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摘要: 3~5 μm中红外激光器在环境污染检测、医疗、工业等领域具有重要的应用价值。本文总结了基于ZnGeP2、MgO∶PPLN晶体的光参量振荡器(OPO)的国内外发展现状,分析了其各自不同结构系统设计的优势和发展前景。指出高功率、小体积、轻重量的光学参量振荡器是未来重要发展方向,发展的技术核心是生长更大尺寸的中红外激光晶体以及研制更高性能指标的OPO泵浦源,并对中红外激光器的发展趋势进行了展望。
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关键词:
- 中红外 /
- 光参量振荡器(OPO) /
- ZnGeP2 /
- MgO:PPLN
Abstract: Applications of 3~5 μm mid-infrared lasers in many fields such as environmental pollution detection, medical treatment and industry are introduced. The development of typical mid-infrared optical parametric oscillator(OPO) based on ZnGeP2 and MgO:PPLN at home and abroad is summarized in this paper, and the respective advantages and development prospects with different structure of the lasers designed on the two crystals are analyzed. It is indicated that high power and small size OPO is a significant developing direction in the future, and bigger-size infrared crystal and higher performance index of pump sources are the core of the development of OPO. Finally, the development trend of the mid-infrared laser is forecast.-
Key words:
- mid-infrared /
- optical parametric oscillator(OPO) /
- ZnGeP2 /
- MgO:PPLN
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表 1 光纤激光器泵浦中红外PPLN-OPO国内外研究现状
Table 1. Development of mid-infrared PPLN-OPO pumped by fiber laser at home and abroad
年份 研究单位 泵浦源参数 晶体尺寸 中红外输出参数 2008年 University of Helsinki 1 064 nm MgO:PPLN 2.7~3.45 μm 光纤激光器 50 mm×1 mm 瓦级的中红外输出[28] 20 W 2010年 E.L.Ginzton Laboratory, Yb光纤激光器 PPLN 3.8 μm附近1.8~2W[29] Stanford University 20 W 50 mm 2010年 ICFO-Institut de Yb光纤激光 MgO:PPLN 3.07 μm闲频光9.8 W,M2<1.28 Ciencies Fotoniques 30 W 50 mm×1 mm 光-光转换效率61%[30] 2014年 山东大学 Yb光纤激光器 MgO:PPLN 3.8 μm处1 W 20 W 多极化周期 光-光转换效率高于10% 50 mm×1 mm 波长可调谐[31] 2014年 浙江大学 线偏振脉冲YDFL MgO:PPLN 3.83 μm处3.3 W 平均25 W 50 mm×1 mm×10 mm M2为1.98和1.44[27] -
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