无滤波高倍频光载毫米波生成技术

提出了一种无滤波的高倍频光载毫米波生成方案.该方案未使用相关的光/电滤波器就可16倍频的毫米波信号.整个系统采用三平行的马赫-曾德尔调制器结构和单个马赫-曾德尔调制器级联,通过调整系统的参数可以很好地抑制所有冗余光边带,只留下高质量的8阶光边带,无需任何光/电滤波器就能够得到16倍频的高质量毫米波信号.另外,详细分析了系统的工作原理,并通过仿真验证了调制深度、消光比、移相器偏移以及调制器偏压对系统的影响.研究结果表明将2 Gbit/s的非归零码型数据与10 GHz的射频信号混频后作为马赫-曾德尔调制器的驱动信号,系统经过50 km光纤传输后的链路功率代价为1.0 dB,具有良好的传输性能.该方案对于无滤波的高倍频毫米波生成有一定的参考价值.

Photonic Generation of Filterless Frequency Multiple Tupling Optical Millimeter-wave Signal

A scheme is proposed for millimeter-wave signal generation without filters.No optical or electrical filters are used in the scheme,and the scheme can obtain 16-tupling millimeter-wave signals.The scheme adopts the structure of cascading a three-parallel Mach-Zehnder modulator structure and a single Mach-Zehnder modulator.All redundant sidebands can be suppressed very well by adjusting the parameters of the system and only 8th order optical sidebands are left.The scheme can obtain 16-tupling millimeter-wave signals without any optical or electrical filters.The theoretical analysis for this proposed scheme are provided,and the effects of modulation depth,extinction ratio,phase shifter offset and modulator bias on the system are verified by simulation.The 10 GHz radio frequency signal is mixed with the 2 Gbit/s non-return-to-zero pattern data as the driving signal of the Mach-Zehnder modulator,it is verified that the power cost of the system link through 50 km optical fiber transmission is only 1.0 dB.The system can meet the needs of communication systems with good transmission performance.The scheme has certain reference value for the generation of high frequency millimeter wave signal without filters.