Abstract
— Cryogenic CMOS controller and Superconducting processors for scalable Quantum Computing are pivotal technological advancements for cryogenic computing. However, energy-efficient data link from cryogenic operations to room temperature applications remains to be developed. In this work, we report on the development of high-speed Cryogenic VCSEL with material design of gain-cavity alignment around 40 K and oxide-aperture of 6 µm operated from 2.8 K to 300 K. In addition, we have established on-wafer cryogenic microwave electrical and optical probing system for performing accurate measurement calibration. Cryo-VCSELs at 2.8 K and 40 K with the record Laser Pout > 13 mW, high L-I linearity up to I/Ith > 125 and bandwidth f−3dB > 50 GHz are measured. Furthermore, these devices demonstrate high-speed optical data link of NRZ = 64 Gb/s with TDEC < 3 dB and 112 Gb/s PAM-4 with TDECQ = 2.56 dB at 7 mA operating current.
Original language | English (US) |
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Article number | 2400310 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 60 |
Issue number | 5 |
DOIs | |
State | Published - 2024 |
Externally published | Yes |
Keywords
- Vertical-cavity surface-emitting lasers (VCSEL)
- cryogenics
- data transfer
- high speed modulation
- optical interconnects
- quantum computing
- superconducting circuits
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering