The principle of intracavity laser absorption and the relationship between gas concentration and the laser build-up time is outlined.

介绍了掺铒光纤激光器内腔吸收谱的基本原理，以及激光激射延迟时间与气体浓度的关系。

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Then, the paper deals with the effect of the diffraction efficiency variation rate on the time required for the laser pulse to build up and the shape of the pulse.

本文还讨论了衍射效率变化速率对输出脉冲的建立时间以及脉冲形状的影响。

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