Underwater long-distance photon counting communication denoising method and system

• Main Authors: FENG XIAOWEI, WANG XINGKE, LI HUAILIANG, HE NING, XU SHANZHI, WANG ZHEN, WEI JIAGUANG, ZHANG XIWEI
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2024
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The invention discloses an underwater long-distance photon counting communication denoising method. The method comprises the following steps: loading a modulation signal on a Gaussian beam of a laser; the spatial light modulator converts the loaded Gaussian beam into a vortex beam; the vortex light beam is transmitted to an optical transmitting unit and then is transmitted to a signal receiving end; the signal receiving end performs focusing after receiving the optical signal; the focused vortex light beam is subjected to noise reduction through a vortex light noise reduction unit; the single-photon detector is used for detecting the vortex light subjected to noise reduction; the invention further discloses an underwater long-distance photon counting communication denoising system. According to the invention, an underwater communication mode based on vortex light is adopted, detection counting is carried out in combination with underwater photon counting, the anti-interference performance and communication di