High-Q Si3N4 Ring Resonators for Locking 780nm GaAs-Based Distributed Feedback Laser

Sinclair, M. et al. (2019) High-Q Si3N4 Ring Resonators for Locking 780nm GaAs-Based Distributed Feedback Laser. In: 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 23-27 Jun 2019, ISBN 9781728104690 (doi:10.1109/CLEOE-EQEC.2019.8872725)

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Abstract

High-Q microring resonators have applications in gyroscopes, frequency comb generation, and feedback systems to control narrow linewidth integrated lasers [1–3]. This paper demonstrates the highest Q values measured for microring resonators at 780 nm wavelength. These sub mm integrated cavities can be used to provide an error signal for locking a distributed feedback laser (DFB), Fig. 1(a), using the Pound-Drever-Hall (PDH) method. High stability DFBs can also be achieved using a micro-electro-mechanical system (MEMS) cell containing 87 Rb vapour and taking advantage of the absorption line at 780.24 nm. This provides an absolute reference for locking the laser but only to the 87 Rb transition wavelengths. The microring resonator can be tailor made for any wavelength but is susceptible to thermal effects; this could in part be overcome using a top cladding with a thermo-optic coefficient that counteracts that of the waveguide core.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hild, Professor Stefan and Millar, Dr Ross and Sinclair, Mr Martin and Mills, Mr Gordon and Ternent, Dr Gary and Casey, Mr Brendan and Mirando, Mr Francesco and Paul, Professor Douglas and Sharp, Mr Oliver and Bayley, Mr Joseph and Gallacher, Dr Kevin
Authors: Sinclair, M., Gallacher, K., Millar, R.W., Bayley, J.C., Sharp, O., Mirando, F., Ternent, G., Mills, G., Casey, B., Hild, S., and Paul, D.J.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
ISBN:9781728104690
Copyright Holders:Copyright © 2019 IEEE
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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