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饱和吸收体
[光] saturable absorber
- 在理论上分析了利用非线性光学环形镜作为等效可饱和吸收体压缩脉冲进行锁模的物理机制。
The advantages of using NOLM as saturable absorber to compress pulse in mode-locked fiber lasers are analyzed theoretically. - 减小饱和吸收体的初始透过率能有效提高脉冲能量，并压缩脉宽，但是会增加阈值泵浦功率；
Decreasing initial transmission of the saturable absorber can cause pulse energy increase, pulse duration decrease and the threshold pump power increase respectively. - 从钛宝石激光器的克尔透镜锁模原理出发，基于晶体内激光和泵浦激光耦合情况随腔内功率变化这一事实，给出了克尔透镜锁模过程中类可饱和吸收体的表达式；
Base on the principle of Kerr lens mode locking and the fact that the coupling between the laser and pump in the crystal varies with the power, the absorber-like equation is derived.
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