Thermally stable hybrid cavity laser based on silicon nitride gratings
Iadanza, Simone; Bakoz, Andrei P.; Singaravelu, Praveen K. J.; Panettieri, Danilo; Schulz, Stefan; Devarapu, Ganga Chinna Rao; Guerber, Sylvain; Baudot, Charles; Boeuf, Frédéric; Hegarty, Stephen; O'Faolain, Liam
Date:
2018-07-31
Copyright:
© 2018, Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
Full text restriction information:
Access to this article is restricted until 12 months after publication by request of the publisher.
Restriction lift date:
2019-07-31
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. and O’Faolain, L. (2018) ‘Thermally stable hybrid cavity laser based on silicon nitride gratings’, Applied Optics, 57(22), pp. 218-223. doi:10.1364/AO.57.00E218
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.
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