To establish the operating characteristics of a saturable absorber mirror (SESAM)-assisted mode-locked laser oscillator depending on the location of the SESAM, we designed a laser oscillator with the SESAM toward the middle of the cavity. We then compared it with a conventional laser oscillator that has the SESAM at the end of the cavity. The characteristics of the mode-locked pulses generated from each laser oscillator were studied along with the effective loss and wavelength-dependent loss of the SESAM, and the stability criterion against cw generation (positive group-delay dispersion (GDD) regime) and soliton dynamics (negative GDD regime). We demonstrate that no spatial chirp occurs in an output beam generated from the designed laser oscillator unlike the conventional laser oscillator when a prism pair is used for intracavity dispersion compensation. Furthermore, we applied the configuration to a Herriott-multipass cavity laser oscillator, which delivers sub-μJ pulse energy.

为了根据SESAM的位置建立可饱和吸收镜（SESAM）辅助锁模激光振荡器的工作特性，我们设计了一种激光振荡器，其SESAM朝向腔体的中部。然后，我们将其与在腔体末端具有SESAM的常规激光振荡器进行了比较。研究了每个激光振荡器产生的锁模脉冲的特性，以及SESAM的有效损耗和与波长有关的损耗，以及针对cw生成（正群时延色散（GDD）体制）和孤子动力学的稳定性判据。 （负GDD机制）。我们证明，当棱镜对用于腔内色散补偿时，不同于传统的激光振荡器，在设计的激光振荡器产生的输出光束中不会发生空间spatial。此外，我们将该配置应用于Herriott多通腔激光振荡器，该振荡器可提供低于μJ的脉冲能量。