光学学报, 2018, 38 (11): 1119001, 网络出版: 2019-05-09
基于MgO∶SLN晶体的环形腔太赫兹参量振荡器 
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Ring-Cavity Terahertz Parametric Oscillator Based on MgO∶SLN Crystals
非线性光学 太赫兹波 环形腔太赫兹参量振荡器 受激电磁耦子 nonlinear optics terahertz wave ring-cavity terahertz wave parametric oscillator polariton
摘要
基于摩尔分数为1%的氧化镁掺杂的近化学计量比铌酸锂晶体,采用环形腔结构的浅表垂直出射方式组成太赫兹波参量振荡器。该振荡器的太赫兹波输出调谐范围为0.99~3.84 THz,频率调谐响应时间为600 μs。当抽运能量为150.30 mJ、太赫兹频率为1.59 THz时,太赫兹脉冲的输出能量达到最大值,为16.28 μJ,对应的能量转换效率为1.08×10
-4。在相同的实验条件下,该环形腔结构太赫兹波参量振荡器输出的最大太赫兹波能量是传统线形腔结构的2.35倍,实现了高能量、快速可调谐的太赫兹波输出。
Abstract
A surface-emitted ring-cavity terahertz (THz) wave parametric oscillator is constructed based on the 1% molar fraction of MgO-doped near-stoichiometric lithium niobite crystal, whose output THz frequency tuning range is 0.99-3.84 THz and frequency tuning response time is 600 μs. When the pump pulse energy is 150.30 mJ and the THz frequency is 1.59 THz, the output energy of the THz pulse is the maximum 16.28 μJ and the corresponding energy-conversion efficiency is 1.08×10
-4. Moreover, under the same experimental conditions, the maximum THz wave output energy from this ring-cavity THz wave parametric oscillator is about 2.35 times that obtained from the conventional linear-cavity ones. The THz wave output with high-energy and rapid-tuning is realized.
徐德刚, 李长昭, 王与烨, 唐隆煌, 闫超, 贺奕焮, 姚建铨. 基于MgO∶SLN晶体的环形腔太赫兹参量振荡器[J]. 光学学报, 2018, 38(11): 1119001. Degang Xu, Changzhao Li, Yuye Wang, Longhuang Tang, Chao Yan, Yixin He, Jianquan Yao. Ring-Cavity Terahertz Parametric Oscillator Based on MgO∶SLN Crystals[J]. Acta Optica Sinica, 2018, 38(11): 1119001.
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