Development of laser sensing device both NH3 at 1.53µm and NO2 at 3.46µm at the same instant using laser absorption spectrometry

Kouichi Wake; Takuro Ono; Satoru Tanoue; Nobuyoshi Ohtani; Shigeru Yamaguchi; Masamori Endo; Kenzo Nanri; Takakazu Morita; Tomoo Fujioka

doi:10.1117/12.590282

23 March 2005 Development of laser sensing device both NH₃ at 1.53μm and NO₂ at 3.46μm at the same instant using laser absorption spectrometry

Kouichi Wake, Takuro Ono, Satoru Tanoue, Nobuyoshi Ohtani, Shigeru Yamaguchi, Masamori Endo, Kenzo Nanri, Takakazu Morita, Tomoo Fujioka

Author Affiliations +

Proceedings Volume 5710, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications IV; (2005) https://doi.org/10.1117/12.590282
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States

Abstract

This paper reports on a trace gas monitor using a dual wavelength coherent light source. The laser spectrometer is based on difference frequency generation (DFG) techniques in a periodically poled lithium niobate (PPLN) crystal, naturally having two laser sources (i.e., signal and pump laser sources) in it. A newly proposed idea is to use residual signal DFB-LD power to tune to NH₃ absorption lines around at 1.536 μm when the DFG output wavelengths are accessed at 3.46 μm. In the experiments, the signal DFB-LD was carefully tune the wavelength guided by HITRAN database in order to select appropriate mid-IR absorption lines of NO₂, while the DFB-LD can detect simultaneously NH₃ absorption lines. As results, both gaseous species were detected successfully with the same multi-pass optical cell in one DFG spectrometer scheme. Spectroscopic data both in near-IR and in mid-IR region, simulating flue gas condition are discussed in detail.

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Kouichi Wake, Takuro Ono, Satoru Tanoue, Nobuyoshi Ohtani, Shigeru Yamaguchi, Masamori Endo, Kenzo Nanri, Takakazu Morita, and Tomoo Fujioka "Development of laser sensing device both NH₃ at 1.53μm and NO₂ at 3.46μm at the same instant using laser absorption spectrometry", Proc. SPIE 5710, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications IV, (23 March 2005); https://doi.org/10.1117/12.590282

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