Mid-infrared pulsed nanosecond difference frequency generation of oxide LGN crystal up to 5.7 μm
Mid-infrared pulsed nanosecond difference frequency generation of oxide LGN crystal up to 5.7 μm
复制标题
产生高达 5.7 µm 的氧化物 LGN 晶体的中红外脉冲纳秒差频
DOI：
10.1364/ol.418215
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发表时间：
2021-02-15
期刊：
影响因子：
3.6
通讯作者：
Zhang, Huaijin
中科院分区：
文献类型：
--
作者：
Cui, Chen;Lu, Dazhi;Zhang, Huaijin
据我们所知，我们首次展示了氧化物La3Ga5.5Nb0.5O14（LGN）晶体在近红外激光器纳秒脉冲泵浦下的可调谐差频产生（DFG）。计算了中红外区差分光纤光栅的I型和II型相位匹配条件。用此晶体分别在Ⅱ类和Ⅰ类相位匹配条件下获得了波长为4.4 ~ 5.7 μ m和4.56 ~ 5.6 μ m的可调谐激光输出，最大输出能量为13.1 μ J，与理论计算值吻合较好。本工作为纳秒脉冲激光的泵浦提供了一种很有前途的中红外非线性晶体，同时也为进一步的光子学应用提供了一种波长超过5 μ m的可调谐中红外激光源。(C)2021美国光学学会
We demonstrate the tunable difference frequency generation (DFG) of an oxide La3Ga5.5Nb0.5O14 (LGN) crystal pumped by near-infrared lasers with nanosecond pulses for the first time to our knowledge. The type I and II phase-matching conditions of DFG were calculated in the mid-infrared region. With the processed LGN crystals, tunable lasers in the wavelength range from 4.4 to 5.7 mu m and 4.56 to 5.6 mu m were achieved under type II and I phase-matching conditions, respectively, with the maximum output energy of 13.1 mu J, which agreed well with the theoretical calculation. This work provides the kind of promising mid-infrared nonlinear crystals for the pumping of nanosecond pulsed lasers as well as a tunable mid-infrared laser source at a wavelength over 5 mu m in further photonic applications. (C) 2021 Optical Society of America