| 不同浓度Ti:Bi2Te3的调Q光纤激光器 |
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| 引用本文： | 潘伟,陈华龙,王铁斌,张宏伟,金亮,张贺,徐英添,邹永刚,石琳琳,马晓辉.不同浓度Ti:Bi2Te3的调Q光纤激光器[J].红外与激光工程,2020,49(8):20190542-1-20190542-7. |
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| 作者姓名： | 潘伟 陈华龙 王铁斌 张宏伟 金亮 张贺 徐英添 邹永刚 石琳琳 马晓辉 |
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| 作者单位： | 长春理工大学 高功率半导体激光国家重点实验室，吉林 长春 130022 |
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| 基金项目： | 长春理工大学创新基金;吉林省教育厅创新基金 |
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| 摘 要： | 基于二维材料的非线性光开关是调Q光纤激光器的核心器件，二维材料光开关的浓度会直接影响其非线性光学吸收特性，从而改变脉冲的时域特性。因此，针对二维材料浓度对调Q光脉冲的影响进行了研究，并通过实验制作了基于不同浓度Ti: Bi2Te3可饱和吸收光开关，分析了Ti: Bi2Te3浓度对非线性光学吸收特性的影响，获得了调Q光脉冲的调制深度、脉冲宽度、重复频率和单脉冲能量随不同浓度Bi2Te3的变化关系。最终，针对谐振腔参数对Ti:Bi2Te3浓度进行优化，在泵浦功率为71 mW时，获得了中心波长为1 560 nm、脉冲宽度为8 μs，重复频率为14.2 kHz、平均输出功率2.15 mW、对应单脉冲能量为151.4 nJ的脉冲输出。
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| 关 键 词： | 光纤激光器 被动调Q 水热合成 Bi2Te3可饱和吸收体 |
| 收稿时间： | 2019-11-03 |
Q-switched fiber laser with Ti: Bi2Te3 of different concentrations |
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| Affiliation: | National Key Laboratory on High Power Semiconductor Laser, Changchun University of Science and Technology, Changchun 130022, China |
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| Abstract: | Nonlinear optical switch based on two-dimensional material is the core device of Q-switched fiber laser. The concentration of two-dimensional material optical switch will directly affect its nonlinear optical absorption characteristics, thus change the time-domain characteristics of the pulse. Therefore, the influence of two-dimensional material concentration on Q-switched optical pulse was studied, and a saturable absorption optical switch based on Ti: Bi2Te3 with different concentrations was made through experiments. The influence of Ti: Bi2Te3 concentration on nonlinear optical absorption characteristics was analyzed, and the relationship among the modulation depth, pulse width, repetition frequency and single pulse energy of Q-switched optical pulse with different concentrations Bi2Te3 was obtained. Finally, the Ti:Bi2Te3 concentration was optimized for the resonator parameters. When the pump power is 71 mW, the central wavelength is 1 560 nm, the pulse width is 8 μs, the repetition frequency is 14.2 kHz, the average output power is 2.15 mW, and the corresponding single pulse energy is 151.4 nJ. |
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