We report on experimental observation of four phase-locked bound soliton formation in a SESAM mode-locked \(\hbox {Cr}^{2+}\):ZnSe laser with an output power of 20 mW, a temporal pulse-to-pulse separation of 18.2 ps and single pulse duration of 1.4 ps. We demonstrate that birefringence can be used as an efficient mechanism to achieve bound state generation in solid-state lasers as an alternative method to Kerr-lens and SESAM saturation by a pump power increase or a total net cavity dispersion variation. In this work, we consider two different setup configurations to demonstrate the birefringence influence on bound soliton formation. The suggested technique could be effectively used in the realization of mode-locked lasers based on solid-state active media operating in bound-state or multi-bound regimes.

我们报告了在SESAM锁模\（\ hbox {Cr} ^ {2 +} \）：ZnSe激光器中四个锁相束缚孤子形成的实验观察，该激光器的输出功率为20 mW，瞬时脉冲至脉冲间隔为18.2 ps，单脉冲持续时间为1.4 ps。我们证明了双折射可以用作在固态激光器中实现束缚态生成的有效机制，作为通过泵浦功率增加或总净腔色散变化来替代Kerr-lens和SESAM饱和的方法。在这项工作中，我们考虑了两种不同的设置配置，以证明双折射对束缚孤子形成的影响。所建议的技术可以有效地用于基于在绑定状态或多绑定状态下工作的固态有源介质的锁模激光器的实现。