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Q-switched ytterbium-doped fiber laser with topological insulator-based saturable absorber

机译:基于拓扑绝缘体的可饱和吸收体的Q开关掺-光纤激光器

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摘要

A stable passive Q-switched ytterbium-doped fiber laser (YDFL) operating at 1057.4 and 1044.5 nm is demonstrated using two types of topological insulator-based saturable absorbers (SAs): bismuth (III) selenide (Bi_2Se_3) and bismuth (Ⅲ) telluride (Bi_2Te_3). These materials are embedded in polyvinyl alcohol film and incorporated in the YDFL cavity. Using Bi_2Se_3 SA, the YDFL obtains a stable train of pulses with a repetition rate that is tunable from 48.83 to 102 kHz. Meanwhile, the corresponding pulse width decreases from 8.9 to 3.48 μs as the pump power increases from 67.6 to 88.3 mW. For the Bi_2Te_3-based Q-switched YDFL, the repetition rate grows from 43.25 to 93.63 kHz and the pulse width shrinks from 5.65 to 2.01 as the 980-nm pump power rises from 72.8 to 98.4 mW. The maximum pulse energy is obtained with the Bi_2Te_3 SA at 29.95 nJ.
机译:使用两种基于拓扑绝缘体的可饱和吸收体(SAs),证明了一种稳定的无源Q开关掺do光纤激光器(YDFL),其工作于1057.4和1044.5 nm,它们是:铋(III)硒化物(Bi_2Se_3)和碲化铋(III) (Bi_2Te_3)。这些材料嵌入聚乙烯醇薄膜中,并并入YDFL空腔中。使用Bi_2Se_3 SA,YDFL获得了稳定的脉冲序列,其重复率可从48.83调整到102 kHz。同时,随着泵浦功率从67.6 mW增加到88.3 mW,相应的脉冲宽度从8.9减小到3.48μs。对于基于Bi_2Te_3的Q开关YDFL,随着980 nm泵浦功率从72.8 mW增大到92.8 mW,重复频率从43.25 kHz增大到93.63 kHz,脉冲宽度从5.65减小到2.01。使用Bi_2Te_3 SA在29.95 nJ下获得最大脉冲能量。

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