Based on the analysis of the process of regenerative braking, this paper put forward a new method to restrain the pumping voltage by changing PWM ratio.

文中通过对再生制动过程的分析，提出了通过控制占空比的办法来抑制泵升电压。

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The results show that higher injected current can restrain the frequency chirp effectively, and higher input optical power can also do that, meanwhile, good extinction ratio is ensured.

研究发现，较大的激光器注入电流可以有效地抑制频率啁啾，较高的注入信号光功率则可以在保证高转换信号消光比的同时抑制频率啁啾。

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