Microcavity VCSELs for cryogenic single-mode optical data link to achieve 28 fJ/bit at 136 Gbps
Abstract
We report on the development of microcavity vertical-cavity surface-emitting lasers (VCSELs) for cryogenic operation based on a 1/2-λ cavity and a <2-μm oxide aperture. Optical spectra show single-mode laser operation with a superior side-mode suppression ratio of 41 dB (3 K) and 36 dB (40 K) up to 8 mA. The microcavity laser operated at low bias current, I = 1.5 mA, demonstrates a 136 Gbps optical link at 40 K to achieve an ultralow energy consumption of 28 fJ/bit. Thus, high-speed cryogenic microcavity VCSELs are a cost-effective solution to deliver a higher energy-efficient optical data link.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (5)
Zetai Liu
Nick Holonyak, Jr. Micro and Nanotechnology Laboratory, Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign , 208 N Wright St, Urbana, Illinois 61801,
Derek Chaw
Nick Holonyak, Jr. Micro and Nanotechnology Laboratory, Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign , 208 N Wright St, Urbana, Illinois 61801,
Haonan Wu
Institute for Innovative Materials and Energy School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 China
Yulin He
Nick Holonyak, Jr. Micro and Nanotechnology Laboratory, Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign , 208 N Wright St, Urbana, Illinois 61801,
Milton Feng
Nick Holonyak, Jr. Micro and Nanotechnology Laboratory, Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign , 208 N Wright St, Urbana, Illinois 61801,