Simulation of an AlGaInAs/InP electro-absorption modulator monolithically integrated with sidewall grating distributed feedback laser by quantum well intermixing

Sun, X. et al. (2022) Simulation of an AlGaInAs/InP electro-absorption modulator monolithically integrated with sidewall grating distributed feedback laser by quantum well intermixing. Photonics, 9(8), 564. (doi: 10.3390/photonics9080564)

Abstract

A novel AlGaInAs/InP electro-absorption modulated laser (EML) with a simple fabrication process is proposed, in which the electro-absorption modulator (EAM) has a 10 nm blueshift induced by quantum well intermixing (QWI) and is monolithically integrated with a sidewall grating distributed-feedback (DFB) laser working at 1.55 μm wavelength. The extent of the QWI process is characterized by a diffusion length. The quantum confined Stark effect (QCSE) is simulated in terms of extinction ratio (ER) and chirp for bias electric fields from 0 kV/cm to 200 kV/cm and for different amounts of intermixing. The results indicate that for a 150 µm-long EAM with a 10 nm blueshift induced by QWI, an ER of 40 dB is obtained at 2.5 V reverse bias with no penalty in chirp compared to an as-grown quantum well (QW) and the insertion loss at 0 V bias is 0.11 dB for 1.55 µm operation wavelength. The simulated –3 dB bandwidth of the electrical to optical power response is 22 GHz.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sun, Yiming and Cheng, Weiqing and Marsh, Professor John and Sun, Xiao and Al-Moathin, Mr Ali and Hou, Dr Lianping and Ye, Dr Shengwei
• Authors: Sun, X., Cheng, W., Sun, Y., Ye, S., Al-Moathin, A., Huang, Y., Zhang, R., Liang, S., Qiu, B., 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: Photonics
• Publisher: MDPI
• ISSN: 2304-6732
• ISSN (Online): 2304-6732
• Published Online: 11 August 2022
• Copyright Holders: Copyright © 2022 The Authors
• First Published: First published in Photonics 9(8): 564
• Publisher Policy: Reproduced under a Creative Commons License

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
302617		Optically controlled THz phased array antennas	John Marsh	Engineering and Physical Sciences Research Council (EPSRC)	EP/R042578/1	ENG - Electronics & Nanoscale Engineering