基于八倍频的单边带光载毫米波产生技术研究

Generation of single sideband optical millimeter-wave based on frequency-octupling technology

本文研究了一种基于八倍频技术产生单边带光载毫米波信号的新方案,该方案采用平行铌酸锂马赫-曾德尔调制器(DPMZM)产生了八倍频的光毫米波信号。当驱动DPMZM的两射频信号的相位差为π/2时,其子调制器可实现奇数边带与中心载波抑制,并产生两个四阶光边带信号,将其中一个光边带搭载基带数据,再通过光纤传输到光电探测器后,经光电转换后得到电毫米波信号。仿真结果表明,该方案产生的光载毫米波信号能有效抑制了光纤色散的影响,搭载5 Gbit/s基带数据的60 GHz和100 GHz的光载毫米波经过40 km标准单模光纤传输后,功率代价小于1 d B。

A novel scheme is proposed to generate a single sideband optical millimeter-wave （mm-wave） signal based on frequency octupling technology. A parallel LiNbO3 Math-Zehnder modulators （DPMZM） is employed to achieve optical millimeter wave of frequency octupling. With the π/2-phase difference between two MZM outputs, optical odd order sidebands and carrier are suppressed. Therefore, two fourth order opticalsidebands are obtained, one of which is modulated with the baseband date. After transmitting the optical signal through the fiber, an electrical mm-wave is generated by using photodetector. The simulation results show that a novel scheme is presented for generating optical mm-wave to overcome fiber dispersion. The power penalty of 60 GHz and 100 GHz optical mm-wave signal with 5 Gb/s baseband date is less than 1 dB over 40 km single mode fiber.