Device and method for realizing alignment tracking wireless optical communication by using communication optical peripheral part

Abstract

The invention discloses a wireless optical communication device and method for achieving alignment tracking through a communication light peripheral part, and belongs to the technical field of wireless optical communication. An existing gigabit rate wireless optical communication system is large in size, weight and power consumption. In the multi-quadrant photoelectric detector of the device, a plurality of same alignment tracking detectors surround a communication detector to form an integral photosensitive surface; in the detection receiving module, an alignment tracking transimpedance amplifier and an alignment tracking limiting amplifier are connected to form amplification circuits, the multiple amplification circuits are parallel and are connected with a multi-channel A / D acquisitionchip, and the multi-channel A / D acquisition chip is further connected with an arithmetic unit. And between the multi-quadrant photoelectric detector and the detection receiving module, each alignmenttracking detector is connected with the input end of the alignment tracking transimpedance amplifier in each amplification circuit. According to the method, alignment tracking control signals are extracted by a plurality of alignment tracking detectors, communication electric signals are extracted by a communication detector, and communication and alignment tracking are synchronous.

Description

technical field [0001] The invention relates to a wireless optical communication device and method for realizing alignment and tracking by using the peripheral part of communication light, and belongs to the technical field of wireless optical communication. Background technique [0002] In a wireless optical communication system, the communication subsystem and the capture alignment tracking subsystem, as well as the capture alignment tracking subsystem, do not have a complete common-aperture structure, so it is necessary to ensure that multiple optical axes are precisely coaxial, including: 1 , Capture / coarse tracking and detection boresight are coaxial; 2, precise tracking and detection are boresight coaxial; 3, communication boresight are coaxial. Not only the structure is complex, but also the overall design, processing and assembly of the wireless optical communication system are very difficult, and the cost cannot be reduced. [0003] Therefore, a Chinese patent appl...

AI Technical Summary

Problems solved by technology

However, since the communication light-receiving optical system can only focus a part of the received light signal on the photodetector with a scale of microns, the loss of light energy is already relatively large. The signal is further weakened, and it has to be compensated by increasing the emitted light intensity, which also increases the weight, volume and power consumption of the device

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