光回馈调制了激光器不同纵模的阈值增益，阈值增益最低的纵模获得振荡。
The threshold gains of different longitudinal modes are modulated by optical feedback. The mode which has the lowest threshold gain can oscillate.
它们可以用来得到较大输出能量的单纵模激光器和激光器的新的调制方法。
The results obtained in our work can be used in construction of a single longitudinal mode laser with enhance output and to suggest a new method of modulation for lasers.
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