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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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A high-precision detection method for laser time transfer based on a single-photon avalanche detector array.

Yurong Wang¹, Xue Li¹, Weiping Luo¹

¹State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China.

The Review of Scientific Instruments

|October 1, 2022

Summary

This summary is machine-generated.

This study demonstrates that SPAD array detectors significantly improve space-ground laser time transfer precision. Achieving order-of-magnitude enhancements, SPAD arrays offer superior performance for high-precision time synchronization systems.

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Area of Science:

Physics
Optical Engineering
Metrology

Background:

High-precision time synchronization is crucial for advanced applications like space-ground optical clocks.
Traditional laser time transfer systems often rely on single-pixel single-photon avalanche detectors (SPADs).

Purpose of the Study:

To investigate the performance enhancement of SPAD array devices over single-pixel SPADs for space-ground laser time transfer.
To establish a new detection method for high-precision laser time transfer applications.

Main Methods:

Experimental demonstration of SPAD array detector performance.
Comparison of detection precision and time deviation (TDEV) between SPAD arrays and single-pixel SPADs.

Main Results:

SPAD array devices demonstrated an order-of-magnitude improvement in detection precision and TDEV compared to single-pixel SPADs.
Achieved 2.4 ps root mean square precision.
Achieved 0.25 ps TDEV over an averaging time of 1000 s.

Conclusions:

SPAD array detectors offer a significant advancement for laser time transfer.
This technology provides a new, high-performance detection method for applications requiring precise time synchronization, such as space-ground optical clocks.