当增加重复频率时，输出与泵浦激光重复频率完全一致的激光脉冲，但也将在一个泵浦脉宽中出现多个激光脉冲输出。
Increasing the repetition rate, the output laser has the same repetition rate as the pump laser, but more sub-pulses will be output in one pump pulse.
脉冲激光焊接镁合金时应遵循较大脉宽、低频率、中等峰值功率的原则。
Wider pulse width, low pulse frequency and medium peak power should be used when pulse laser welds magnesium Alloy.
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