J-GLOBAL ID:200904000172931790  Research Project code:0150001087 Update date:Dec. 27, 2004

Study on spectroscopic methods for laser long-path absorption measurement of atmospheric trace species

Study period:1999 - 2001
Organization (1):
Investigating Researcher (1):
Research overview:
Although a laser long-path absorption method is defined as a remote measurement method for atmospheric trace species, where high sensitivity is expected in principle, a good wavelength tunable light source is involved in application problem. Recently, non-linear optical elements and semiconductor lasers having periodic structures are remarkably developed and the new progress of a laser long-path absorption system using these elements is expected. In this study, these new infrared wavelength tunable light sources are used to develop a spectroscopic measurement method effectively using their properties. For a quantum cascade laser as a semiconductor laser having a periodic structure researched and developed in USA or others, properties in continuous wave operation and pulsed operation are investigated to examine the spectrum measurement method mostly effective for the measurement of atmospheric trace species and its application.
Keywords (4):
absorption spectroscopy ,  atmospheric trace species ,  laser long-path absorption method ,  infrared tunable laser
Project Organization (1):
  • (A153000000)
Research program: Ordinary Research
Ministry with control over the research :
Ministry of the Environment
Organization with control over the research:
National Institute for Environmental Studies

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