Interleaved Silicon Nitride AWG Spectrometers

B. Imran Akca, Christopher R. Doerr

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

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
Pages (from-to)90-93
JournalIEEE Photonics Technology Letters
Volume31
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

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

Cite this

Akca, B. Imran ; Doerr, Christopher R. / Interleaved Silicon Nitride AWG Spectrometers. In: IEEE Photonics Technology Letters. 2019 ; Vol. 31, No. 1. pp. 90-93.
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Interleaved Silicon Nitride AWG Spectrometers. / Akca, B. Imran; Doerr, Christopher R.

In: IEEE Photonics Technology Letters, Vol. 31, No. 1, 01.01.2019, p. 90-93.

Research output: Contribution to JournalArticleAcademicpeer-review

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AB - 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.

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