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通过波长扫描的无冷MIR光谱,使用PPLN脊波导上升转换

Abhishek Rai, Ludovic Grossard, Tristan Chabrol

|November 11, 2025

概括

这项研究引入了一种使用上转换的新室温中波红外光谱法. 这种非线性光谱仪为实用的MIR光谱工具提供了低成本,无冷的FTIR替代方案.

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.
非线性光学非线性光学

背景情况:

对于中波红外 (MWIR) 检测,传统的富里埃变换红外 (FTIR) 光谱技术往往受到高成本和需要冷冷却的限制.
为MWIR系列开发紧且实用的光谱工具仍然是分析化学和材料科学领域的一个重大挑战.

研究的目的:

介绍一种新的室温中波红外光谱 (MWIR) 技术.
克服现有的FTIR方法的局限性,通过开发一种无冷,小型化的光谱方法.

主要方法:

采用长2厘米的周期极化酸 (PPLN) 脊波导用于光学上升转换.
采用低功率,连续波单色激光器,扫描其波长以采样MWIR光谱.
使用敏感的探测器检测到向上转换的信号.

主要成果:

成功展示了一种"非线性光谱仪",能够在室温下采样MWIR光谱.
使用道化频谱的实验验证显示,热源光谱调制的准确恢复.
在光谱调制恢复中实现了3%的低相对误差.

结论:

开发的基于上转换的MWIR光谱技术是传统方法的强大和有前途的替代方案.
这种方法为开发小型化,实用且具有成本效益的MIR光谱仪器铺平了道路.
室温操作和探测器的使用提高了MWIR光谱学的实用性和可访问性.

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