Portable ppb-level carbon dioxide sensor based on flexible hollow waveguide cell and mid-infrared spectroscopy

被引：31

作者：

Chen, Zhangxiong ^{[1
]}

Zeng, Jiafu ^{[1
]}

Zhu, Menghui ^{[1
]}

Zhu, Xiaosong ^{[1
]}

Shi, Yiwei ^{[1
,2
]}

机构：

[1] Fudan Univ, Key Lab Informat Sci Electromagnet Waves MoE, 220 Handan Rd, Shanghai 200433, Peoples R China

[2] Zhongshan Fudan Joint Innovat Ctr, Zhongshan 528437, Guangdong, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2022年 / 359卷

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Portable gas sensor; Infrared absorption spectroscopy; Hollow waveguide; Miniaturization; MU-M; GAS-DETECTION;

D O I：

10.1016/j.snb.2022.131553

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We demonstrated a mid-infrared (mid-IR) gas sensor based on a hollow waveguide (HWG) cell, which was fabricated with a flexible polycarbonate (PC) base tube. The HWG inner-coated with silver and silver iodide films achieves a low loss property at 4.26 mu m wavelength of carbon dioxide fingerprint absorption. The source and detector of the sensor were broad-spectrum light source and pyroelectric detector with Fabry-Pe ' rot (FP) filter. The HWG cell is butt-coupled with the light source and detector. No other optical elements are required to ensure the stability of the sensor. The performance of the sensor with HWGs at various lengths and inner diameters was tested and optimized. The sensor with a coiled HWG cell has a limit of detection (LOD) as low as 263 ppb. This scheme provided a simple, miniaturized, and cost-effective solution for trace gas sensing.

引用

页数：7

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