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Thermally stable hybrid cavity laser based on silicon nitride gratings

  • S. Iadanza
  • , A. P. Bakoz
  • , P. K. J. Singaravelu
  • , D. Panettieri
  • , S. A. Schulz
  • , G. C. R. Devarapu
  • , S. Guerber
  • , C. Baudot
  • , F. Boeuf
  • , S. Hegarty
  • , John William Whelan-Curtin

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we show the experimental results of a thermally stable Si3N4 external cavity (SiN EC) laser with high power output and the lowest SiN EC laser threshold to our knowledge. The device consists of a 250 μm sized reflective semiconductor optical amplifier butt-coupled to a passive chip based on a series of Si3N4 Bragg gratings acting as narrow reflectors. A threshold of 12 mA has been achieved, with a typical side-mode suppression ratio of 45 dB and measured power output higher than 3 mW. Furthermore, we achieved a mode-hop free-lasing regime in the range of 15–62 mA and wavelength thermal stability up to 80°C. This solves the challenges related to cavity resonances’ thermal shift and shows the possibility for this device to be integrated in dense wavelength-division multiplexing (WDM) and heat-intensive optical interconnects technologies.
Original languageEnglish
Pages (from-to)E218-E223
JournalApplied Optics
Volume57
Issue number22
Early online date31 Jul 2018
DOIs
Publication statusPublished - 1 Aug 2018

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