Turbulence suppression method and device for precompensating transmitted optical power in reverse modulation optical communication

Abstract

The invention discloses a turbulence suppression method and device for pre-compensating transmitted optical power in reverse modulation optical communication. The device is divided into an inquiry end and a reverse modulation end. The inquiry end emits laser light, which is transmitted to the reverse modulation after the beam is collimated through an optical antenna. At the end, the modulator at the reverse modulation end modulates the input signal onto the laser light sent from the inquiring end, and reflects back the original direction of the laser light sent from the inquiring end through the "cat's eye" effect; The mechanism senses the size of the received signal through the light intensity amplitude sampling module, so that the transmitted optical power can be adaptively changed. The invention can maintain the received light intensity at a constant value, thereby suppressing the influence of atmospheric turbulence on reverse modulation wireless optical communication, and realizing reverse modulation wireless optical communication with better performance.

Description

Technical field [0001] The present invention belongs to the field of wireless optical communication technology, in particular a reverse modulation optical communication in the precompensation of the transmission of optical power turbulence suppression method and apparatus. Background [0002] With the advent of the twenty-first century, mankind has also entered the era of informatization, with the establishment of a huge communication network, human beings have higher and higher requirements for communication quality, and the transmission of huge data information has become higher and higher for communication rates. In military communications, traditional communication methods such as radio communications are affected by insufficient communication capacity, weak anti-interference ability, limited spectrum distribution and other factors, while optical fiber communications are affected by unfavorable factors such as terrain, making the erection and maintenance of optical fibers ver...

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Problems solved by technology

Aperture averaging needs to increase the aperture of the optical antenna, and space diversity needs to increase the number of transceivers, resulting in high cost and difficulty

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