ABSTRACT Q-switched and mode-locked pulse generation in Erbium-doped fiber lasers (EDFLs) are demonstrated using Poly [2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) organic semiconductor material as a saturable absorber (SA) for the first time. The MEH-PPV was prepared in the form of a thin film having a modulation depth of 12% and saturation intensity of 40 MW/cm2. The SA was placed in a laser cavity to produce a stable Q-switched operating at 1564.0 nm. The maximum repetition rate of 78.62 kHz, minimum pulse width of 3.54 µs and maximum pulse energy of 59.45 nJ were attained at 125.2 mW pump power. On the other hand, by incorporating an additional 100 m long single mode fiber, the mode locked EDFL self-started as the pump power was raised above 125.2 mW. The soliton pulse was obtained due to the enhancement of the nonlinearity in the cavity. The mode-locked laser operated at 1568.5 nm with a fixed repetition rate of 1.859 MHz and pulse width of 2.97 ps.

中文翻译：

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MEH-PPV 有机材料用作 Q 开关和锁模应用的可饱和吸收体

摘要 使用聚 [2-甲氧基-5-(2-乙基己氧基)-1,4-亚苯基亚乙烯基] (MEH-PPV) 有机半导体材料在掺铒光纤激光器 (EDFL) 中产生调Q 和锁模脉冲首次作为可饱和吸收体 (SA)。MEH-PPV 制备成具有 12% 调制深度和 40 MW/cm2 饱和强度的薄膜形式。SA 被放置在激光腔中以产生稳定的 Q 开关操作在 1564.0 nm。在 125.2 mW 泵浦功率下获得了 78.62 kHz 的最大重复率、3.54 µs 的最小脉冲宽度和 59.45 nJ 的最大脉冲能量。另一方面，通过加入额外的 100 m 长单模光纤，当泵浦功率提高到 125.2 mW 以上时，锁模 EDFL 自启动。由于腔中非线性的增强，获得了孤子脉冲。锁模激光器工作在 1568.5 nm，固定重复率为 1.859 MHz，脉冲宽度为 2.97 ps。