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实验与理论研究了外光注入种子脉冲有效压缩增益开关DFB激光器光谱线宽的注入时间窗口.发现只有在增益开关光脉冲建立之前约100ps的时间窗口内,注入种子脉冲方可以有效压缩增益开关DFB半导体激光器光谱线宽,并且线宽随着注入光强度的增加而减小,可产生低啁啾的近变换极限的超短光脉冲.实验证实,在此时间窗口内注入种子脉冲,增益开关DFB激光器的光谱线宽从0·46nm压缩至0·08nm,时间带宽积从2·46降低至0·70.同时理论研究了增益开关DFB半导体激光器的光谱线宽压缩与种子脉冲的注入时间及强度的关系.
Experimental and theoretical study of injection time window of extra-light injection seed pulse effective compression gain switch DFB laser linewidth found that only within the time window of about 100ps before the gain switching light pulse is established, the injection of the seed pulse can effectively compress the gain switch DFB The semiconductor laser has a wide spectral line and the line width decreases with the increase of the intensity of the injected light, resulting in an ultrashort optical pulse with a low chirp near conversion limit. Experiments confirm that the seed pulse, the gain switch DFB The bandwidth of the laser was reduced from 0.46nm to 0.08nm, and the time-bandwidth product was reduced from 2.46 to 0.70. Meanwhile, the theoretical analysis of the spectral linewidth compression and pulse injection time and intensity of the DFB semiconductor laser Relationship.