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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Optical transmission modules for multi-channel superconducting quantum interference device readouts.

Jin-Mok Kim1, Hyukchan Kwon1, Kwon-kyu Yu1

  • 1Brain Cognition Measurement Center, Korea Research Institute of Standards and Science, Daejeon 305-600, South Korea.

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|January 7, 2014
PubMed
Summary
This summary is machine-generated.

We created an optical transmission module to send Superconducting Quantum Interference Device (SQUID) data over a single cable, maintaining low noise levels for advanced magnetoencephalography systems.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience Instrumentation

Background:

  • Superconducting Quantum Interference Devices (SQUID) are crucial for magnetoencephalography (MEG).
  • Efficient and high-fidelity data transmission is essential for SQUID-based systems.

Purpose of the Study:

  • To develop an optical transmission module for SQUID readout data.
  • To enable high-speed, low-noise data transfer from SQUID sensors to a computer via a single optical cable.

Main Methods:

  • Designed a module with a 16-channel analog-to-digital converter (ADC), digital-noise filter, and serial transmitter.
  • The ADC digitizes SQUID data at 1.5 kSample/s (8-bit channel, 24-bit voltage).
  • A digital-noise filter reduces noise, and a transmitter sends data over a single optical cable.

Main Results:

  • The developed module successfully transmitted SQUID readout data.
  • Integration into a 152-channel SQUID magnetoencephalography system was achieved.
  • The system maintained a low field noise level of 3 fT/√Hz at 100 Hz.

Conclusions:

  • The optical transmission module provides an effective solution for SQUID data transfer.
  • This technology supports high-performance SQUID-based magnetoencephalography systems.
  • The module facilitates improved data acquisition in neuroscience research.