Study on the Photoacoustic Technology to Simultaneous In-Situ Detection of the Cavity Ring-Down Spectrum for Multi-Optical Parameters

Study on the Photoacoustic Technology to Simultaneous In-Situ Detection of the Cavity Ring-Down Spectrum for Multi-Optical Parameters

A simultaneous in-situ detection technique to obtain multi-optical parameters was proposed. The same 403.56 nm, low power, blue diode laser was used to conduct the cavity ring-down spectroscopy and photoacoustic spectroscopy, which were coupled. Four photoacoustic spectra were applied to the simulta...

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Bibliographic Details
Published in:IEEE photonics journal 2020-04, Vol.12 (2), p.1-11
Main Authors: Jin, Hua-Wei, Hu, Ren-Zhi, Xie, Pin-Hua, Huang, Chong-Chong, Wang, Feng-Yang, Lin, Chuan
Format: Article
Language:eng
Subjects:
Absorption
Atmospheric measurements
blue diode laser
cavity ring-down spectroscopy
Cavity ringdown
coupled spectrum
Diode lasers
Gas lasers
Mirrors
Parameters
Photoacoustic technology
Ring lasers
Semiconductor lasers
simultaneous in-situ detection
Spectroscopy
Spectrum analysis
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Summary:A simultaneous in-situ detection technique to obtain multi-optical parameters was proposed. The same 403.56 nm, low power, blue diode laser was used to conduct the cavity ring-down spectroscopy and photoacoustic spectroscopy, which were coupled. Four photoacoustic spectra were applied to the simultaneous in-situ detection of the cavity ring-down spectrum, which were systematically compared and analyzed for the first time. And the main performance of the systems varied with the arrangement of the photoacoustic pool. The results reveal that the photoacoustic response was optimized by the high reflectivity mirror with the pool constant of 1450.64 (Pα·cm)/W and the signal sensitivity of 0.2562 μv/ppb. The intensity value of the photoacoustic pool inside the cavity ring down was superimposed to 48.45% of the initial intensity. The corresponding experimental results were consistent with the theoretical analysis and shown the coupled cavity could suitable for simultaneous in-situ measurement of high concentration. The coupled two detection techniques detected different optical parameters and thus provided a new method for the simultaneous in-situ detection of the multi-optical parameters of specific atmospheric components.
ISSN:1943-0655
1943-0655