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Related Experiment Video

Updated: Sep 7, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Chaotic microlasers caused by internal mode interaction for random number generation.

Chun-Guang Ma1,2, Jin-Long Xiao1,2, Zhi-Xiong Xiao1,2

  • 1State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.

Light, Science & Applications
|June 21, 2022
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Summary
This summary is machine-generated.

This study introduces a novel self-chaotic microlaser for generating unpredictable random numbers. This new method avoids external feedback limitations, enabling robust optical chaos for high-speed random number generation.

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Area of Science:

  • Photonics and Nonlinear Dynamics
  • Semiconductor Laser Physics
  • Random Number Generation

Background:

  • Chaotic semiconductor lasers with external feedback are explored for random number generation.
  • External feedback introduces limitations due to loop time, causing correlation peaks in chaotic output.

Purpose of the Study:

  • To demonstrate the first self-chaotic microlaser utilizing internal mode interaction.
  • To achieve random number generation from this self-chaotic microlaser output.

Main Methods:

  • Utilized a dual-mode microcavity laser design.
  • Adjusted mode frequency interval near the intrinsic relaxation oscillation frequency.
  • Performed numerical and experimental predictions and realizations of nonlinear dynamics.

Main Results:

  • Successfully predicted and realized self-chaos and period-oscillations through internal mode interaction.
  • Demonstrated internal mode interaction and corresponding carrier spatial oscillations.
  • Achieved controllable and robust optical chaos in a solitary laser.

Conclusions:

  • Internal mode interaction offers a novel approach for nonlinear dynamics in solitary lasers.
  • This self-chaotic microlaser provides a new, simple method for high-speed random number generation.
  • The findings pave the way for mode engineering in nonlinear laser dynamics.