| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Wavelength Modulation Absorption Spectroscopy Using a Frequency-Quadruped Current-Modulated System |
SHAO Jie1, SUN Hui-Juan2, WANG Hui1, ZHOU Wei-Dong1, WU Gen-Zhu1,3
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| 1Institute of Information Optics of Zhejiang Normal University, Jinhua 321004 2Basic Courses Department of Beijing Union University, Beijing 100101 3State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 |
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| Cite this article: |
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SHAO Jie, SUN Hui-Juan, WANG Hui et al 2010 Chin. Phys. Lett. 27 054206 |
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Abstract A wavelength modulation absorption spectrometry (WMAS) with a frequency-quadruped system is demonstrated. The frequency-quadruped system consists of a two-frequency doubled external enhancement cavity with KNO3 and BBO crystals, and a current-modulated 906-nm single mode external cavity diode laser (ECDL), which generates the tunable wavelength modulated radiation at 226.7 nm used to detect the NO absorption line that belongs to the combined Q22(10.5) and QR12(10.5) lines of γ(0,0) band within the A2Σ+ -X2Π electronic transition system. The 1st, 2 nd and 3rd harmonic spectra are accomplished to show that it is possible to detect samples using the frequency quadruped system combined with the WMAS technique that can find practical applicability in the future.
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| Keywords:
42.68.Ca
78.20.Ci
25.20.Dc
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Received: 17 September 2009
Published: 23 April 2010
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| PACS: |
42.68.Ca
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(Spectral absorption by atmospheric gases)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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25.20.Dc
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(Photon absorption and scattering)
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