Year: 2022
Type: preprint
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 μm 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.
Source: arXiv (Cornell University)
Language: English
Topic: Photonic and Optical Devices
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Awards: G141174884, G155652732, EAGER: Fundamental Considerations in Using Non-Hermitian Microscale Resonant Optical Structures for Rotation Sensing, G218087015, G2727271265, G3048516157, G3141641755, CCRI: ENS: Collaborative Research: ns-3 Network Simulation for Next-Generation Wireless, High-speed and minimally photo-damaging STED microscopy using nanolaser arrays, G5703086870, G5708415048, G5972442391, G6098521345, CAREER: Novel Photonic Structures Using Non-Hermitian Exceptional Points, G6795672537, G6838567687, G7452299184, G7565014002, G8006577219, G8876996369
OpenAlex ID: W4221146150