Radiation source for laser spectroscopy
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United States of America Patent
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Dec 14, 1999
Grant Date -
N/A
app pub date -
Dec 3, 1997
filing date -
Jun 21, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A laser array for determining the concentrations of gases. A simply acting device and a corresponding process are provided, which make possible a high signal resolution by reducing the interferences without prolonging the measurement time. The interferences occurring in the laser array are reduced by the laser source being set to perform longitudinal oscillations in the direction of the optical axis. These oscillations preferably have a sinus or sawtooth shape, and a frequency in the range of 10 to 1,000 Hz that does not otherwise occur in the laser array and an oscillation amplitude corresponding to one fourth to a multiple of the wavelength of the radiation of the laser source.
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