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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 44,
  • Issue 9,
  • pp. 1501-1507
  • (1990)

Reduction of Convective Low-Frequency Noise in Thermal Lens Spectrometry

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Abstract

The construction and optimization of a thermal lens spectrometer with coaxial pump/probe configuration is reported. The low-frequency noise of convective origin is studied in detail, and it is demonstrated that a horizontal slit, instead of a pinhole, can be used as a simple way of reducing the noise to a negligible level without losing sensitivity.

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