Photoacoustic CO2 sensor based on a DFB diode laser at 2.7 μm

Wolff, Marcus; Germer, Markus; Groninga, Hinrich; Harde, H.

doi:10.1140/epjst/e2008-00473-9

Eur. Phys. J. Spec. Top.

2008

DOI: 10.1140/epjst/e2008-00473-9

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Photoacoustic CO2 sensor based on a DFB diode laser at 2.7 μm

Marcus Wolff

Markus Germer

Hinrich Groninga

et al.

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Cited by 2 publications

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“…Its underlying mechanism relies on the photo-excited acoustic signals that linearly vary as a function of the absorbed laser power. This emerging tool has been presently established within industrial gas analysis sector because compared with other optical detection schemes, it possesses unique advantages such as high-sensitivity, wide-dynamic range, short optical path length (compact size), and near-tozero background signal [21][22][23][24][25][26][27] . The acoustic signals can be excited either from a modulated (square or a sine wave obtained by modulating CW laser with a Hz or kHz repetition rate) or pulsed (nanosecond pulse duration) laser pump.…”

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confidence: 99%

Mid-infrared photoacoustic gas monitoring driven by a gas-filled hollow-core fiber laser

Wang

Feng²,

Adamu

et al. 2021

Sci Rep

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Development of novel mid-infrared (MIR) lasers could ultimately boost emerging detection technologies towards innovative spectroscopic and imaging solutions. Photoacoustic (PA) modality has been heralded for years as one of the most powerful detection tools enabling high signal-to-noise ratio analysis. Here, we demonstrate a novel, compact and sensitive MIR-PA system for carbon dioxide (CO2) monitoring at its strongest absorption band by combining a gas-filled fiber laser and PA technology. Specifically, the PA signals were excited by a custom-made hydrogen (H2) based MIR Raman fiber laser source with a pulse energy of ⁓ 18 μJ, quantum efficiency of ⁓ 80% and peak power of ⁓ 3.9 kW. A CO2 detection limit of 605 ppbv was attained from the Allan deviation. This work constitutes an alternative method for advanced high-sensitivity gas detection.

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mentioning

confidence: 99%

Mid-infrared photoacoustic gas monitoring driven by a gas-filled hollow-core fiber laser

Wang

Feng²,

Adamu

et al. 2021

Sci Rep

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Tunable-diode-laser spectroscopy of C_2H_2 using a 303 μm GaInAsSb/AlGaInAsSb distributed-feedback laser

et al. 2009

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The mid-IR region beyond 3 microm is very attractive for gas sensing, since the fundamental absorption bands of several hydrocarbons are located in this range. We demonstrated, for the first time to our knowledge, the use of a novel GaInAsSb/AlGaInAsSb distributed-feedback laser emitting around 3.03 microm in a tunable-diode laser-spectroscopy application. The laser operates in continuous mode at room temperature with excellent single-mode and tuning properties. A comparison of the measurement results was made with the recently updated data on C212H(2) found in the HITRAN 2008 compilation. A good agreement was found between the measurements and the database. Wavelength modulation spectroscopy of acetylene at ambient conditions was made, and a sensitivity of 18 ppb (parts per billion) per meter at an integration time of 3 s corresponding to a relative absorption of 5 x 10(-6) was obtained. The optimum detection limit of the acetylene measurement in this wavelength modulation spectroscopy setup was better than 1.5 ppb m at an integration time of 600 seconds.

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Photoacoustic CO2 sensor based on a DFB diode laser at 2.7 μm

Cited by 2 publications

References 6 publications

Mid-infrared photoacoustic gas monitoring driven by a gas-filled hollow-core fiber laser

Mid-infrared photoacoustic gas monitoring driven by a gas-filled hollow-core fiber laser

Tunable-diode-laser spectroscopy of C_2H_2 using a 303 μm GaInAsSb/AlGaInAsSb distributed-feedback laser

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