Filatova Serafima A, Kamynin Vladimir A, Gladush Yuriy G, Krasnikov Dmitry V, Nasibulin Albert G, Tsvetkov Vladimir B
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia.
Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel Str., 121205 Moscow, Russia.
Nanomaterials (Basel). 2023 May 9;13(10):1581. doi: 10.3390/nano13101581.
We propose a simple dumbbell-shaped scheme of a Holmium-doped fiber laser incorporating a minimum number of optical elements. Mode-locking regimes were realized with the help of polymer-free single-walled carbon nanotubes (SWCNTs) synthesized using an aerosol (floating catalyst) CVD method. We show that such a laser scheme is structurally simple and more efficient than a conventional one using a ring cavity and a similar set of optical elements. In addition, we investigated the effect of SWCNT film transmittance, defined by the number of 40 nm SWCNT layers on the laser's performance: operating regimes, stability, and self-starting. We found that three SWCNT layers with an initial transmittance of about 40% allow stable self-starting soliton mode-locking at a wavelength of 2076 nm with a single pulse energy of 0.6 nJ and a signal-to-noise ratio of more than 60 dB to be achieved.
我们提出了一种简单的哑铃形掺钬光纤激光器方案，该方案包含最少数量的光学元件。利用气溶胶（浮动催化剂）化学气相沉积法合成的无聚合物单壁碳纳米管（SWCNTs）实现了锁模状态。我们表明，这种激光方案在结构上简单，并且比使用环形腔和类似光学元件组的传统方案更高效。此外，我们研究了由40 nm SWCNT层数定义的SWCNT薄膜透过率对激光器性能的影响：工作状态、稳定性和自启动。我们发现，初始透过率约为40%的三层SWCNT能够在2076 nm波长处实现稳定的自启动孤子锁模，单脉冲能量为0.6 nJ，信噪比超过60 dB。
