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设计优化和实施一个具有0.1厘米-1分辨率光谱的旋转运动的里叶变换光谱仪
Optics express
|October 20, 2023
概括
我们开发了一种高分辨率的近红外里埃变换光谱仪 (FTS),采用了新的旋转设计. 这种优化的FTS实现了0.1cm-1分辨率,使灵敏的气体光谱学和放大自发发射的分析.
科学领域:
- 频谱学是一种光谱学.
- 光学工程是指光学工程.
- 仪器化 仪器化 仪器化
背景情况:
- 福里埃变换光谱仪 (FTS) 对于光谱分析至关重要.
- 现有的FTS设计面临着分辨率,尺寸或扫描范围的限制.
- 高分辨率近红外光谱对于各种科学应用至关重要.
研究的目的:
- 设计和优化一个紧的,高分辨率的近红外FTS.
- 为了达到0.1cm-1的光谱分辨率.
- 为了验证放大自发发射 (ASE) 分析和气体光谱的FTS性能.
主要方法:
- 一个旋转的镜子对系统被设计用于扫描光路长度 (OPL).
- 一个模式搜索算法优化了几何参数,以在体积约束范围内获得最大的扫描范围.
- 实施了一种数据处理方法,以使用He-Ne激光纠正非线性OPL扫描.
主要成果:
- 优化的FTS实现了0.1厘米-1的分辨率.
- 进行了1550 ± 25nm范围内的Er-doped纤维放大器ASE的光谱分析.
- 在一个16.5厘米长的气体电池中,成功检测到化的明显吸收线.
- 通过1.45 × 10-5 cm-1 Hz-1/2 的噪声等效吸收系数,证明了高的检测灵敏度.
结论:
- 实施的旋转FTS系统在近红外区域提供了高分辨率和灵敏度.
- 优化的设计成功地平衡了性能与系统约束.
- FTS适用于包括ASE表征和微量气体检测在内的应用.
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