Investigation on Four-Wave-Mixing-Based Temporal Measurement of Low-Power-Density Optical Pulse

作者：Bowen Ma , Lei Yu , Jianping Chen , and Weiwen Zou *
摘要：We theoretically and experimentally investigate an all-optical temporal measurement of low-power-density optical pulse shape based on the four-wave-mixing process. It is found that two parameters of the pulse width ratio and frequency difference of the two optical sources are crucial to the measurement accuracy. The qualitative analysis of the impact of the two parameters on the measurement accuracy is employed by simulation. The normalized error denoting the measurement accuracy becomes worse when the pulse width ratio becomes larger, whereas it keeps relatively stable when various overlapping-free frequency differences are applied. In the experiment, temporal measurement of an actively mode-locked laser with ∼10-picosecond duration at a repetition frequency of 20.095 GHz is demonstrated, verifying the simulation analysis.
出版源：IEEE Photonics Technology Letters, VOL. 31, NO. 8, Apr. 2019.