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Measurement of oxygen isotope ratio using tunable diode laser absorption spectroscopy

다이오드 레이저 흡수분광법을 이용한 산소 동위원소의 성분비 측정

  • Park, Sang-Eon (Time and Frequency Lab., Korea Research Institute of Standards and Science) ;
  • Jung, Do-Young (Lab. of Quantum Optics, Korea Atomic Energy Research Institute) ;
  • Kim, Jae-Woo (Lab. of Quantum Optics, Korea Atomic Energy Research Institute) ;
  • Ko, Kwang-Hoon (Lab. of Quantum Optics, Korea Atomic Energy Research Institute) ;
  • Im, Kwon (Lab. of Quantum Optics, Korea Atomic Energy Research Institute) ;
  • Jung, Eui-Chang (Lab. of Quantum Optics, Korea Atomic Energy Research Institute) ;
  • Kim, Chul-Joong (Lab. of Quantum Optics, Korea Atomic Energy Research Institute)
  • 박상언 (한국표준과학연구원 시간주파수 연구실) ;
  • 정도영 (한국원자력연구소 양자광학기술개발부) ;
  • 김재우 (한국원자력연구소 양자광학기술개발부) ;
  • 고광훈 (한국원자력연구소 양자광학기술개발부) ;
  • 임권 (한국원자력연구소 양자광학기술개발부) ;
  • 정의창 (한국원자력연구소 양자광학기술개발부) ;
  • 김철중 (한국원자력연구소 양자광학기술개발부)
  • Published : 2004.02.01

Abstract

Tunable diode laser absorption spectroscopy was performed for analysis of the H$_2$$^{18}$ O/H$_2$$^{16}$ O isotope ratio of a water sample which was enriched by the membrane distillation method. In order to improve the signal-to-noise ratio, the wavelength modulation spectroscopic method was used with a lock-in amplifier. The fringe noise could be suppressed by using the FFT (Fast Fourier Transform) lowpass filter and the optimization of the modulation depth of the laser frequency. The maximum deviation of $\delta$-value was measured to be$\pm$4$\textperthousand$.

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