Near infrared diode laser absorption spectroscopy of acetylene between 6523 and 6587cm−1

Deng, Hao; Sun, Jiao; Yu, Benli; Li, Jingsong

doi:10.1016/j.jms.2015.05.004

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…In the past several decades, the tunable diode laser absorption spectroscopy (TDLAS) has played a growing role in the diagnostic of combustion and plasmas, as well as in some industrial applications [1][2][3][4][5][6][7][8][9]. As the key parameter in TDLAS, the absorbance contains the information of both gas properties (temperature, pressure, concentration, velocity, etc.)…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive, Calibration-Free WM-DAS Method for Recovering Absorbance—Part I: Theoretical Analysis

Peng

Ding

2020

Sensors

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The absorbance is of great importance in the tunable diode laser absorption spectroscopy (TDLAS) as it contains information of both gas properties and spectroscopic parameters. A novel, calibration-free wavelength modulation-direct absorption spectroscopy (WM-DAS) is proposed and experimentally verified in this two-part paper. This method combines the capability of absorbance measurement from DAS and the advantages of enhanced noise rejection and high sensitivity from WMS. In this Part I, we focus on the full theoretical basis and procedures of this method from the following three aspects: the high-accuracy characterizations of laser frequency and intensity, noise rejection ability by extracting the characteristic spectra through the fast Fourier transform (FFT) of the light intensity, and the simultaneous fitting strategy for both baseline and absorbance. The preliminary validation experiment of CO transition at 4300.6999 cm−1 in a static gas cell shows the high accuracy of the proposed method.

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