A femtosecond pulse fiber laser at 1935 nm using a bulk-structured Bi2Te3 topological insulator
A femtosecond pulse fiber laser at 1935 nm using a bulk-structured Bi2Te3 topological insulator
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DOI：
10.1364/oe.22.007865
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发表时间：
2014-04-07
期刊：
影响因子：
3.8
通讯作者：
Lee, Ju Han
中科院分区：
文献类型：
--
作者：
Jung, Minwan;Lee, Junsu;Lee, Ju Han
我们实验证明了飞秒锁模，全光纤化激光器，在2 μ m的区域，并采用了基于块状结构的碲化铋（Bi 2 Te 3）拓扑绝缘体（TI）的可饱和吸收体。我们的纤维化的可饱和吸收体是通过沉积一个机械剥离，类似于30 μ m厚的Bi 2 Te 3 TI层上的侧面抛光的光纤平台。通过拉曼和X射线光电子能谱测量证实了所制备的Bi 2 Te 3层的体晶结构。所制备的可饱和吸收体的调制深度被测量为类似于20.6%。使用可饱和吸收体，它表明，稳定的，超快脉冲的时间宽度类似于795 fs可以很容易地产生在1935 nm的波长从铥/钬共掺光纤环形腔。这个实验证明，散装结构，TI为基础的可饱和吸收体可以很容易地用作2 μ m激光器的超快锁模。(C)2014年美国光学学会
We experimentally demonstrate a femtosecond mode-locked, all-fiberized laser that operates in the 2 mu m region and that incorporates a saturable absorber based on a bulk-structured bismuth telluride (Bi2Te3) topological insulator (TI). Our fiberized saturable absorber was prepared by depositing a mechanically exfoliated, similar to 30 mu m-thick Bi2Te3 TI layer on a side-polished optical fiber platform. The bulk crystalline structure of the prepared Bi2Te3 layer was confirmed by Raman and X-ray photoelectron spectroscopy measurements. The modulation depth of the prepared saturable absorber was measured to be similar to 20.6%. Using the saturable absorber, it is shown that stable, ultrafast pulses with a temporal width of similar to 795 fs could readily be generated at a wavelength of 1935 nm from a thulium/holmium co-doped fiber ring cavity. This experimental demonstration confirms that bulk structured, TI-based saturable absorbers can readily be used as an ultra-fast mode-locker for 2 mu m lasers. (C) 2014 Optical Society of America