| 引用本文: | 孔辉,卞进田,叶庆,等.BaGa4Se7与KTiOAsO4光参量振荡输出3.5 μm激光性能对比.[J].国防科技大学学报,2022,44(5):150-157.[点击复制] |
| KONG Hui,BIAN Jintian,YE Qing,et al.Comparison of output 3.5 μm laser properties by optical parametric oscillation of BaGa4Se7 and KTiOAsO4[J].Journal of National University of Defense Technology,2022,44(5):150-157[点击复制] |
|
| |
|
|
| 本文已被：浏览 4827次 下载 3507次 |
| BaGa4Se7与KTiOAsO4光参量振荡输出3.5 μm激光性能对比 |
| 孔辉1,2,卞进田1,2,叶庆1,2,徐海萍1,2,孙晓泉1,2 |
|
(1. 国防科技大学 脉冲功率激光技术国家重点实验室, 安徽 合肥 230037;2. 国防科技大学 先进激光技术安徽省实验室, 安徽 合肥 230037)
|
| 摘要: |
| 为对比新型非线性晶体BaGa4Se7(简称 BGSe)和成熟商用非线性晶体KTiOAsO4(简称 KTA) 所输出的中红外激光性能,使用1.06 μm激光泵浦BGSe(56.3°,0°,type-Ⅰ)和KTA(90°, 0°,type-Ⅱ-A)输出3.5 μm激光。在泵浦光波长为1 064 nm、脉宽为13 ns、光斑直径为4 mm、光参量振荡腔长为90 mm的条件下,实验测得KTA(L=20 mm)和BGSe(L=15 mm)的泵浦振荡阈值分别为52.6 mJ(理论值为46.11 mJ)和20.6 mJ(理论值为18.32 mJ)；BGSe输出波长与温度的变化率Δλ2/ΔT为3.20 nm/℃(理论值为2.49 nm/℃),KTA的Δλ2/ΔT为0.073 nm/℃(理论值为0.077 nm/℃)；实验测得BGSe的输出线宽为4.71 nm,KTA为2.45 nm。BGSe和KTA的泵浦阈值和温度调谐在理论和实验上吻合得较好,且结果表明:BGSe在这两个方面优于KTA；但KTA在输出窄线宽方面优于BGSe晶体。实验结果表明,BGSe是一种具有广泛应用前景的中远红外非线性晶体。 |
| 关键词: KTiOAsO4 BaGa4Se7 中红外激光 温度调谐 线宽 |
| DOI：10.11887/j.cn.202205016 |
| 投稿日期：2020-11-05 |
| 基金项目:脉冲功率激光技术国家重点实验室主任基金资助项目(SKL2019ZR06,SKL2022ZR03) |
|
| Comparison of output 3.5 μm laser properties by optical parametric oscillation of BaGa4Se7 and KTiOAsO4 |
| KONG Hui1,2, BIAN Jintian1,2, YE Qing1,2, XU Haiping1,2, SUN Xiaoquan1,2 |
|
(1. State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China;2. Advanced Laser Technology Laboratory of Anhui Province, National University of Defense Technology, Hefei 230037, China)
|
| Abstract: |
| In order to compare the mid infrared laser performance output by the new nonlinear crystal BaGa4Se7 (BGSe) and the mature commercial nonlinear crystal KTiOAsO4 (KTA), the 1.06 μm laser was used to pump BGSe (56.3 °, 0 °, type-Ⅰ) and KTA (90 °, 0 °, type-Ⅱ-A) to output 3.5 μm laser. The pump oscillation threshold of KTA and BGSe was 52.6 mJ (the theoretical value was 46.11 mJ) and 20.6 mJ (the theoretical value was 18.32 mJ) respectively when the pump wavelength was 1 064 nm, the pulse width was 13 ns, the beam diameter was 4 mm and theoptical parametric oscillator, cavity length was 90 mm. The Δλ2/ΔT of BGSe and KTA was 3.20 nm/℃(the theoretical value was 2.49 nm/℃) and 0.073 nm/℃(the theoretical value was 0.077 nm/℃). The output linewidth of BGSe and KTA was 4.71 nm and 2.45 nm respectively. The experimental results of the pump oscillation threshold and the temperature tuning range fit the theoretical simulation well, and the results show that BGSe is better than KTA in these two aspects. But the output linewidth of KTA is narrower than that of BGSe. The experimental results indicated that BGSe is a mid-to far-infrared nonlinear crystal with wide applications. |
| Keywords: KTiOAsO4 BaGa4Se7 mid-infrared laser temperature tuning linewidth |
|
|
|
|
|
