Partial elimination of shot noise in optical delayed heterodyne interferometer with incoherent light using spectral interference

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Abstract

We succeeded in reducing the shot noise inherent in the optical delayed heterodyne interferometer with incoherent light by introducing spectral interference. Theoretically, the shot noise level of our interferometer is 1/M of the conventional delayed heterodyne interferometer, where M is the number of wavelength divisions of the spectral interference. In our simulation experiment, the shot noise was reduced 20 dB from the conventional delayed heterodyne interferometer. This technique will reduce the image-acquisition time of optical reflectometry that uses incoherent light.

Original languageEnglish
Pages (from-to)4777-4781
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume39
Issue number8
Publication statusPublished - 2000 Aug 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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