Sun, X., Ye, S. , Qiu, B., Xiong, J., Liu, X., Marsh, J. and Hou, L. (2021) Design and optimization of 1.55 μm AlGaInAs MQW polarization mode controllers. Photonics, 8(10), 422. (doi: 10.3390/photonics8100422)
Text
253175.pdf - Published Version Available under License Creative Commons Attribution. 4MB |
Publisher's URL: https://www.mdpi.com/2304-6732/8/10/422
Abstract
A 1.55 μm AlGaInAs multi-quantum-well (MQW) ridge waveguide polarization mode controller (PMC) is proposed. The design is based on an asymmetric half-ridge waveguide structure in which the ridge is shallow etched on one side and has a deeply etched mesa structure on the other side. The Finite-Element Method (FEM) was used to simulate the PMC and optimize its structural parameters comprehensively. Furthermore, the fabrication tolerances were also investigated in detail. The optimized PMC has a polarization conversion efficiency (PCE) of around 92.5% with a half-beat length of 1250 μm. When the PMC length was fixed at 1250 μm, to achieve a PCE derivation less than 8%, the tolerances for the ridge waveguide width and shallow etch height were 1.60 μm to 1.65 μm and 2.13 μm to 2.18 μm, respectively. In order to reduce interband gap absorption loss, the quantum well intermixing (QWI) technique was used in the model to realize a blueshift (200 nm) in the PMC. QWI is a simple, flexible, and low-cost technique for fabricating a PMC integrated with a laser diode and reduces parasitic reflections, which would otherwise degrade the overall performance. QWI also eliminates MQW material anisotropy and alleviates the birefringence effect without the need for regrowth, achieving nearly uniform properties as a bulk material.
Item Type: | Articles |
---|---|
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Ye, Dr Shengwei and Liu, Professor Xuefeng and Sun, Xiao and Marsh, Professor John and Hou, Dr Lianping |
Creator Roles: | |
Authors: | Sun, X., Ye, S., Qiu, B., Xiong, J., Liu, X., Marsh, J., and Hou, L. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Photonics |
Publisher: | MDPI |
ISSN: | 2304-6732 |
ISSN (Online): | 2304-6732 |
Published Online: | 01 October 2021 |
Copyright Holders: | Copyright © 2021 The Authors |
First Published: | First published in Photonics 8(10): 422 |
Publisher Policy: | Reproduced under a Creative Commons License |
University Staff: Request a correction | Enlighten Editors: Update this record