Optical Modulator for OAM Superposition State Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current technologies for large-capacity optical communication and classical computer computation have reached limits, struggling to efficiently and stably generate superposition states of quantum mechanics, particularly in realizing and maintaining minute quantized states for quantum computers, which are essential for advancing processing capabilities and data transmission speeds.
Innovation Solution
An optical modulator is designed to generate a coherent laser beam in a superposition state of two orthogonal angular momentum states using waveguides, phase shifters, and optical elements, enabling the creation of macro quantized states that can carry multiple quantum bits, thereby facilitating high-capacity optical communication and quantum computing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional optical modulators use intensity modulation or WDM to load information on light, then communication capacity increases, but the amount of information that can be loaded reaches a limit
Solution Approach 1:
The patent transitions from using classical light properties (intensity, wavelength, polarization) to utilizing quantum mechanical properties of light. Specifically, it employs the orbital angular momentum (OAM) degree of freedom of photons, which represents a new dimensional space for information encoding. By mapping quantum states onto different OAM modes, the system can encode multiple bits of information simultaneously in a single photon, thereby exponentially increasing communication capacity without exhausting traditional light degrees of freedom
Solution Approach 2:
The invention changes the fundamental parameter used for information encoding from classical optical parameters to quantum mechanical parameters. Instead of modulating intensity or wavelength, the system modulates the orbital angular momentum state of photons. This parameter change enables the use of quantum superposition states, where a single photon can exist in multiple OAM states simultaneously, allowing for high-dimensional quantum encoding and dramatically increasing the information capacity per photon
2Productivity
If classical computers continue to increase transistor integration following Moore's law, then processing speed should double every 3 years, but actual CPU speed has remained around 5 GHz for over 10 years
Solution Approach 1:
The patent proposes replacing the classical mechanical/electrical computing system with a quantum optical system. Instead of using electrons moving through transistors on silicon chips, the invention uses photons in quantum superposition states to perform computations. This substitution eliminates the fundamental limitations of classical computing, including the heating problem caused by irreversible processes and the Moore's law scaling limits, by leveraging quantum parallelism and reversible quantum logic operations
Solution Approach 2:
The invention utilizes the periodic nature of quantum oscillations and wave functions to perform computations. Quantum bits can be manipulated through periodic Hamiltonian evolution, where unitary transformations are applied in a periodic manner to achieve complex computational tasks. This periodic quantum action enables parallel processing of multiple computational paths simultaneously, overcoming the sequential processing limitations of classical CPUs
3Productivity
If quantum computers use minute quantized states for computation, then exponential high speed computation can be achieved, but it is very difficult to make and control quantum bits with high performance
Solution Approach 1:
The patent introduces optical modes, specifically orbital angular momentum modes, as intermediaries to realize quantum bits. Instead of directly manipulating elusive single-photon quantum states, the system uses well-controlled optical fields with defined OAM characteristics as carriers of quantum information. These optical intermediaries can be generated, manipulated, and detected using standard optical techniques, making quantum computation more feasible while maintaining the exponential speedup benefits of quantum parallelism
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 solution allows for the realization of a quantum computer with many integrated quantum bits and enables high-speed, low-power communication by stabilizing superposition states of orthogonal angular momentum, overcoming the limitations of existing technologies in data transmission and processing.
Implementation Method 1
generates a coherent laser beam in a superposition state of two orthogonal angular momentum states
Implementation Method 2
superposition state of two orthogonal angular momentum states
Data Source
AI summary
An optical modulator includes first and second waveguides; a first phase shifter provided in at least one of the first and second waveguides and configured to control a phase of the laser beam; a first optical element configured to combine the laser beam propagating through the first waveguide and the laser beam propagating through the second waveguide and separate the combined laser beam into two laser beams; a third (fourth) waveguide on which one (the other) of the laser beams separated by the first optical element is incident; a second phase shifter provided in at least one of the third and fourth waveguides and configured to control a phase of the laser beam; and a second optical element configured to combine the laser beam propagating through the third waveguide and the laser beam propagating through the fourth waveguide and emit the laser beam in the superposition state.