本文给出了在环形光纤外腔光反馈之下半导体激光器频偏特性的小信号分析理论。
In this paper a complete small signal analysis for semiconductor laser frequency chirping in the presence of optical fiber ring feedback is presented.
采用脉宽调制型控制方法，对采集到的电流信号进行负反馈，通过PI调节控制脉宽调制专用芯片sg3525的输出，以达到控制焊机外特性的目的。
Acquired current signal were inverse feed backed with PWM, then, output of the chip SG3525 were controlled through PI regulator. As a result, the external characteristic was controlled.
采用脉宽调制型控制方法，对采集到的电流信号进行负反馈，通过PI调节控制脉宽调制专用芯片sg3525的输出，以达到控制焊机外特性的目的。
Acquired current signal were inverse feed backed with PWM, then, output of the chip SG3525 were controlled through PI regulator. As a result, the external characteristic was controlled.
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