Temporally stretched Q-switched pulses in the 2 μm spectral range
Temporally stretched Q-switched pulses in the 2 μm spectral range
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2 μm 光谱范围内的时间拉伸 Q 开关脉冲
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
R. Brinkmann
中科院分区：
文献类型：
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作者：
I. Rohde;D. Theisen;R. Brinkmann
为了对调Q脉冲进行时间展宽，设计了一台λ=1920 nm的纵向带内抽运的调Q Ho：YAG光激光器。这是通过两种不同的方法实现的：(A)选择了小截面的受激发射波长，这使得在2128 nm处的脉冲宽度为162 ns，而在2098 nm处的脉冲宽度为32 ns，能量约为1 mJ；(B)此外，在过耦合区域中的内腔二次谐波产生被用来进一步增加在1 mJ处的脉冲宽度至300 ns。
A Q-switched Ho:YAG laser, longitudinally in-band pumped by a thulium fiber laser at a wavelength of λ = 1920 nm was designed in order to temporally stretch the Q-switched pulses at the fundamental wavelength. This was realized by two different methods: (a) wavelengths with a small cross section for stimulated emission have been selected, which leads to a pulse duration of 162 ns at 2128 nm compared to 32 ns at a wavelength of 2098 nm with energies around 1 mJ, (b) additionally intracavity second harmonic generation in the overcoupling regime has been used to further increase the pulse duration up to 300 ns at 1 mJ.