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本文对紫外日盲区光谱在近距离、保密通信中的应用进行了探讨 ,并建立了紫外光学通信原理实验系统。所描述的系统是以日盲区紫外光作为信息载体的 ,用被调制的低压汞蒸汽紫外放电灯作为发射器件 ,以日盲型滤光片和光电倍增管或日盲型紫外光电倍增管作为接收器件 ,以达到在任何时间和在任何气候下完成窄频带模拟或低速数字信号的传输。由于近地表大气臭氧层的吸收 ,所以传输距离被限制在一个较小的范围内 ,构成了短距离的、秘密的、安全的和抗干扰的通信系统 ,并且不需要传统意义上的天线。由于地球大气上层臭氧的吸收作用 ,阳光中的日盲区 (2 0 0～ 2 80 nm)辐射几乎无法到达地球表面 ,因此 ,采用这个波段的光学通信系统几乎不会受到太阳光的干扰。典型的大气臭氧浓度高度分布大约在距地表 2 5 km处达到最高值 ,在海平面处有一个较低的值。相对较低的浓度值来说 ,虽然紫外辐射传输有限 ,但是具有足够远的距离 ,同时可达到安全、秘密和抗干扰的目的
This paper discusses the application of UV-blind solar spectrum in short distance and secure communication, and establishes the experimental system of UV optical communication principle. The system described is based on day-blind UV light as the information carrier, with a modulated low-pressure mercury vapor UV discharge lamp as the emitting device, with a solar-blind filter and a photomultiplier tube or a solar-blind UV photomultiplier tube as a receiver Devices to achieve at any time and in any climate to complete a narrowband analog or low-speed digital signal transmission. Due to the near-surface atmospheric ozone layer absorption, the transmission distance is limited to a small area, forming a short-range, confidential, secure and interference-free communication system and does not require antennas in the traditional sense. Due to the absorption of ozone in the upper atmosphere of the Earth, the solar radiation in the blind zone (200 ~ 280 nm) hardly reaches the Earth’s surface. Therefore, the optical communication system using this band is hardly affected by the sunlight. The typical atmospheric ozone concentration is highly distributed about 25 km above the surface, reaching the highest value at sea level with a lower value. Relatively low concentrations of radiation, although the limited transmission of ultraviolet radiation, but far enough distance, while achieving the purpose of security, secrecy and anti-jamming