The third paragraph in Sec. IV REGENERATIVE AMPLIFICATION erroneously states “In other words, the distribution of spectral components is time-dependent, and the spectral distortion in the amplification process will not change the time-domain shape.”35,41 Instead it should state “In other words, the distribution of spectral components is time-independent, and the spectral distortion in the amplification process will not change the time-domain shape.”41

The authors apologize for the typos.