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High-Precision Single-Photon Laser Time Transfer with Temperature Drift Post-Compensation.

Wendong Meng1,2, Yurong Wang1, Kai Tang2

  • 1State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.

Sensors (Basel, Switzerland)
|November 25, 2020
PubMed
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This study introduces a post-processing method to compensate for temperature-induced delays in laser time transfer systems. The technique significantly improves time stability and precision, crucial for global synchronization and space applications.

Area of Science:

  • Precision Metrology
  • Optical Physics
  • Time and Frequency Transfer

Background:

  • Laser time transfer is vital for global time synchronization.
  • Temperature fluctuations can introduce significant delays in electronic and optical systems, impacting accuracy.
  • Existing methods often require hardware modifications to address temperature drift.

Discussion:

  • A novel post-processing method is presented to compensate for temperature-induced system delay without hardware changes.
  • The method analyzes temperature drift and its impact on system stability and precision.
  • Comparisons are made between compensated and uncompensated system performance.

Key Insights:

  • Propagation delay drift up to 240 ps due to temperature changes was effectively compensated.
Keywords:
avalanche photodiodeslaser ranginglaser time transfersingle-photon detectiontemperature drift compensation

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  • The temperature drift coefficient was reduced from ~20.0 ps/°C to ~0.05 ps/°C.
  • System precision improved to ~2 ps from ~11 ps over 80,000 seconds.

    • Outlook:

    • This method offers significant compensation for single-photon laser time transfer system propagation drift.
    • It provides a pathway for establishing ultra-stable laser time transfer links, particularly for space applications.
    • Further research can explore its application in other high-precision timing systems.