Subnanosecond, mid-IR, 0.5 kHz periodically poled stoichiometric LiTaO3 optical parametric oscillator with over 1 W average power.
Subnanosecond, mid-IR, 0.5 kHz periodically poled stoichiometric LiTaO3 optical parametric oscillator with over 1 W average power.
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平均功率超过 1 W 的亚纳秒、中红外、0.5 kHz 周期性极化化学钽锂光学参量振荡器。
DOI：
10.1364/ol.38.003347
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发表时间：
2013-09-01
期刊：
影响因子：
3.6
通讯作者：
Buchvarov I
中科院分区：
文献类型：
--
作者：
Chuchumishev D;Gaydardzhiev A;Fiebig T;Buchvarov I
报道了一种基于周期性极化化学计量钽酸锂（PPIO4）的亚纳秒中红外可调谐光参量振荡器，该振荡器由重复频率为0.5kHz的放大单频微片激光器泵浦，泵浦波长为1064nm。使用20 mm长的PPhP晶体，以三种不同的畴周期（30.2、30.3和30.4 μm）进行极化，并将晶体温度从20°C改变到265°C，我们实现了2990和3500 nm之间的波长调谐。所用介质的高非线性和大孔径（3.2 mm）确保了在整个调谐范围内的最大闲频输出能量约为2 mJ，对应于18%的闲频转换效率和超过1 W的平均功率。作为泵浦的818ps脉冲持续时间的结果，获得了270ps的空闲脉冲持续时间。
We report a subnanosecond mid-IR tunable optical parametric oscillator based on periodically poled stoichiometric lithium tantalate (PPSLT), pumped by an amplified single frequency microchip laser at 1064 nm at a repetition rate of 0.5 kHz. Using a 20 mm long PPSLT crystal polled with three different domain periods (30.2, 30.3, and 30.4 μm) and changing the temperature of the crystal from 20°C to 265°C, we achieved wavelength tuning between 2990 and 3500 nm. The high nonlinearity of the used medium and the large aperture (3.2 mm) ensure maximum idler output energy of ~2 mJ in the whole tuning range, corresponding to 18% idler conversion efficiency and more than 1 W of average power. 270 ps idler pulse durations were obtained as a result of the 818 ps pulse duration of the pump.