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Related Experiment Video

Updated: May 15, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Fast random bits generation based on a single chaotic semiconductor ring laser.

Romain Modeste Nguimdo¹, Guy Verschaffelt, Jan Danckaert

¹Applied Physics Research Group, Vrije Universiteit Brussel, 1050 Brussels Belgium. Romain.Nguimdo@vub.ac.be

|December 25, 2012

Summary

This summary is machine-generated.

A single chaotic semiconductor ring laser generates fast random bit sequences using Exclusive-OR and bit extraction. This method achieves a 40 Gbit/s bit rate, passing statistical randomness tests.

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Area of Science:

Optics and Photonics
Information Security
Nonlinear Dynamics

Background:

Traditional random bit generation often requires two separate chaotic signal sources.
Semiconductor ring lasers offer a unique, single-device alternative due to their dual counterpropagating modes.

Purpose of the Study:

To investigate the feasibility of using a single chaotic semiconductor ring laser for high-speed random bit generation.
To analyze the system's performance and optimize parameters for enhanced randomness.

Main Methods:

Numerical and experimental investigation of a chaotic semiconductor ring laser.
Utilizing bitwise Exclusive-OR operation on sampled outputs from counterpropagating modes.
Employing least significant bits extraction after analog-to-digital conversion.

Main Results:

Achieved a fast random bit-stream generation at a bit rate of 40 Gbit/s.
The generated bit sequences successfully passed rigorous statistical randomness tests.
Demonstrated the dependence of randomness quality on system parameters and noise levels.

Conclusions:

A single chaotic semiconductor ring laser is a viable and efficient source for high-speed random bit generation.
The proposed postprocessing method (Exclusive-OR and LSB extraction) is effective for generating statistically random bit streams.
Further optimization can enhance the system's performance for secure communication applications.