Abstract
Superconducting processor based on single flux quantum (SFQ) technology is a promising solution for cryogenic computing with high-speed operation at extremely low power. However, energy-efficient data link from $\sim 4\text{K}$ operation to room temperature (RT) users has been remained as a key challenger to be resolved. In this work, we report the 5K performance of 51.56 Gb/s PAM-4 optical data link from a VCSEL, coupled by free-space optics inside cryostat to RT receiver through cryostat optical window. Finally, a superconducting bit pattern generator (BPG) is used to modulate a VCSEL at 4 K: 12.5 Gb/s NRZ error-free optical data transmission and 20 Gb/s NRZ open eye-diagrams are demonstrated via an OM4 fiber coupled directly to the VCSEL at 4 K inside cryostat and linked to the outside receiver at RT.
Original language | English (US) |
---|---|
Journal | IEEE Journal of Quantum Electronics |
Volume | 58 |
Issue number | 2 |
DOIs | |
State | Published - Apr 1 2022 |
Externally published | Yes |
Keywords
- Vertical-cavity surface-emitting lasers
- cryogenics
- data transfer
- high speed modulation
- optical interconnects
- supercomputers
- superconducting circuits
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering