基于Fe2+:ZnSe微米粉末嵌入ZBLAN玻璃的4.32 μm中红外随机激光
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国家自然科学基金项目(No.11574221)资助


4.32 μm mid-infrared random lasing based on ZBLAN glass containing micro-sized Fe2+:ZnSe powder
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    摘要:

    在室温下制备了基于Fe2+:ZnSe微米粉末嵌入ZBLAN(ZrF4-BaF2-LaF3-AlF3-NaF)玻璃的中红外随机激光器,随机激光的中心波长约为4.32μm。Fe2+:ZnSe微米粉末的平均晶粒尺寸为3.54 μm,XRD结果表明Fe2+:ZnSe微米粉末为立方闪锌矿结构。在2.94 μm纳秒脉冲激光泵浦下,随机激光的阈值为557.89 mJ/cm2。随着泵浦能量的增加,随机激光多纵模的特点也随之出现。泵浦能量超过阈值后,随机激光的光谱线宽为10 nm,脉冲宽度为50 ns。这项工作为获得稳定的中红外激光源提供了一种简单而经济的方法,将粉末嵌入固体基质中可以对粉末起到稳定的作用,这种方法在制备中红外光子器件和光纤激光器上具有潜在前景。

    Abstract:

    Mid-infrared random laser based on Fe2+ doped ZnSe powders embedded in ZBLAN glass with a center wavelength at ~4.32 μm is developed at room temperature.The average grain size of micro-sized Fe2+:ZnSe powder is 3.54 μm,and the XRD results indicated that the micro-sized Fe2+:ZnSe powders are of cubic zinc blende structure.The threshold of the random laser is 557.89 mJ/cm2 under the 2.94 μm nanosecond pulse laser.The characteristic of the multi-longitudinal mode of random laser appears with the increasing of pump energy.As the pump energy increases until it exceeds the threshold,the random laser has a narrow spectral line-width of 10 nm,and the steady pulse width drops to 50 ns.This work provides a simple and cost-effective way to obtain stable mid-IR laser source.Embedding powders into solid host can be an appropriate method to stabilize powders,especially for middle-infrared lasing powders,which have the potential use for fabricating middle-infrared photonic devices and fiber laser.

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邓丽娟,冯国英,张弘,戴深宇.基于Fe2+:ZnSe微米粉末嵌入ZBLAN玻璃的4.32 μm中红外随机激光[J].激光与红外,2019,49(7):849~854
DENG Li-juan, FENG Guo-ying, ZHANG Hong, DAI Shen-yu.4.32 μm mid-infrared random lasing based on ZBLAN glass containing micro-sized Fe2+:ZnSe powder[J]. LASER & INFRARED,2019,49(7):849~854

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  • 在线发布日期: 2019-12-03
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