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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 7 — Apr. 1, 2006
  • pp: 909–911

Simple and accurate measurement of the absorption coefficient of an absorbing plate by use of the Brewster angle

Kazuhiko Ogusu, Keijiro Suzuki, and Hajime Nishio  »View Author Affiliations

Optics Letters, Vol. 31, Issue 7, pp. 909-911 (2006)

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We propose a simple and accurate method for measuring the refractive index and the absorption coefficient of an absorbing parallel plate. The method is essentially based on transmittance measurement with minimum reflectance at the Brewster angle for p-polarized light, which enables us to measure a low absorption loss of the order of 0.1 dB cm for a typical plate thickness of 1 mm . The error that is due to the approximation used is practically negligible, and the accuracy of measured results depends mainly on the variations in the flatness and parallelism of the two surfaces of the sample and on instrumental errors.

© 2006 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.5700) Instrumentation, measurement, and metrology : Reflection
(300.1030) Spectroscopy : Absorption
(300.6190) Spectroscopy : Spectrometers
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: November 29, 2005
Revised Manuscript: December 21, 2005
Manuscript Accepted: December 23, 2005

Kazuhiko Ogusu, Keijiro Suzuki, and Hajime Nishio, "Simple and accurate measurement of the absorption coefficient of an absorbing plate by use of the Brewster angle," Opt. Lett. 31, 909-911 (2006)

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