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@INPROCEEDINGS{Mutum:1032097,
      author       = {Mutum, Santosh and Grewing, Christian and Cabrera Galicia,
                      Alfonso Rafael and Schlösser, Mario and Vliex, Patrick and
                      Chava, Phanish and van Waasen, Stefan},
      title        = {{P}erformance and signal quality analysis of a photonic
                      link from room temperature to 6{K} using laser-photodiodes},
      reportid     = {FZJ-2024-05996},
      year         = {2024},
      abstract     = {Quantum computers rely on qubits, which are sensitive to
                      temperature and are kept in cryogenic environments to reduce
                      thermal disruptions. Maintaining stable operation at
                      millikelvin temperatures is essential, requiring minimal
                      power consumption and electronic interference in the
                      cryogenic chamber, along with optimal thermal isolation.
                      Effectively controlling qubits requires high-frequency
                      signals with substantial data bandwidth. In large-scale
                      quantum systems operating at low temperatures, establishing
                      robust signal connections between the cooled core and
                      external components at room temperature is crucial.
                      Traditional coaxial cable connections encounter limitations
                      when scaling to thousands of qubits due to cabling
                      bottlenecks. A promising alternative is the use of a compact
                      multiplexed photonic link utilizing a laser-photodiode
                      setup, which also incorporates reduced thermal conductivity.
                      Given that the current signal in superconducting qubits is
                      crucial for encoding and manipulating quantum information,
                      higher-quality signals with low noise serve as a key element
                      in the control and operation of the qubit, allowing for the
                      execution of quantum algorithms in a superconducting quantum
                      computing system. Within the project QSolid - Quantum
                      Computer in the Solid State, funded by the Federal Ministry
                      of Education and Research (BMBF), this study focuses on
                      setting up unbiased low optical loss photonic links in a
                      cryostat to obtain higher-quality signal with a low thermal
                      impact profile. The research demonstrates the performance of
                      Silicon and InGaAs photodiodes at temperatures as low as 6K,
                      along with frequency responses, paving the way for
                      measurements down to millikelvin levels. The current setup
                      achieves a commendable low optical loss of -1.5 dB.},
      month         = {Sep},
      date          = {2024-09-01},
      organization  = {Applied Superconductivity Conference
                       2024, Salt Lake City (USA), 1 Sep 2024
                       - 6 Sep 2024},
      subtyp        = {After Call},
      cin          = {ZEA-2},
      cid          = {I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {5223 - Quantum-Computer Control Systems and Cryoelectronics
                      (POF4-522)},
      pid          = {G:(DE-HGF)POF4-5223},
      typ          = {PUB:(DE-HGF)24},
      doi          = {10.34734/FZJ-2024-05996},
      url          = {https://juser.fz-juelich.de/record/1032097},
}