Monolithically integrated AlGaInAs MQW polarization mode converter using a stepped height ridge waveguide

Sun, X. et al. (2022) Monolithically integrated AlGaInAs MQW polarization mode converter using a stepped height ridge waveguide. IEEE Photonics Journal, (doi: 10.1109/JPHOT.2022.3176547) (Early Online Publication)

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Abstract

An AlGaInAs multiple-quantum-well (MQW) polarization mode controller (PMC) using a stepped height ridge waveguide is presented, which is monolithically integrated with a sidewall grating distributed feedback laser using quantum well intermixing (QWI). QWI is used to create a 100 nm blueshift in the PMC and to eliminate the anisotropy and birefringence of the MQW structure. The PMC structure is modelled and optimized using a 3D full-vectorial Finite-Element Method package. The maximum polarization conversion efficiency (PCE) is around 96% for a 537-μm-long PMC operating a wavelength of 1550 nm. To maintain a PCE of ≥90%, the fabrication tolerances of the dry-etch corner and ridge waveguide widths are ± 0.05 μm and ± 0.03 μm respectively. The main advantages of the proposed design are that only a single step of MOPVE and two steps of dry etching are required for the whole integrated device, significantly reducing complexity and cost.

Item Type:Articles
Status:Early Online Publication
Refereed:Yes
Glasgow Author(s) Enlighten ID:Liu, Professor Xuefeng and Hou, Dr Lianping and Cheng, Weiqing and Marsh, Professor John and Sun, Xiao and Ye, Dr Shengwei
Authors: Sun, X., Ye, S., Cheng, W., Liang, S., Huang, Y., Qiu, B., Li, Z., Xiong, J., Liu, X., Marsh, J. H., and Hou, L.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Photonics Journal
Publisher:IEEE
ISSN:1943-0655
ISSN (Online):1943-0655
Published Online:20 May 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in IEEE Photonics Journal 2022
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
302617Optically controlled THz phased array antennasJohn MarshEngineering and Physical Sciences Research Council (EPSRC)EP/R042578/1ENG - Electronics & Nanoscale Engineering