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.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
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)
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)
optical communication
radio over fiber（RoF）
frequency-doubling technology
optical milli-meter-wave generation
optical phase modulator（PM）
