Multi-quartz-enhanced photoacoustic spectroscopy

被引：68

作者：

Ma, Yufei ^{[1
,2
]}

Yu, Xin ^{[1
]}

Yu, Guang ^{[1
]}

Li, Xudong ^{[1
]}

Zhang, Jingbo ^{[1
]}

Chen, Deying ^{[1
]}

Sun, Rui ^{[2
]}

Tittel, Frank K. ^{[3
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Postdoctoral Mobile Stn Power Engn & Engn Thermop, Harbin 150001, Peoples R China

[3] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 02期

基金：

黑龙江省自然科学基金; 中国博士后科学基金;

关键词：

PPB-LEVEL DETECTION; SENSOR; OXIDE; CO;

D O I：

10.1063/1.4927057

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A multi-quartz-enhanced photoacoustic spectroscopy (M-QEPAS) sensor system for trace gas detection is reported. Instead of a single quartz tuning fork (QTF) as used in QEPAS technique, a dual QTF sensor platform was adopted in M-QEPAS to increase the signal strength by the addition of the detected QEPAS signals. Water vapor was selected as the target analyte. M-QEPAS realized a 1.7 times signal enhancement as compared to the QEPAS method for the same operating conditions. A minimum detection limit of 23.9 ppmv was achieved for the M-QEPAS sensor, with a calculated normalized noise equivalent absorption coefficient of 5.95 x 10(-8) cm(-1) W/root Hz. The M-QEPAS sensor performance can be further improved when more QTFs are employed or an acoustic micro-resonator architecture is used. (C) 2015 AIP Publishing LLC.

引用

页数：3

共 9 条

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