Table of Contents
International Scholarly Research Notices
Volume 2014 (2014), Article ID 627165, 10 pages
http://dx.doi.org/10.1155/2014/627165
Research Article

Integrated Duo Wavelength VCSEL Using an Electrically Pumped GaInAs/AlGaAs 980 nm Cavity at the Bottom and an Optically Pumped GaInAs/AlGaInAs 1550 nm Cavity on the Top

1Electrical and Electronic Engineering Department, American International University-Bangladesh, Dhaka 1213, Bangladesh
2Electrical and Electronic Engineering Department, Northern University Bangladesh, Dhaka 1213, Bangladesh
3Electrical and Electronic Engineering Department, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh

Received 10 April 2014; Revised 17 August 2014; Accepted 20 August 2014; Published 29 October 2014

Academic Editor: Zhihao Chen

Copyright © 2014 Samiha Ishrat Islam et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this work, an integrated single chip dual cavity VCSEL has been designed which comprises an electrically pumped 980 nm bottom VCSEL section fabricated using GaInAs/AlGaAs MQW active region and a 1550 nm top VCSEL section constructed using GaInAs/AlGaInAs MQW active region but optically pumped using half of the produced 980 nm light entering into it from the electrically pumped bottom cavity. In this design, the active region of the intracavity structure 980 nm VCSEL consists of 3 quantum wells (QWs) using Ga0.847In0.153As, 2 barriers using Al0.03Ga0.97As, and 2 separate confinement heterostructures (SCH) using the same material as the barrier. The active region of the top emitting 1550 nm VCSEL consists of 3 QWs using Ga0.47In0.52As, 2 barriers using Al0.3Ga0.17In0.53As, and 2 SCHs using the same material as the barrier. The top DBR and the bottom DBR mirror systems of the 1550 nm VCSEL section plus the top and bottom DBR mirror systems of the 980 nm VCSEL section have been formed using GaAs/Al0.8Ga0.2As. Computations show that the VCSEL is capable of producing 8.5 mW of power at 980 nm from the bottom side and 2 mW of power at the 1550 nm from top side.