Interleaved Silicon Nitride AWG Spectrometers

B. Imran Akca, Christopher R. Doerr

Research output: Contribution to JournalArticleAcademicpeer-review


Interleaved arrayed waveguide gratings (AWGs) have a great potential in providing large channel counts and narrower channel spacings for many applications, including optical communication, spectroscopy, and imaging. Here, a 75-channel silicon nitride based interleaved AWG was experimentally demonstrated. The design is comprised of a 3-channel primary AWG with 1 nm of resolution and three 25-channel secondary AWGs each with 3 nm of resolution. The final device has a spectral resolution of 1 nm over 75 nm bandwidth centered at 1550 nm. Its performance is compared with a conventional AWG spectrometer with 75 nm of bandwidth and 1 nm of resolution. The interleaved AWG demultiplexer showed lower crosstalk and better uniformity in addition to being two times smaller than the conventional design.
Original languageEnglish
Article number8554299
Pages (from-to)90-93
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number1
Publication statusPublished - 1 Jan 2019


  • C-band
  • Integrated optics
  • arrayed waveguide grating
  • demultiplexer
  • interleaver
  • silicon nitride


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