Electroabsorption Modulated Laser Based on Identical Epitaxial Layer and Transmission Line Technology

Al-Moathin, A., Ye, S. , Watson, S. , Di Gaetano, E. , Al-Taai, Q. R. A. , Eddie, I., Li, C., Hou, L. , Kelly, A. and Marsh, J. H. (2021) Electroabsorption Modulated Laser Based on Identical Epitaxial Layer and Transmission Line Technology. In: CLEO/Europe-EQEC 2021, Munich, Germany, 21-25 Jun 2021, ISBN 9781665418768 (doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542103)

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Low-cost solutions for delivering high communication bandwidths in both short- and long-haul systems are urgently required. Electroabsorption modulated lasers (EMLs), comprising a distributed feedback (DFB) laser and electroabsorption modulator (EAM), can address this. They are compact and offer a high modulation speed with low drive voltage, low chirp, and high extinction ratio [1] . To the best of our knowledge, the EAM in EMLs based on identical epitaxial layer technology has so far been configured with a lumped electrode. This can take the form of either a circular-pad, a rectangular-pad or the centre electrode of a ground-signal-ground (GSG) configuration. All result in a high capacitance, which in turn limits the modulation speed. Although the GSG choice has a similar configuration to that of a coplanar waveguide (CPW), it still behaves as a lumped electrode because of the lack of impedance matching. A planarized film of low- k material can be used to reduce the capacitance, however standard methods such as Benzocyclobutene or polyimide-based planarization are very difficult to implement as they are incompatible with many photonic integration steps [2] .

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Al-Taai, Dr Qusay Raghib Al and Watson, Dr Scott and Marsh, Professor John and Al-Moathin, Mr Ali and Kelly, Professor Anthony and Hou, Dr Lianping and Di Gaetano, Mr Eugenio and Ye, Dr Shengwei
Authors: Al-Moathin, A., Ye, S., Watson, S., Di Gaetano, E., Al-Taai, Q. R. A., Eddie, I., Li, C., Hou, L., Kelly, A., and Marsh, J. H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Copyright Holders:Copyright © 2021 IEEE
First Published:First published in 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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