激光技术
激光技術
격광기술
LASER TECHNOLOGY
2014年
1期
26-29
,共4页
光通信%散射通信%光发射阵列%光束发散角%脉冲位置调制%接收能量
光通信%散射通信%光髮射陣列%光束髮散角%脈遲位置調製%接收能量
광통신%산사통신%광발사진렬%광속발산각%맥충위치조제%접수능량
optical communication%scatter communication%light emitter array%beam divergence angle%pulse position modulation%received energy
为了更准确地研究紫外光的通信性能，针对紫外 LED 散射光通信中光能量传输特征，以及光束发散角对散射链路构成与接收光子能量有一定影响，采用多个 LED 组成阵列发射的方法，扩大光束与散射体的作用效应，分析了光束发散角对不同散射体作用时光子能量的变化关系，研究了紫外光散射通信脉冲调制方法与提高发射功率措施，提出了脉冲位置调制驱动阵列 LED 的解决方案，并进行了紫外 LED 散射通信系统室外传输测试。结果表明，在短距离通信中，大的散射角使得光对散射体的作用区域增大，散射效应明显，到达光接收端的光子数量增加；实际通信应用中，散射光通信具有较高的灵活性和实时性，可适当进行光学处理来优化光路结构。此结果为进一步增加传输距离和传输效果提供了正确的指导。
為瞭更準確地研究紫外光的通信性能，針對紫外 LED 散射光通信中光能量傳輸特徵，以及光束髮散角對散射鏈路構成與接收光子能量有一定影響，採用多箇 LED 組成陣列髮射的方法，擴大光束與散射體的作用效應，分析瞭光束髮散角對不同散射體作用時光子能量的變化關繫，研究瞭紫外光散射通信脈遲調製方法與提高髮射功率措施，提齣瞭脈遲位置調製驅動陣列 LED 的解決方案，併進行瞭紫外 LED 散射通信繫統室外傳輸測試。結果錶明，在短距離通信中，大的散射角使得光對散射體的作用區域增大，散射效應明顯，到達光接收耑的光子數量增加；實際通信應用中，散射光通信具有較高的靈活性和實時性，可適噹進行光學處理來優化光路結構。此結果為進一步增加傳輸距離和傳輸效果提供瞭正確的指導。
위료경준학지연구자외광적통신성능，침대자외 LED 산사광통신중광능량전수특정，이급광속발산각대산사련로구성여접수광자능량유일정영향，채용다개 LED 조성진렬발사적방법，확대광속여산사체적작용효응，분석료광속발산각대불동산사체작용시광자능량적변화관계，연구료자외광산사통신맥충조제방법여제고발사공솔조시，제출료맥충위치조제구동진렬 LED 적해결방안，병진행료자외 LED 산사통신계통실외전수측시。결과표명，재단거리통신중，대적산사각사득광대산사체적작용구역증대，산사효응명현，도체광접수단적광자수량증가；실제통신응용중，산사광통신구유교고적령활성화실시성，가괄당진행광학처리래우화광로결구。차결과위진일보증가전수거리화전수효과제공료정학적지도。
According to transmission characteristics of optical energy in ultraviolet light-emitting diode (LED) scattering communication,the beam divergence angle has a certain influence on scattering link structure and received photon energy.The action effect of the beam and scatterers was strengthened with the transmit array composed by a plurality of LEDs.With the effects of different scattering on the beam divergence angle,the changing of the photon energy was analyzed.In order to study the UV communication performance more accurately,pulse modulation method and measures to increase the transmission power of UV scattering communication were studied,the solution of LED array driving circuit and the pulse position modulation (PPM)were given,scattering communication system transmission of UV-LED was tested outdoor.The experimental results showed that,in the short distance communication,large scattering angle made the light area of scatterers increase and more effective of scattering,the amount of photons arriving at receiving was increased.In the actual communication applications,the scattering optical communication was higher flexibility and real-time,appropriate optical processing can be used to optimize the structure of the optical path for increasing the transmission distance.The result provides a correct guidance for larger transmission distance and better transmission effect.
