A highly sensitive LITES sensor based on a multi-pass cell with dense spot pattern and a novel quartz tuning fork with low frequency

被引：223

作者：

Liu, Yahui ^{[1
,2
]}

Qiao, Shunda ^{[1
,2
]}

Fang, Chao ^{[1
,2
]}

He, Ying ^{[1
,2
]}

Sun, Haiyue ^{[1
,2
]}

Liu, Jian ^{[3
]}

Ma, Yufei ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150000, Peoples R China

[2] Harbin Inst Technol, Zhengzhou Res Inst, Zhengzhou 450000, Peoples R China

[3] Harbin Inst Technol, Sch Instrumentat Sci & Engn, Adv Microscopy & Instrumentat Res Ctr, Harbin 150080, Peoples R China

来源：

OPTO-ELECTRONIC ADVANCES | 2024年 / 7卷 / 03期

基金：

中国国家自然科学基金;

关键词：

light-induced thermoelectric spectroscopy; quartz tuning fork; gas sensing; multi-pass cell; PPB-LEVEL DETECTION; SPECTROSCOPY; DESIGN;

D O I：

10.29026/oea.2024.230230

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A highly sensitive light -induced thermoelectric spectroscopy (LITES) sensor based on a multi -pass cell (MPC) with dense spot pattern and a novel quartz tuning fork (QTF) with low resonance frequency is reported in this manuscript. An erbium -doped fiber amplifier (EDFA) was employed to amplify the output optical power so that the signal level was further enhanced. The optical path length (OPL) and the ratio of optical path length to volume (RLV) of the MPC is 37.7 m and 13.8 cm -2, respectively. A commercial QTF and a self -designed trapezoidal -tip QTF with low frequency of 9461.83 Hz were used as the detectors of the sensor, respectively. The target gas selected to test the performance of the system was acetylene (C2H2). When the optical power was constant at 1000 mW, the minimum detection limit (MDL) of the C2H2-LITES sensor can be achieved 48.3 ppb when using the commercial QTF and 24.6 ppb when using the trapezoidal -tip QTF. An improvement of the detection performance by a factor of 1.96 was achieved after replacing the commercial QTF with the trapezoidal -tip QTF.

引用

页数：10

共 63 条

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