Detection of CO2 concentration using a fiber-optic cantilever acoustic sensor in 2.0-μm band

Fengxin Xin; Dewang Yang; Chao Li; Wei Yan; Yong Wang

doi:10.1117/12.2585255

4 December 2020 Detection of CO₂ concentration using a fiber-optic cantilever acoustic sensor in 2.0-μm band

Fengxin Xin, Dewang Yang, Chao Li, Wei Yan, Yong Wang

Proceedings Volume 11617, International Conference on Optoelectronic and Microelectronic Technology and Application; 1161722 (2020) https://doi.org/10.1117/12.2585255
Event: International Conference on Optoelectronic and Microelectronic Technology and Application, 2020, Nanjing, China

Abstract

Cantilever enhanced photoacoustic spectroscopy (CEPAS) technology improves the detection ability of weak gas photoacoustic signal effectively utilizing a micro-cantilever acoustic sensor instead of capacitive microphone, which can achieve highly sensitive detection of CO₂ and has great significance for environmental monitoring, industrial production control and regional carbon emission monitoring and other applications. A fiber-optic Fabry-Perot (F-P) sensor with a cantilever structure is designed in this work to overcome the disadvantage of the complication of traditional mechanical cantilever photoacoustic spectroscopy system. The photoacoustic spectroscopy system is established based on the resonance enhancement of the fiber cantilever acoustic sensor with a 2.0 μm distributed feedback (DFB) laser, which combines the technologies of wavelength modulation and second-harmonic detection for measuring CO₂ concentration. The experimental results show that the concentration calibration curve has a good correlation of 0.9765, and the detection limit of CO₂ concentration reaches 0.044×10^-6, which verifies the feasibility of the system for detecting atmospheric CO₂ concentration.

Citation Download Citation

Fengxin Xin, Dewang Yang, Chao Li, Wei Yan, and Yong Wang "Detection of CO₂ concentration using a fiber-optic cantilever acoustic sensor in 2.0-μm band", Proc. SPIE 11617, International Conference on Optoelectronic and Microelectronic Technology and Application, 1161722 (4 December 2020); https://doi.org/10.1117/12.2585255

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available