Liquid helium temperature high-speed optical data link for superconducting computing
Wu, Haonan
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https://hdl.handle.net/2142/127458
Description
Title
Liquid helium temperature high-speed optical data link for superconducting computing
Author(s)
Wu, Haonan
Issue Date
2024-12-10
Director of Research (if dissertation) or Advisor (if thesis)
Feng, Milton
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Cryogenic Temperature
VCSEL
High-Speed Optical Data Link
Abstract
The rapid growth of artificial intelligence (AI), machine learning (ML), and quantum computing demands advanced data transmission solutions that overcome limitations in traditional copper interconnects, particularly at deep cryogenic temperatures. Oxide-based vertical-cavity surface-emitting lasers (VCSELs) offer high modulation bandwidth and energy efficiency, making them ideal for cryogenic temperature data link applications.
This thesis introduces a high-speed cross-temperature packaging technique for fabricated cryogenic oxide-VCSELs, achieving reliable operation from 300 Kelvin down to 2.6 Kelvin. Integration with single-flux-quantum (SFQ) superconducting processor enables error-free data transmission at 10–20 Gbps, and up to 90 Gbps PAM-4 Cryo-VCSEL optical link demonstrates the potential of future superconducting and quantum computing systems requiring low thermal leakage. Cryo-VCSELs thus emerge as critical components for ultra-low-temperature, high-speed, and energy-efficient data transmission. Future efforts will refine device structures and thermal models to further enhance performance for cross-temperature applications.
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