Direct Modulation of Electrically Pumped Coupled Microring Lasers
Optics
2022-03-21 v1
Abstract
We demonstrate how the presence of gain-loss contrast between two coupled identical resonators can be used as a new degree of freedom to enhance the modulation frequency response of laser diodes. An electrically pumped microring laser system with a bending radius of 50 {\mu}m is fabricated on an InAlGaAs/InP MQW p-i-n structure. The room temperature continuous wave (CW) laser threshold current of the device is 27 mA. By adjusting the ratio between the injection current levels in the two coupled microrings, our experimental results clearly show a bandwidth improvement by up to 1.63 times the fundamental resonant frequency of the individual device. This matches well with our rate equation simulation model.
Cite
@article{arxiv.2203.09955,
title = {Direct Modulation of Electrically Pumped Coupled Microring Lasers},
author = {Chi Xu and William E. Hayenga and Demetrios N. Christodoulides and Mercedeh Khajavikhan and Patrick Likamwa},
journal= {arXiv preprint arXiv:2203.09955},
year = {2022}
}