EML based on identical epitaxial layer, side-wall grating and HSQ planarization

Al-Moathin, A. et al. (2022) EML based on identical epitaxial layer, side-wall grating and HSQ planarization. IEEE Photonics Technology Letters, 34(6), pp. 317-320. (doi: 10.1109/LPT.2022.3155730)

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Abstract

We present an electroabsorption modulated laser based on an identical epitaxial scheme, side-wall grating, on-chip microwave probe interface, and a new low-permittivity planarization method. The modulation speed is significantly increased by reducing the electrode capacitance by planarizing with a 5-μm-thick HSQ layer. Furthermore, implementing the electrode with a direct ground-signal-ground probe interface provides a straightforward interconnection that obviates the need for an external circuit and bonding wires. The device operates at 1565 nm wavelength with stable single-mode lasing, no mode-hopping, and a side mode suppression ratio above 35 dB. An extinction ratio of 19.5 dB was recorded at the maximum modulator bias of –4 V. The electrical to optical power response of the modulated signal at –3-dBo demonstrated a 19 GHz bandwidth at an extinction ratio of 7 dB, which supports error-free data transmission up to 27 Gbit/s.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Watson, Dr Scott and Tang, Song and Di Gaetano, Mr Eugenio and Ye, Dr Shengwei and Li, Dr Chong and Al-Taai, Dr Qusay Raghib Al and Marsh, Professor John and Hou, Dr Lianping and Al-Moathin, Mr Ali and Kelly, Professor Anthony
Authors: Al-Moathin, A., Watson, S., Tang, S., Ye, S., Di Gaetano, E., Al-Taai, Q. R. A., Eddie, I., Huang, Y., Zhang, R., Li, C., Hou, L., Kelly, A., and Marsh, J. H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Photonics Technology Letters
Publisher:IEEE
ISSN:1041-1135
ISSN (Online):1941-0174
Published Online:02 March 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in IEEE Photonics Technology Letters 34(6): 317-320
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
172610External engagement manager: CDT Photonic Integration for Advanced Data StorageJohn MarshEngineering and Physical Sciences Research Council (EPSRC)EP/L015323/1ENG - Electronics & Nanoscale Engineering
302617Optically controlled THz phased array antennasJohn MarshEngineering and Physical Sciences Research Council (EPSRC)EP/R042578/1ENG - Electronics & Nanoscale Engineering