The authors experimentally demonstrated the generation of mode-locked pulses from all-fibre erbium-doped fibre laser cavity by using organic material, Alq ₃ , as a saturable absorber (SA). The SA film was integrated into a ring fibre laser cavity to act as a mode-locker. A mode-locking operation was achieved in three different experiments with pulse width/repetition rate of 1.26 ps/3.36 MHz, 970 fs/3.36 MHz and 820 fs/4.9 MHz by using cavity length/optical coupler (OC) of 61.5 m/80:20 OC, 61.5 m /95:5 OC and 42 m/80:20 OC, respectively. All the experiments produced a soliton and a very stable mode-locking operation at central wavelength of ∼1561 nm. The experiments confirmed that organic material can readily be used as SA for a mode-locked operation in the 1.5 μm region. This demonstration might shed new insights into the potentials and techniques for developing ultrafast fibre lasers by using organic materials as SAs.

中文翻译：

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飞秒锁模掺Alq ₃饱和吸收器的光纤激光器

作者通过实验证明了使用有机材料Alq ₃从全光纤掺fiber光纤激光器腔中产生锁模脉冲。 ，作为可饱和吸收体（SA）。SA膜被集成到环形光纤激光腔中，用作锁模器。通过使用61.5 m / 80的腔长/光耦合器（OC），在三个不同的实验中实现了锁模操作，脉冲宽度/重复频率分别为1.26 ps / 3.36 MHz，970 fs / 3.36 MHz和820 fs / 4.9 MHz ：20 OC，61.5 m / 95：5 OC和42 m / 80：20 OC。所有实验在中心波长〜1561 nm处产生孤子和非常稳定的锁模操作。实验证实，有机材料可以轻松用作1.5μm区域锁模操作的SA。该演示可能会为使用有机材料作为SA来开发超快光纤激光器的潜力和技术提供新的见解。