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On-chip Fourier transform spectrometer on silicon-on-sapphire

  • Elham Heidari*
  • , Xiaochuan Xu
  • , Chi Jui Chung
  • , Ray T. Chen
  • *Corresponding author for this work
  • University of Texas at Austin
  • Omega Optics Inc.

Research output: Contribution to journalArticlepeer-review

Abstract

We designed and experimentally demonstrated an on-chip Fourier transform spectrometer on silicon-on-sapphire. The spectrometer comprises an array of twelve Mach–Zehnder interferometers (MZIs) with linearly increasing optical path delays between MZI arms. The propagation loss of 5.2 dB/cm has been experimentally observed for the strip waveguides. The retrieval of an optical spectrum is demonstrated with an inter-band cascade laser centered at 3.3 μm. The resolution is better than 10 cm−1.

Original languageEnglish
Pages (from-to)2883-2886
Number of pages4
JournalOptics Letters
Volume44
Issue number11
DOIs
StatePublished - 1 Jun 2019
Externally publishedYes

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