Gold nanorods as saturable absorbers for the passively Q-switched Nd:LLF laser at 1.34 μm |
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作者姓名: | 钱启璋 王南 赵圣之 李桂秋 李涛 李德春 杨克建 臧婕 马厚义 |
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基金项目: | supported by the Natural Science Foundation of Shandong Province,China(No.ZR2018MF033) |
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摘 要: | Gold nanorods(GNRs) with two different aspect ratios were successfully utilized as saturable absorbers(SAs) in a passively Q-switched neodymium-doped lutetium lithium fluoride(Nd:LLF) laser emitting at 1.34 μm. Based on the GNRs with an aspect ratio of five, a maximum output power of 1.432 W was achieved, and the narrowest pulse width was 328 ns with a repetition rate of 200 kHz. But, in the case of the GNRs with the aspect ratio of eight, a maximum output power of 1.247 W was achieved, and the narrowest pulse width was 271 ns with a repetition rate of 218 kHz. Our experimental results reveal that the aspect ratios of GNRs have different saturable absorption effects at a specific wavelength. In other words, for passively Q-switched lasers at a given wavelength, we are able to select the most suitable GNRs as an SA by changing their aspect ratio.
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关 键 词: | EXPERIMENTAL ASPECT effects PULSE was MOST OUR NS |
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