Use of hollow-core fibers to deliver nanosecond Nd:YAG laser pulses to form sparks in gases.
Use of hollow-core fibers to deliver nanosecond Nd:YAG laser pulses to form sparks in gases.
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DOI：
10.1364/ol.30.002083
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发表时间：
2005-08
期刊：
影响因子：
3.6
通讯作者：
A. Yalin;M. Defoort;B. Willson;Y. Matsuura;M. Miyagi
中科院分区：
文献类型：
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作者：
A. Yalin;M. Defoort;B. Willson;Y. Matsuura;M. Miyagi
我们报告什么是我们所知的第一个交付纳秒激光脉冲通过柔性光纤产生的大气压气体中的光火花。我们的工作采用Nd：YAG激光束（1.064微米）通过环烯烃聚合物涂层银中空纤维。我们研究了光纤出口处的光束特性作为光纤发射几何形状的函数。我们发现，对于低角度发射（大约0.01弧度半角度），出射光束具有相对高的光学强度（大约2GW/cm 2）和低的光发散度（大约0.01弧度半角度），并且允许下游火花形成。还研究了光纤弯曲对出射光束和产生火花的能力的影响。
We report what is to our knowledge the first delivery of nanosecond laser pulses through flexible fibers to produce optical sparks in atmospheric-pressure gases. Our work employs a Nd:YAG laser beam (1.064 microm) delivered through a cyclic olefin polymer-coated silver hollow fiber. We studied the beam properties at the fiber exit as a function of the fiber launch geometry. We found that for a low-angle launch (approximately 0.01 rad half-angle), the exit beam has relatively high optical intensity (approximately 2 GW/cm2) and low light divergence (approximately 0.01 rad half-angle) and allows downstream spark formation. The effect of fiber bending on the exit beam and on the ability to make sparks is also investigated.