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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Unknown weak light pulse measurement using time interval distribution photon counting.

Xinyi Zhu, Yurong Wang, Xue Li

|February 14, 2025

Summary

This summary is machine-generated.

This study introduces a novel method using interval distribution counting to accurately measure weak, non-synchronized light pulses. The technique precisely determines pulse characteristics like repetition rate and photon number, crucial for optical sensing applications.

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Last Updated: May 2, 2026

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Area of Science:

Photonics and Optical Measurement
Quantum Optics
Signal Processing

Background:

Accurate characterization of weak light pulses is essential for advanced optical systems.
Detecting non-synchronized, repetitive pulsed light presents significant challenges in signal analysis.
Existing methods may lack the precision required for low photon number measurements.

Purpose of the Study:

To develop and validate a robust method for measuring weak light pulses, particularly non-synchronized repetitive ones.
To enable accurate reconstruction of pulse parameters such as repetition rate, phase, photon number, and pulse width.
To achieve high precision in these measurements using a single-photon detector.

Main Methods:

Utilizing interval distribution counting with a single-photon detector.
Developing algorithms for reconstructing repetition rate and phase from detected intervals.
Applying the method to analyze weak, non-synchronized repetitive pulsed light signals.

Main Results:

The method accurately reconstructs the repetition rate and phase of weak pulses.
Achieved an error below ±0.01% in repetition rate reconstruction.
Demonstrated an error below ±0.8% in measuring the average photon number per pulse.

Conclusions:

The proposed interval distribution counting method offers a precise and reliable way to measure weak light pulses.
This technique is particularly effective for non-synchronized repetitive pulsed light.
The high accuracy achieved opens possibilities for improved optical sensing and characterization.