Fifthly, based on the direct modulation laser (DML), we have proposed and experimentally demonstrated two RoF systems.
第五,研究采用直接调制激光器产生和传输光毫米波信号。
参考来源 - 光纤无线系统中光毫米波的产生和全双工通信研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In this paper, direct modulation technology working at Microwave band is researched.
本文研究的是微波波段的直接调制技术。
The power penalty of direct modulation is smaller than that of external modulation at the same crosstalk level.
在相同串扰水平情况下，直接调制的功率代价小于外调制的功率代价。
The method of direct modulation is: change the ready information to current signal and then inject the LD or LED to obtain the corresponding light signal, thus the idea is source modulation.
直接调制是把要传送的信息转变为电流信号注入LD或LED，从而获得相应的光信号。
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