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提出了一种基于光纤分数塔尔博特(Talbot)效应的光脉冲序列的倍频方法,介绍了Talbot效应的基本原理;应用自制的可调色散补偿器,将光纤锁模激光器产生的重复频率为10 GHz、脉宽约2.8 ps的窄脉冲序列倍频到重复频率为20,40和50 GHz的脉冲序列,也将重复频率5 GHz的窄脉冲序列经8倍频变换得到40 GHz的脉冲序列;通过分析窄脉冲序列的频谱,指出了实验中倍频得到的40 GHz和50 GHz脉冲质量下降的原因,提出了相应的优化措施。
A frequency doubling method based on the Talbot effect of fiber fraction is proposed. The basic principle of Talbot effect is introduced. By using the self-made tunable dispersion compensator, the fiber mode-locked laser repetition The narrow pulse sequence with a frequency of 10 GHz and a pulse width of about 2.8 ps is multiplied to a pulse sequence with repetition frequencies of 20, 40 and 50 GHz. The narrow pulse sequence with a repetition frequency of 5 GHz is also frequency-converted by 8-fold to obtain a 40 GHz pulse By analyzing the spectrum of the narrow pulse sequence, the reasons for the dipole pulse quality degradation at 40 GHz and 50 GHz in the experiment are pointed out and the corresponding optimization measures are proposed.