High-resolution Fourier-transform spectrometer chip with microphotonic silicon spiral waveguides Academic Article uri icon

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abstract

  • We report a stationary Fourier-transform spectrometer chip implemented in silicon microphotonic waveguides. The device comprises an array of 32 Mach-Zehnder interferometers (MZIs) with linearly increasing optical path delays between the MZI arms across the array. The optical delays are achieved by using Si-wire waveguides arranged in tightly coiled spirals with a compact device footprint of 12 mm2. Spectral retrieval is demonstrated in a single measurement of the stationary spatial interferogram formed at the output waveguides of the array, with a wavelength resolution of 40 pm within a free spectral range of 0.75 nm. The phase and amplitude errors arising from fabrication imperfections are compensated using a transformation matrix spectral retrieval algorithm.

authors

  • Velasco, Aitor V
  • Cheben, Pavel
  • Bock, Przemek J
  • Delâge, André
  • Schmid, Jens H
  • Lapointe, Jean
  • Janz, Siegfried
  • Calvo, María L
  • Xu, Dan-Xia
  • Florjańczyk, Mirosław
  • Vachon, Martin

publication date

  • March 1, 2013