Highly sensitive carbon dioxide detection based on enhanced photoacoustic spectroscopy with a thulium-doped fiber amplifier

被引：0
|
作者：
Wang, Fupeng [1 ]
Han, Ze [1 ]
Zhang, Jianguo [1 ]
Wu, Jinghua [1 ]
Wang, Qiang [2 ]
机构：
[1] Ocean Univ China, Fac Informat Sci & Engn, Engn Res Ctr Adv Marine Phys Instruments & Equipme, Opt & Optoelect Lab,Minist Educ,Qingdao Key Lab, Qingdao 266100, Peoples R China
[2] Chinese Acad Sci, State Key Lab Appl Opt, Changchun Inst Opt Fine Mech & Phys CIOMP, Changchun 130033, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2025年 / 23卷 / 02期
基金：
中国国家自然科学基金;
关键词：
photoacoustic spectroscopy; thulium-doped fiber amplifier; carbon dioxide; optical sensor; greenhouse gas detection; MULTIPASS CELL; SENSOR; PATTERN; METHANE; H2O; CH4; CO;
D O I：
10.3788/COL202523.023001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A thulium-doped fiber amplifier-enhanced photoacoustic spectroscopy (TDFE-PAS) sensor was developed for carbon dioxide (CO2) detection utilizing a 2004 nm distributed feedback (DFB) laser. The thulium-doped fiber was in-band pumped by a 1567 nm source to amplify the optical power of 2004 nm to enhance the photoacoustic excitation. As a result, the photo- acoustic signal was enhanced over 101 times. Based on a 7.9 mL differential PA cell, the sensor achieved a linearity of R2 = 0.9997 on CO2 detection in a wide concentration range of 0-10,000 ppm (part per million). The noise equivalent detection limit was evaluated to be 190 ppb (part per billion) at a response time of 10 s.
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页数：6
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