For obtaining a pulse series with a small amplitude ripple, an Erbium-doped Fiber Amplifier (EDFA) must be added into the primary experiment setup to enhance injection-modulation signal power.

为了获得振幅均衡的有理数谐波锁模脉冲，必须在原有的实验装置中添加一个掺铒光纤放大器(EDFA)以提高注入调制光信号功率。

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Because of the ripple of the DC power supply, the output harmonic amplitude of the voltage controlled SPWM inverter is higher.

由于直流供电电源纹波的影响，电压控制SPWM逆变电路的输出谐波分量幅值较大。

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