日盲区紫外光通信真空光源研究进展

Progress of Solar Blind Ultraviolet Light Source for Communication

日盲区紫外光非视距通信具有抗干扰能力强、保密性好、全天候、全方位等优点。要使通信系统尽可能具有远传输距离和高传输速率,就要求紫外光源兼备大输出功率和高调制频率。近年来,基于电子束在真空中易于加速和方便调制的特点,利用高能电子束轰击荧光物质激发紫外光,为实现大功率和高调制频率日盲区紫外光通信光源提供了一种新型有效的解决方案。已有研究表明,真空电子日盲区紫外光源能够实现百毫瓦级输出功率和兆赫兹调制频率,有望解决日盲区紫外光非视距通信系统光源的瓶颈问题,推动相关技术的快速发展。针对日盲区紫外光通信核心部件—紫外光源的技术需求,本文介绍了紫外光源的国内外研究进展。

Ultraviolet(UV)non-line-of-sight(NLOS)communication in solar blind range,holding advantages of powerful anti-jamming ability,good security,all-weather,omni-directivity,etc.,put forward high technical requirements to the light sources.To make communication systems as long range and high rate as possible,UV light sources are required to have both high output power and high modulation frequency.In recent years,the use of high-energy electron beams to bombard fluorescent substances has been proved as a novel and effective approach to excite UV light with both high output power and high modulation rate,which result from the readily acceleration and flexible modulation of electron beams in vacuum.It has been shown that the UV light excited by vacuum electron can achieve hundreds milliwatt output power and megahertz modulation rate in solar blind range.Therefore,UV light sources excited by electron beam is promising to solve the bottleneck problem on light source for NLOS communication system in solar blind range and is beneficial for promoting the relevant techniques.