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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 35 — Dec. 10, 2008
  • pp: 6535–6542

Spectral measurements with superresolution based on periodic modulation of the spectrum

Naum K. Berger  »View Author Affiliations

Applied Optics, Vol. 47, Issue 35, pp. 6535-6542 (2008)

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We extend the approach recently applied for achieving spatial and temporal superresolution to spectral measurements with superresolution. The light passes previously through a filter with a periodic spectral response. Owing to the spectral modulation, the parts of the spectrum Fourier transform are shifted and transmitted through the passband of the Fourier transform of the spectrometer instrumental function. Thus, all the parts of the spectrum Fourier transform are recorded by the spectrometer and then restored by a special procedure. An inverse Fourier transform gives the spectrum restored with superresolution. We numerically demonstrate more than tenfold enhancement of the resolution by using a sampled fiber Bragg grating for spectral modulation.

© 2008 Optical Society of America

OCIS Codes
(070.4790) Fourier optics and signal processing : Spectrum analysis
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(070.2615) Fourier optics and signal processing : Frequency filtering
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:

Original Manuscript: June 25, 2008
Revised Manuscript: September 19, 2008
Manuscript Accepted: October 20, 2008
Published: December 3, 2008

Naum K. Berger, "Spectral measurements with superresolution based on periodic modulation of the spectrum," Appl. Opt. 47, 6535-6542 (2008)

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