Speckle-based spectrometer

Research output: Contribution to journalJournal articleResearchpeer-review


A novel spectrometer concept is analyzed and experimentally verified. The method relies on probing the speckle displacement due to a change in the incident wavelength. A rough surface is illuminated at an oblique angle, and the peak position of the covariance between the speckle patterns observed in the far field with the two wavelengths reveals the wavelength change. A spectral resolution of 100 Mhz is argued to be achievable.
Original languageEnglish
JournalOptics Letters
Issue number14
Pages (from-to)3264-3267
Number of pages4
Publication statusPublished - 2015


  • Spectroscopy
  • Speckle
  • Spectrometers
  • Statistical optics

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