. In fixed-point FSO communication, the automatic adjustment mechanical device of the system itself overcomes the influence of small-scale device vibration and deformation. Meet the requirements of laser communication accuracy; in space FSO communication (such as between satellites and satellites and between satellites and the ground), through precise control of stable platforms and high-speed galvanometers, laser communication accuracy requirements can also be met, but its The price is the need to design a complex APT system; and for near-earth mobile (especially fast-moving) atmospheric laser communication systems, due to the influence of atmospheric effects and relative motion of the target will be more significant, the current APT technology cannot meet the requirements of laser communication

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