Thermally stable hybrid cavity laser based on silicon nitride gratings
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.
Citation
Iadanza , S , Bakoz , A P , Singaravelu , P K J , Panettieri , D , Schulz , S A , Devarapu , G C R , Guerber , S , Baudot , C , Boeuf , F , Hegarty , S & Whelan-Curtin , J W 2018 , ' Thermally stable hybrid cavity laser based on silicon nitride gratings ' , Applied Optics , vol. 57 , no. 22 , pp. E218-E223 . https://doi.org/10.1364/AO.57.00E218
Publication
Applied Optics
Status
Peer reviewed
ISSN
1559-128XType
Journal article
Description
Funding: Science Foundation Ireland (SFI) (16/ERCS/3838, SFI12/RC/2276); Engineering and Physical Sciences Research Council (EPSRC) (EP/L017008/1, EP/L505079/1); H2020 LEIT Information and Communication Technologies (ICT) (COSMICC nr. 688516, H2020-ICT27-2015); H2020 European Research Council (ERC) (337508)Collections
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