因此，SESAM除了其量子阱材料的可饱和吸收效应能启动锁模外，本身的负克尔效应也有助于锁模的自启动。

These reveal that the negative Kerr effect of the SESAM can contribute to the self-starting of mode-locked lasers besides the saturable absorption mechanism.

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这说明SESAM的可饱和吸收机理具有锁模自启动效应外，其负克尔效应也有助于锁模的自启动。

This shows that the negative Kerr effect of the SESAM can contribute to the self-starting of the modelocked laser besides the saturable absorption mechanism.

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理论分析了利用非线性偏振旋转效应锁模激光器的机理。

The physical mechanism of nonlinear polarization rotation mode-locking was analyzed in theory.

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