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Modulation of Relaxation Oscillation Frequency of a DFB Laser by Using Direct Detection

机译:直接检测调制DFB激光器的弛豫振荡频率

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Relaxation oscillation frequency is produced when a laser is operated in the low laser threshold current region. In this operation region, a semiconductor laser shows a smooth curve, where we can observe uncertainty into defining the onset of laser oscillation. Relaxation oscillations in the laser intensity can be seen as sidebands on both sides of the main laser line. In this context, a communication system by using a relaxation oscillation frequency as an information carrier is proposed in this paper. The experimental setup is based on operation principle of direct detection, where the obtained microwave signal at the output of a fast photodetector is located on C band and it is modulated with an analog NTSC TV signal.
机译:当激光器在低激光器阈值电流区域中操作时,会产生弛豫振荡频率。在此操作区域中,半导体激光器显示出平滑的曲线,在该曲线中,我们可以观察到不确定性来定义激光振荡的开始。激光强度的松弛振荡可以看作是主激光线两侧的边带。在这种情况下,本文提出了一种以张弛振荡频率为信息载体的通信系统。实验设置基于直接检测的操作原理,其中在快速光电检测器的输出处获得的微波信号位于C波段,并通过模拟NTSC TV信号进行调制。

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