A high sensitive methane QEPAS sensor based on self-designed trapezoidal-head quartz tuning fork and high power diode laser

Ma, Hanxu; Chen, Yanjun; Qiao, Shunda; He, Ying; Ma, Yufei

doi:10.1016/j.pacs.2025.100683

articlePhotoacousticsJan 6, 2025GOLD OA

A high sensitive methane QEPAS sensor based on self-designed trapezoidal-head quartz tuning fork and high power diode laser

HMHanxu Ma YCYanjun Chen SQShunda Qiao YHYing He YMYufei Ma

Harbin Institute of Technology

PubMed

Indexed incrossrefdoajpubmed

Abstract

A high sensitive methane (CH 4 ) sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) using self-designed trapezoidal-head quartz tuning fork (QTF) and high power diode laser is reported for the first time in this paper. The trapezoidal-head QTF with low resonant frequency ( f 0 ) of ~ 9 kHz, serves as the detection element, enabling longer energy accumulation times. A diode laser with an output power of 10 mW is utilized as the excitation source. A Raman fiber amplifiers (RFA) is employed to boost the diode laser power to 300 mW to increase the excitation intensity. Acoustic micro-resonators (AmRs) are designed and placed on both sides of the QTF to form an acoustic standing wave cavity, which…

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Topics & keywords

Topics

Keywords

Materials science
Diode
Optoelectronics
Quartz
Laser
Methane
Power (physics)
Head (geology)

UN Sustainable Development Goals

Affordable and clean energy

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