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首页> 外文会议>International Conference on Infrared, Millinmeter, and Terahertz Waves >Generation of 4 THz radiation from Lithium-Niobate Off-axis THz Parametric Oscillator
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Generation of 4 THz radiation from Lithium-Niobate Off-axis THz Parametric Oscillator

机译：从锂 - 铌酸锂脱轴THz参数振荡器产生4 ZHz辐射

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摘要

Stimulated polariton scattering in lithium niobate is an effective means to generate the THz radiations. All the previously reported THz SPS from LN shows a stand-alone gain peak about 2 THz, resulting from the lowest A1-symmetry vibration mode near 250 cm-1. Generation of THz radiation from lithium niobate with frequencies higher than 2.5 THz has been considered difficult due to sharply increased material absorption. Since lithium niobate is relatively low-cost and high-quality, it is desirable to extend the useful THz radiation bandwidth of LN to higher frequencies. By using the so-called off-axis THz parametric oscillator, we report the discovery of a phase-matched gain peak near 4 THz from lithium niobate. We also demonstrated a signal-seeded lithium-niobate off-axis THz parametric oscillator that generates 1.4 nJ pulse energy at 4 THz with 17.5 mJ pump energy at 1064 nm.
机译：在铌酸锂中刺激的极性散射是产生THz辐射的有效手段。来自LN的所有先前报告的THz SPS显示了大约2至THz的独立增益峰，由最低的a导致 1 -MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMETRY振动模式近250厘米 -1 。由于材料吸收急剧增加，由于高于2.5 ZHz的频率，从铌酸锂的辐射产生辐射。由于铌酸锂是相对低成本和高质量的，因此希望将LN的有用的THz辐射带宽扩展到更高的频率。通过使用所谓的离轴THz参数振荡器，我们报告了从铌酸锂的4至THz附近的相匹配增益峰的发现。我们还展示了一种信号播种锂 - 铌酸锂偏离轴参数振荡器，可在4至4至4至4至4至7至50mm处产生1.4 NJ脉冲能量。

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