基于相位调制器倍频技术产生56GHz毫米波的光载无线通信系统  

Radio-over-fiber system with 56 GHz optical millimeter-wave generation using an optical phase modulator based on frequency-doubling technology

作　　者：张明[1] 余建国[1] 曹子峥[2] 陈林[2] 

机构地区：[1]光纤通信技术和网络国家重点实验室,武汉430074 [2]湖南大学计算机与通信学院,微纳光电器件及应用教育部重点实验室,湖南长沙410082

出　　处：《光电子．激光》2010年第4期547-550,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金重点资助项目(60736003)

摘　　要：提出并实验研究了一种基于光相位调制器(PM)倍频技术产生56GHz毫米波的光载无线通信(RoF)系统。在中心站,通过28GHz射频(RF)信号驱动PM产生了56GHz光毫米波,并将下行的2.8Gb/s开关键控(OOK)信号调制到该光载波上,然后经过20km标准单模光纤(SSMF)传输至基站,最后由天线进行发射。用户终端接收后,采用相干解调恢复出基带信号。实验结果表明,56GHz光载毫米波信号经SSMF传输20km后其功率代价小于1dB,通过无线方式传输1.1m后其功率代价小于2.5dB。A radio-over-fiber（RoF） system with 56 GHz optical millimeter-wave（mm-wave） generation using an optical phase modulator（PM） based on frequency-doubling technology is proposed and demonstrated experimentally. Firstly, at the central station（CS）, a 56 GHz optical mrn-wave is generated by a 28 GHz microwave-signal source,which is applied to the phase modulator; secondly, 2.8 Gbit/s OOK downstream data is modulated onto 56 GHz optical carrier and then transmitted over 20 km of standard single-mode fiber（SSMF） to the base station（BS）;finally,it would be radiated by a transmission antenna. At the user terminal, baseband signal is retrieved from the downstream data by coherent detector. Experiment results show that the 56 GHz mm-wave signal can be transmitted over 20 km in SSMF with the power penalty less than 1 dB,and 1.1 m via wireless with the power penalty less than 2.5 dB.

关 键 词：光通信 光载无线通信(RoF) 倍频技术 光毫米波生成 光相位调制器(PM) 

分 类 号：TN929.11[电子电信—通信与信息系统]