Direct modulation of electrically pumped coupled microring lasers
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 04, 2022
- Source ID
- 10.1364/oe.442076
Entities
People
- Chi Xu
- Demetrios N. Christodoulides
- Mercedeh Khajavikhan
- Patrick Likamwa
- William E. Hayenga
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Defense Advanced Research Projects Agency
- National Science Foundation
- Office of Naval Research
- University of Central Florida
- University of Southern California