A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases

Research output: Contribution to journalLetter

21 Citations (Scopus)

Abstract

A new methodology for the development of miniature photoacoustic trace gas sensors using 3D printing is presented. A near-infrared distributed feedback (DFB) laser is used together with a polymer based gas cell, off the shelf fiber optic collimators and a microelectromechanical system (MEMS) microphone to measure acetylene at 1532.83nm. The resonance behavior of the miniature gas cell is analyzed using a theoretical and experimental approach, with a measured resonance frequency of 15.25kHz and a Q-factor of 15. A minimum normalized noise equivalent absorption of 4.5·10-9Wcm-1Hz-1/2 is shown together with a 3σ detection limit of 750 parts per billion (ppb) for signal averaging times of 35seconds. The fiber coupled delivery and miniature cost-effective cell design allows for use in multi-point and remote detection applications.
LanguageEnglish
Pages4796-4799
Number of pages4
JournalOptics Letters
Volume39
Issue number16
Early online date16 Jul 2014
DOIs
Publication statusPublished - 8 Aug 2014

Fingerprint

photoacoustic spectroscopy
cells
gases
distributed feedback lasers
collimators
microphones
shelves
printing
acetylene
infrared lasers
microelectromechanical systems
Q factors
fiber optics
delivery
methodology
costs
fibers
sensors
polymers

Keywords

  • spectrometers
  • measurement instumentation
  • photoacoustic spectroscopy
  • remote sensors
  • remote sensing

Cite this

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title = "A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases",
abstract = "A new methodology for the development of miniature photoacoustic trace gas sensors using 3D printing is presented. A near-infrared distributed feedback (DFB) laser is used together with a polymer based gas cell, off the shelf fiber optic collimators and a microelectromechanical system (MEMS) microphone to measure acetylene at 1532.83nm. The resonance behavior of the miniature gas cell is analyzed using a theoretical and experimental approach, with a measured resonance frequency of 15.25kHz and a Q-factor of 15. A minimum normalized noise equivalent absorption of 4.5·10-9Wcm-1Hz-1/2 is shown together with a 3σ detection limit of 750 parts per billion (ppb) for signal averaging times of 35seconds. The fiber coupled delivery and miniature cost-effective cell design allows for use in multi-point and remote detection applications.",
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author = "Ralf Bauer and George Stewart and Walter Johnstone and Euan Boyd and Michael Lengden",
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A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases. / Bauer, Ralf; Stewart, George; Johnstone, Walter; Boyd, Euan; Lengden, Michael.

In: Optics Letters, Vol. 39, No. 16, 08.08.2014, p. 4796-4799.

Research output: Contribution to journalLetter

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