High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance

Ma, Yufei; Tong, Yao; He, Ying; Yu, Xin; Tittel, Frank K.

doi:10.3390/s18010122

Open AccessArticle

High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance

by

Yufei Ma

^1,*

,

Yao Tong

¹,

Ying He

¹,

Xin Yu

¹ and

Frank K. Tittel

^2,*

¹

National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China

²

Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA

^*

Authors to whom correspondence should be addressed.

Sensors 2018, 18(1), 122; https://doi.org/10.3390/s18010122

Submission received: 12 December 2017 / Revised: 31 December 2017 / Accepted: 2 January 2018 / Published: 4 January 2018

(This article belongs to the Section Chemical Sensors)

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Abstract

A highly sensitive carbon monoxide (CO) trace gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) was demonstrated. A high-power distributed feedback (DFB), continuous wave (CW) 2.33 μm diode laser with an 8.8 mW output power was used as the QEPAS excitation source. By optimizing the modulation depth and adding an optimum micro-resonator, compared to a bare quartz tuning fork (QTF), a 10-fold enhancement of the CO-QEPAS signal amplitude was achieved. When water vapor acting as a vibrational transfer catalyst was added to the target gas, the signal was further increased by a factor of ~7. A minimum detection limit (MDL) of 11.2 ppm and a calculated normalized noise equivalent absorption (NNEA) coefficient of 1.8 × 10⁻⁵ cm⁻¹W/√Hz were obtained for the reported CO-QEPAS sensor.

Keywords: QEPAS; carbon monoxide; high power diode laser; gas sensor

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MDPI and ACS Style

Ma, Y.; Tong, Y.; He, Y.; Yu, X.; Tittel, F.K. High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance. Sensors 2018, 18, 122. https://doi.org/10.3390/s18010122

AMA Style

Ma Y, Tong Y, He Y, Yu X, Tittel FK. High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance. Sensors. 2018; 18(1):122. https://doi.org/10.3390/s18010122

Chicago/Turabian Style

Ma, Yufei, Yao Tong, Ying He, Xin Yu, and Frank K. Tittel. 2018. "High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance" Sensors 18, no. 1: 122. https://doi.org/10.3390/s18010122

APA Style

Ma, Y., Tong, Y., He, Y., Yu, X., & Tittel, F. K. (2018). High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance. Sensors, 18(1), 122. https://doi.org/10.3390/s18010122

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High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance

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