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Applied Optics

Applied Optics


  • Vol. 35, Iss. 13 — May. 1, 1996
  • pp: 2253–2258

Precise measurement of the refractive index and optical rotatory power of a suspension by a delayed optical heterodyne technique

Takahisa Mitsui and Katsumi Sakurai  »View Author Affiliations

Applied Optics, Vol. 35, Issue 13, pp. 2253-2258 (1996)

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By using an optical heterodyne technique, we have demonstrated the detection of ballistic photons traveling through a suspension. We measured the propagation time of light in a sample with a variable optical delay line in the reference arm of an interferometer, using a superluminescent diode as a light source. The resolution and accuracy in propagation time measurement were 400 and 3 fs, respectively. The minimum detectable rotation angle of 1/10,000 deg was achieved with an integration time of 5 s. This system can measure the refractive index and optical rotatory power of the suspension in a solvent without disturbing heavy scattering from particles in the suspension, because ballistic photons are detected.

© 1996 Optical Society of America

Original Manuscript: July 17, 1995
Revised Manuscript: December 11, 1995
Published: May 1, 1996

Takahisa Mitsui and Katsumi Sakurai, "Precise measurement of the refractive index and optical rotatory power of a suspension by a delayed optical heterodyne technique," Appl. Opt. 35, 2253-2258 (1996)

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