Abstract The single-wall carbon nanotubes (SWCNTs) with the specific chirality (6, 5) and (7, 5) were sorted out by the density gradient ultracentrifugation (DGU) method. 2D photoluminescence excitation–emission map and the Raman spectrum confirmed the successful chirality-selection. The nonlinear optical performance of the chirality-selected SWCNTs was investigated by an open-aperture Z-scan setup. By employing the prepared SWCNTs saturable absorber (SWCNTs-SA), the minimum pulse duration of 115 ns with a pulse repetition rate of 550 kHz was obtained in the passively Q-switched (PQS) laser operation.

中文翻译：

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N-CS 选择具有特定手性 SWCNT 作为 1μm 可饱和吸收体的被动调Q激光器

摘要 采用密度梯度超速离心法(DGU) 筛选出具有特定手性(6, 5) 和(7, 5) 的单壁碳纳米管(SWCNTs)。二维光致发光激发-发射图和拉曼光谱证实了成功的手性选择。通过开放孔径 Z 扫描设置研究了手性选择的 SWCNT 的非线性光学性能。通过使用制备的 SWCNTs 可饱和吸收体 (SWCNTs-SA)，在被动调 Q (PQS) 激光器操作中获得了 115 ns 的最小脉冲持续时间和 550 kHz 的脉冲重复率。