An efficient and compact difference-frequency-generation spectrometer and its application to 12CH3D/12CH4 isotope ratio measurements

Kiyoshi Tsuji, Hiroaki Teshima, Hiroyuki Sasada, Naohiro Yoshida

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have developed an efficient and compact 3.4 μm difference-frequency-generation spectrometer using a 1.55 μm distributed feedback (DFB) laser diode, a 1.06 μm DFB laser diode, and a ridge-waveguide periodically poled lithium niobate. It is continuously tunable in the 30 cm-1 span and is applied to 12CH3D12CH4 isotope ratio measurements. The suitable pair of 12CH3Dv4 pP(7,6) and 12CH4 ν2+ν4 R(6) F1(1) lines enabled us to determine their isotope ratio with a precision repeatability of 0.8‰ using a sample and a working standard of pure methane with an effective signal averaging time of 100 ms.

Original languageEnglish
Pages (from-to)6612-6622
Number of pages11
JournalSensors
Volume10
Issue number7
DOIs
Publication statusPublished - 2010 Jul

Keywords

  • Difference frequency generation
  • Isotope ratio
  • Laser spectroscopy
  • Methane
  • Waveguide PPLN

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'An efficient and compact difference-frequency-generation spectrometer and its application to <sup>12</sup>CH<sub>3</sub>D/<sup>12</sup>CH<sub>4</sub> isotope ratio measurements'. Together they form a unique fingerprint.

Cite this