A Compact High-Efficient Equivalent Circuit Model of Multi-Quantum-Well Vertical-Cavity Surface-Emitting Lasers for High-Speed Interconnects

Shanglin Li,David Rolston,Odile Liboiron-Ladouceur,Mohammadreza Sanadgol Nezami

doi:10.3390/app10113865

Shanglin Li, David Rolston + Show 2 more

Open Access

https://doi.org/10.3390/app10113865

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Journal: Applied sciences	Publication Date: Jun 2, 2020
Citations: 5	License type: CC BY 4.0

Affiliation: McGill University

Abstract

Due to their low power consumption, high modulation speed, and low cost, vertical-cavity surface-emitting lasers (VCSEL) dominate short-reach data communications as the light source. In this paper, we propose a compact equivalent circuit model with noise effects for high-speed multi-quantum-well (MQW) VCSELs. The model comprehensively accounts for the carrier and photons dynamisms of a MQW structure, which includes separate confinement heterostructure (SCH) layers, barrier (B) layers, and quantum well (QW) layers. The proposed model is generalized to various VCSEL designs and accommodates a flexible number of quantum wells. Experimental validation of the model is performed at 25 Gb/s with a self-wire-bonded 850 nm VCSEL.

Highlights

The growth of Internet services, such as streaming video, social networking, and cloud computing has created the fast-growing need for datacenters
The number of rate equations are proportional to the number of quantum well (QW) such that the model cannot be generalized to all vertical-cavity surface-emitting lasers (VCSEL) designs [12,13], and are not suitable for the system-level simulation of VCSEL-based fiber links
The proposed model accommodates a flexible number of quantum wells (QW’s), which provides the freedom to simulate an arbitrary VCSEL in the system-oriented opto-electronic simulation platform

Summary

Introduction

The growth of Internet services, such as streaming video, social networking, and cloud computing has created the fast-growing need for datacenters. A lot of development works have been carried out in the fabrication of VCSELs [4,5,6] For these diverse design structures, the number of quantum wells differs. To facilitate VCSEL design, fabrication and evaluation, an accurate VCSEL model, accommodating the variable quantum well (QW) number, needs to be built in an electronic-photonic co-simulation platform. We propose a versatile compact equivalent circuit model with noise effects for the MQW VCSEL. The proposed model accommodates a flexible number of quantum wells (QW’s), which provides the freedom to simulate an arbitrary VCSEL in the system-oriented opto-electronic simulation platform.

VCSEL Structure and Dynamism Analysis

Parasitic

Compact Rate Equations

VCSEL Equivalent Circuit Model

Results and Discussion

Conclusions