Photonic Integrated Circuit for High-Brightness Squeezed Light
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Solution Overview
Problem
Conventional methods for generating squeezed light are not suitable for chip-scale devices and typically produce low-power squeezed light near vacuum, limiting their application in devices requiring higher brightness and compatibility with nonlinear optical materials.
Innovation Solution
A photonic integrated circuit (PIC) system utilizing optomechanical resonators that couple mechanical and optical resonances to generate high-brightness squeezed light, with a photonic summing device coherently adding squeezed light from multiple sources to increase brightness while preserving the degree of squeezing, suitable for chip-scale manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional parametric oscillators are used to generate squeezed light, then the degree of squeezing is achieved, but the power and brightness remain low
Solution Approach 1:
The patent combines multiple independent squeezed light sources through a photonic summing device to generate high-brightness squeezed light. Multiple optomechanical resonators are pumped simultaneously to produce squeezed light that is then coherently combined, achieving power and brightness levels unattainable by single sources while preserving the squeezing property
Solution Approach 2:
The patent introduces a photonic summing device as an intermediary component that coherently combines light from multiple squeezed light sources. This mediator enables the constructive interference of multiple low-power squeezed light beams to produce high-brightness squeezed light while maintaining the quantum correlations
2Ease of manufacture
If conventional nonlinear optical materials are used, then squeezed light can be generated, but chip-scale integration is not feasible
Solution Approach 1:
The patent replaces conventional nonlinear optical materials with optomechanical resonators that utilize radiation pressure and mechanical oscillations to generate squeezing. This substitution enables integration with standard semiconductor fabrication processes using materials like silicon, gallium arsenide, and silicon nitride, making chip-scale manufacturing feasible
Solution Approach 2:
The patent changes the fundamental mechanism from material-based nonlinear optics to optomechanical coupling, allowing the use of standard chip-compatible materials. By tuning the mechanical resonance frequency and optical pump frequencies, the system achieves squeezing without requiring specialized nonlinear optical materials that are difficult to integrate
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
The system effectively increases the brightness of squeezed light while maintaining its degree of squeezing, making it suitable for applications in quantum computing and quantum metrology, and is compatible with chip-scale manufacturing using materials like silicon and gallium arsenide.
Implementation Method 1
optomechanical resonators that are configured to exhibit both optical and mechanical resonance in response to input of an optical driver signal. An optomechanical resonators can be configured such that the mechanical and optical resonances are coupled.
Implementation Method 2
Mechanical oscillation of an optomechanical resonator changes a resonant frequency of the electric field within the optomechanical resonator
Implementation Method 3
a photonic summing device that is configured to coherently add light received from multiple sources. The photonic summing device receives first squeezed light from the first light squeezing device and second squeezed light from the second light squeezing device.
Implementation Method 4
The photonic summing device is configured to output third squeezed light that has a power, or brightness, that is approximately equal to the sum of the powers of the first squeezed light and the second squeezed light
Data Source
AI summary
A high-brightness squeezed light source includes a plurality of light squeezing elements and a photonic summing device. The light squeezing elements each output respective squeezed light responsive to receipt of unsqueezed light. The photonic summing device receives the squeezed light output by each of the light squeezing elements and coherently adds the squeezed light to generate a high-brightness squeezed light output. The high-brightness squeezed light output has a greater brightness than the outputs of the light squeezing elements, and a same degree of squeezing as one or more of the outputs of the light squeezing elements.