一个基于BaGa4Se7晶体的脉冲中红外光源,直线宽度为4-12μm
Zengjun Xiao1, Jieqiong Gu1, Zhaofeng Wang1
1Hefei National Research Center for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
The Review of scientific instruments
|September 7, 2023
概括
一个新的BaGa4Se7 (BGSe) 晶体产生连贯的中红外线 (MIR) 光,用于高分辨率光谱学. 这种脉冲MIR源实现了狭窄的线宽,非常适合详细的分子分析.
科学领域:
- 光学和光子学 在光学和光子学.
- 频谱学是一种光谱学.
- 材料科学 材料科学 材料科学
背景情况:
- 高分辨率的中红外光谱 (MIR) 需要先进的光源.
- 现有的光源可能在可调性,连贯性或光谱分辨率方面存在局限性.
研究的目的:
- 为MIR光谱学开发一种全新的全固态连贯脉冲光源.
- 为了利用BaGa4Se7 (BGSe) 晶体进行高效的MIR生成.
- 为了描述开发的MIR源的性能.
主要方法:
- 使用KTiOPO4晶体的注射种子光学参数发生器 (OPG) 和光学参数放大器 (OPA) 系统.
- 差异频率生成 (DFG) 用于通过将OPG-OPA置输出与Nd:YAG激光基础混合来产生MIR脉冲.
- 使用BaGa4Se7 (BGSe) 晶体作为DFG的非线性介质.
- 洞环下降光谱 (CRDS) 用于测量H2O吸收线,以确定线宽.
主要成果:
- 一个连贯的脉冲MIR光源在4-12μm区域运行被成功演示.
- 典型的脉冲能量超过100μJ,脉冲持续时间约为5 ns.
- 该MIR源的线宽为120±10MHz,接近富里埃变换的极限.
结论:
- BaGa4Se7 (BGSe) 晶体有效地产生高分辨率的MIR脉冲.
- 开发的全固态系统为MIR光谱应用提供了强大的工具.
- 取得的线宽适用于精确的光谱测量,例如分析分子吸收线.
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