High-Resolution AWG-based fiber bragg grating interrogator

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A novel InP-based monolithically integrated multiwavelength detector is used as the central part of a fiber Bragg grating interrogator unit. We have designed the arrayed waveguide grating (AWG) in the device such that at least two detectors have a significant signal at any wavelength being measured. Consequently, the measurement resolution is increased, while keeping the area of device small. We demonstrate the resolution of the measurement to be 0.32 pm over a working range of 10 nm. The corresponding relative resolution of 0.003% is to our knowledge the best reported to date in an integrated interrogator.
Original languageEnglish
Pages (from-to)2203-2206
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number20
Publication statusPublished - 15 Oct 2016


  • Arrayed waveguide gratings
  • Bragg gratings
  • Detectors
  • Passband
  • Signal resolution
  • Temperature measurement
  • Wavelength measurement
  • Photonic integrated circuits
  • fiber Bragg grating
  • optical waveguide filters


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