We generated Q-switched and mode-locked pulses by making use of the saturable absorption characteristic of scandium oxide (Sc₂O₃) film, which was obtained by embedding Sc₂O₃ nanopowders into polyvinyl alcohol film. The Q-switched laser operated at center wavelength of 1560.5 nm with the maximum pulse energy of 65.6 nJ and 4.4% slope efficiency. With the addition of a 200 m extra single-mode fiber in the ring cavity, a self-starting mode-locked EDFL was implemented. The mode-locked pulses operated at a central wavelength of 1565.4 nm with a repetition rate of 1.0 MHz and a pulse duration of 3.50 ps.

中文翻译：

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Sc2O3 PVA薄膜，用于掺Er光纤激光腔中的开关和锁模

我们利用氧化Sc（Sc ₂ O ₃）膜的饱和吸收特性生成了Q开关和锁模脉冲，该特性是通过将Sc ₂ O ₃纳米粉末嵌入聚乙烯醇膜中获得的。调Q激光器以1560.5 nm的中心波长工作，最大脉冲能量为65.6 nJ，斜率效率为4.4％。通过在环形腔中添加200 m额外的单模光纤，实现了自启动锁模EDFL。锁模脉冲以1565.4 nm的中心波长工作，重复频率为1.0 MHz，脉冲持续时间为3.50 ps。