Alignment difficulty in free space optical communication is significantly reduced by ultraviolet communication. The problem of unclear propagation characteristics of ultraviolet light in the atmosphere is addressed. Simulations based on the Monte Carlo method were conducted. A real-time UVC (ultraviolet C radiation) system was proposed and designed. Real-time signal processing algorithms for transmission and reception were designed using a FPGA (field-programmable gate array). Ultraviolet light of multiple wavelengths was emitted by Light Emitting Diodes. Optical signals were received by a Photomultiplier Tube. Significant differences in atmospheric attenuation characteristics for different wavelengths are shown by the experimental results. Communication performance is directly affected by these differences. A small BER(bit error rate ) difference between 250 nm and 300 nm systems is observed at a communication distance of less than 60 meters. At a distance of 100 meters, a BER of approximately 10-4 is exhibited by the 300 nm system. A BER of approximately 10-2 is exhibited by the 250 nm system. At a distance of 120 meters, no photons are detected in the 250 nm system. A small number of photons are still detected by the Photomultiplier Tube in the 300 nm system. Lower attenuation and stronger transmission capability are indicated by the UVC system with a longer wavelength.
ZHANG Jun-chi, LIANG He-xi, LI Hang, SHEN Tian-hao.
Simulation and Experimental Verification of Ultraviolet Light Wavelength Characteristics Based on Monte Carlo Method[J].
Science Technology and Engineering, 2026, 26(18): 7741-7746 DOI:10.12404/j.issn.1671-1815.2506793
然而,现有研究仍存在显著局限性:不同波长紫外光的衰减特性差异缺乏系统性量化分析,这种认知缺口导致当前技术方案多依赖经验性调整,难以形成普适性设计准则,这正是本文研究的切入点。因此,现综合上述文献的实验系统设计经验,在蒙特卡洛仿真的基础上,设计一个紫外线C波段(ultraviolet C radiation,UVC)系统,建立空间紫外光通信链路,通过实验分析不同波长紫外光在大气中的传输特性,为后续紫外光通信系统的波长选择与链路设计提供具体的参考依据。
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