Carbon nanohorn dahlia aggregates with a lateral size of hundreds of nanometers and a height of a few nanometers were prepared utilizing commercial carbon nanohorn powder. In the mid-infrared spectral region (@ 2845 nm), the saturable absorption property of the carbon nanohorn was experimentally investigated. It was employed as a saturable absorber in a Er:Lu₂O₃ laser. Laser pulses with a shortest pulse duration of 255 ns were yielded at a repetition rate of 149 kHz under the maximum pump power of 6.5 W. To the best of our knowledge, this is the first time that the saturable absorption property of carbon nanohorn was investigated and pulsed lasers were generated with YAG-based CNH in the mid-infrared. Our investigation indicates that carbon nanohorn exhibits a comparable nonlinear optical performance to carbon nanotube in the mid-infrared region. Further investigation of mid-infrared mode-locking lasers can be realized with carbon nanohorn by decreasing the thickness of the carbon nanohorn.

中文翻译：

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碳纳米角调制纳秒中红外激光器

利用商业碳纳米角粉末制备了横向尺寸为数百纳米、高度为几纳米的碳纳米角大丽花聚集体。在中红外光谱区（@ 2845 nm），实验研究了碳纳米角的可饱和吸收特性。在 Er:Lu ₂ O _{3 中}用作饱和吸收剂激光。在 6.5 W 的最大泵浦功率下，以 149 kHz 的重复频率产生最短脉冲持续时间为 255 ns 的激光脉冲。 据我们所知，这是第一次研究碳纳米角的饱和吸收特性和脉冲激光是用基于 YAG 的 CNH 在中红外产生的。我们的研究表明，碳纳米角在中红外区域表现出与碳纳米管相当的非线性光学性能。通过减少碳纳米角的厚度，可以使用碳纳米角实现对中红外锁模激光器的进一步研究。