Enhanced modulation characteristics in broken symmetric coupled microring lasers
Abstract
The dynamical behavior of broken symmetric coupled cavity lasers is theoretically investigated. The frequency response of this class of lasers is obtained using small signal analysis under direct modulation. Our model predicts a modulation bandwidth enhancement as a broken symmetric laser, operating in the parity-time (PT) symmetry and non-PT symmetry domains. This theoretical prediction is numerically examined in a laser system based on an InGaAs quantum dot platform. Our results clearly show that in these structures, in addition to the injection current, the gain-loss contrast can be used as a new degree of freedom in order to control the characteristic poles of the frequency response function.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 19, 2020
- Source ID
- 10.1364/oe.394830
Entities
People
- Chi Xu
- Demetrios N. Christodoulides
- Hossein Hodaei
- 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