Amplitude jitter of waveforms generated via spectral line-by-line pulse shaping due to CW laser linewidth

摘要

The system model of spectral line-by-line pulse shaping on an optical frequency comb produced by electro-optical modulation of a continuous-wave (CW) laser is presented, and the effect of the laser linewidth on the generated waveforms is investigated through system simulation. Three kinds of phasing-only line-by-line filter are considered. The results show that amplitude jitter is induced by CW laser linewidth, and it becomes prominent when the phase control applied to spectral lines varies rapidly. To keep the induced jitter lower than -20 dB, a CW laser with a linewidth narrower than 100 kHz can be safely employed.