Abstract In our work, the ferromagnetic insulator (FI) Cr2Ge2Te6 was utilized as a saturable absorber (SA) successfully to demonstrate Er-doped fiber laser. Its modulation depth is 6.24%, and saturable intensity is 7.58 MW/cm2. Based on the SA which was prepared by mixing CGT with polyvinyl alcohol (PVA), stable dark-bright-bright solitons with a threshold power of 110 mW at the fundamental frequency of 5.64 MHz were acquired for the first time. Our results suggest that CGT is an efficient SA candidate for demonstrating dark-bright-bright soliton fiber lasers because of excellent nonlinear optical characteristics.

中文翻译：

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基于铁磁绝缘体Cr2Ge2Te6的掺铒光纤激光器暗-亮-亮孤子的产生

摘要 在我们的工作中，铁磁绝缘体 (FI) Cr2Ge2Te6 被成功地用作可饱和吸收体 (SA) 来演示掺铒光纤激光器。其调制深度为 6.24%，饱和强度为 7.58 MW/cm2。基于 CGT 与聚乙烯醇 (PVA) 混合制备的 SA，首次获得了稳定的暗-亮-亮孤子，其阈值功率为 110 mW，基频为 5.64 MHz。我们的结果表明，CGT 是展示暗-亮-亮孤子光纤激光器的有效 SA 候选者，因为它具有出色的非线性光学特性。