Cavity-enhanced photoacoustic sensor based on a whispering-gallery-mode diode laser

Y. Pan; Y. Pan; L. Dong; L. Dong; H. Wu; H. Wu; W. Ma; W. Ma; L. Zhang; L. Zhang; W. Yin; W. Yin; L. Xiao; L. Xiao; S. Jia; S. Jia; F. K. Tittel

doi:10.5194/amt-12-1905-2019

Atmospheric Measurement Techniques (Mar 2019)

Cavity-enhanced photoacoustic sensor based on a whispering-gallery-mode diode laser

Y. Pan,
Y. Pan,
L. Dong,
L. Dong,
H. Wu,
H. Wu,
W. Ma,
W. Ma,
L. Zhang,
L. Zhang,
W. Yin,
W. Yin,
L. Xiao,
L. Xiao,
S. Jia,
S. Jia,
F. K. Tittel

Affiliations

Y. Pan: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
Y. Pan: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
L. Dong: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
L. Dong: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
H. Wu: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
H. Wu: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
W. Ma: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
W. Ma: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
L. Zhang: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
L. Zhang: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
W. Yin: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
W. Yin: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
L. Xiao: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
L. Xiao: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
S. Jia: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
S. Jia: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
F. K. Tittel: Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA

DOI: https://doi.org/10.5194/amt-12-1905-2019
Journal volume & issue: Vol. 12
pp. 1905 – 1911

Abstract

Read online

A cavity-enhanced photoacoustic (CEPA) sensor was developed based on an ultra-narrow linewidth whispering-gallery-mode (WGM) diode laser. A cavity-enhanced photoacoustic module (CEPAM) was designed to match the output beam from the WGM-diode laser, resulting in an increase in the excitation light power, which, in turn, significantly enhanced the photoacoustic signal amplitude. The results show that a signal gain factor of 166 was achieved, which is in excellent agreement with the power enhancement factor of 175 after considering the power transmissivity. The performance of the sensor was evaluated in terms of the detection sensitivity and linearity. A 1σ detection limit of 0.45 ppmV for C2H2 detection was obtained at atmospheric pressure with a 1 s averaging time.

Published in Atmospheric Measurement Techniques

ISSN: 1867-1381 (Print); 1867-8548 (Online)
Publisher: Copernicus Publications
Country of publisher: Germany
LCC subjects: Technology: Engineering (General). Civil engineering (General): Environmental engineering; Technology: Engineering (General). Civil engineering (General): Earthwork. Foundations
Website: http://www.atmospheric-measurement-techniques.net/home.html

About the journal