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作 者: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 Pan Wei;Chen Hualong;Wan Tiebin;Zhang Hongwei;Jin Liang;Zhang He;Xu Yingtian;Zou Yonggang;Shi Linlin;Ma Xiaohui(National Key Laboratory on High Power Semiconductor Laser,Changchun University of Science and Technology,Changchun 130022,China)
机构地区:[1]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
出 处:《红外与激光工程》2020年第8期105-111,共7页Infrared and Laser Engineering
基 金:吉林省教育厅创新基金(JJKH20181112K);长春理工大学创新基金(XJJLG-2017-08)。
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1560 nm、脉冲宽度为8μs,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。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:Bi2 Te3 with different concentrations was made through experiments.The influence of Ti:Bi2 Te3 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 Bi2 Te3 was obtained.Finally,the Ti:Bi2 Te3 concentration was optimized for the resonator parameters.When the pump power is 71 mW,the central wavelength is 1560 nm,the pulse width is 8μs,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.
关 键 词:光纤激光器 被动调Q 水热合成 Bi2Te3可饱和吸收体
分 类 号:TN248[电子电信—物理电子学]
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