Birefringent Structure True Random Number Generation

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Solution Overview

Problem

Conventional random number generators (RNGs) are limited by pseudo-random algorithms and require significant corrections for noise fluctuations, leading to slow speeds and inefficiencies, especially in producing truly random numbers independent of operating conditions.

Innovation Solution

The use of a highly coherent beam source interacting with a birefringent medium within an optical cavity, where the beam's polarization is rotated and subdivided, generating randomized energy that is then measured by a photodetector, producing inherently random and parallel bit streams.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional optical systems use optical noise for random number generation, then random numbers can be produced, but the system exhibits slow speeds and requires significant corrections for noise fluctuations

Engineering Contradiction:

Improverandom number generation speedVSAvoidnoise stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent changes the fundamental parameter being measured from noise intensity to polarization state distribution. By using a coherent light source and measuring the polarization state after interaction with the birefringent medium, the system eliminates temperature and external condition dependencies while maintaining high-speed operation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical/electronic noise-based system with an optical quantum system. Instead of using electronic or thermal noise that requires correction, the invention uses quantum-optical effects (polarization state changes) that inherently produce reliable random numbers without needing Von Neumann correctors or filtering.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If conventional RNGs use noise sources with significant fluctuations, then random numbers can be generated, but correction circuitry is required which increases device complexity

Engineering Contradiction:

Improverandom bit production rateVSAvoidcorrection circuitry

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent extracts only the essential quantum-optical effect (polarization state change) from the complex noise-based system. By removing the need for Von Neumann correctors and filtering circuitry, the invention achieves high-speed random bit production with minimal device complexity, using only a coherent light source, birefringent medium, and polarization analyzer.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If pseudo-random algorithms are used to generate random bits, then random numbers can be produced, but the randomness is not true randomness due to fundamental limitations in system design

Engineering Contradiction:

Improvetrue randomnessVSAvoidalgorithmic processing

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces algorithmic pseudo-random generation with direct quantum-optical measurement. The random polarization states produced by the coherent light source interacting with the birefringent medium provide true randomness without requiring any algorithmic processing or correction, eliminating the fundamental limitations of pseudo-random algorithms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enables the generation of true randomness without pseudo-random algorithms, supports parallel computing, and provides rapid bit production with enhanced noise characteristics, overcoming the limitations of conventional RNGs.

Implementation Method 1

a birefringent structure formed of a plurality of abutting layers, each subsequent layer having a birefringent axis that is miss-aligned with the previous incident layer

Methodology Applied

Scientific EffectBirefringence: Birefringence

Implementation Method 2

Devices may be used to rotate the state of polarization of the light, maintaining a 'mixed quantum state' (relative to the axes of a birefringent medium)

Methodology Applied

Scientific EffectPolarization rotation: Polarisation

Implementation Method 3

the device generates a randomized energy distribution that is then measured by a photodetector

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS10394525B2Generation of random numbers through the use of quantum-optical effects within a multi-layered birefringent structure

Publication Date: 2019.08.27 SCARLETT CAROL Y

AI summary

An optical system uses a multi-layered birefringent structure that receives an input beam that may be non-coherent or coherent, and produces a randomization energy from the input beam, by creating birefringent induced beam subdivisions as the beam passes through each birefringent layer, where after the beam has passed through a threshold number of birefringent layers, a randomized energy distribution is created. That randomized energy distribution is read by a photodetector and converted into a random number by a randomization processing device.