Fabry-Perot Resonator Frequency Conversion Under Weak EM Waves
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Solution Overview
Problem
Existing technologies for converting electromagnetic wave frequencies have limited conversion efficiency when the intensity of the incident electromagnetic wave is weak, necessitating a method that provides high conversion efficiency even under low-intensity conditions.
Innovation Solution
A device utilizing a time-varying Fabry-Perot resonator with a time-varying reflective surface and a partial reflective surface, where the reflectivity of the time-varying surface increases after an ultrafast laser pulse is applied, allowing for efficient frequency conversion of electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If nonlinear materials or elements are used for frequency conversion, then frequency adjustment capability is achieved, but conversion efficiency is insufficient when electromagnetic wave intensity is weak
Solution Approach 1:
The patent employs a time-varying reflective surface whose reflectivity dynamically changes over time, transitioning from a low reflectivity state during the incident pulse to a high reflectivity state during the echo pulse. This dynamic adjustment enables efficient frequency conversion by adapting the surface properties to the specific operational phase, thereby maintaining high conversion efficiency even when the incident electromagnetic wave intensity is weak.
Solution Approach 2:
The invention changes the reflectivity parameter of the surface over time. The reflectivity transitions from a first value (lower) when the electromagnetic wave pulse is incident to a second value (higher) when the echo pulse is generated. This parameter change allows the system to optimize frequency conversion efficiency at different stages of the wave interaction, ensuring reliable performance under weak intensity conditions.
2Productivity
If time-varying reflective surface is used to enhance conversion efficiency, then frequency conversion performance improves, but device complexity increases
Solution Approach 1:
The time-varying reflective surface is configured to automatically transition between low and high reflectivity states in response to the incident electromagnetic wave pulse, without requiring external control mechanisms. The surface serves itself by intrinsically adjusting its reflectivity property based on the wave interaction timeline, thereby achieving enhanced frequency conversion efficiency while avoiding the complexity of additional control systems.
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 device achieves high frequency conversion efficiency and allows for adjustable conversion frequencies by modifying the reflectivity and spacing between the time-varying and partial reflective surfaces, effectively addressing the limitations of existing technologies.
Implementation Method 1
a time-varying reflective surface onto an electromagnetic wave is incident and of which reflectivity changes as time elapses
Implementation Method 2
a device for converting an original frequency of an electromagnetic wave into a frequency corresponding to a resonator mode by using a time-varying Fabry-Perot resonator
Implementation Method 3
a partial reflective surface which is disposed to be spaced a predetermined distance from the time-varying reflective surface, from which an electromagnetic wave having a frequency corresponding to a resonator mode is emitted, and which has fixed reflectivity for partially reflecting the electromagnetic wave
Data Source
AI summary
The present invention relates to a device for converting a frequency of an electromagnetic wave and, more specifically, to a device for converting an original frequency of an electromagnetic wave into a frequency corresponding to a resonator mode by using a time-varying Fabry-Perot resonator including a time-varying reflective surface of which reflectivity changes with time. A device for converting a frequency of an electromagnetic wave according to an embodiment of the present invention comprises: a time-varying reflective surface on which an electromagnetic wave is incident and of which reflectivity changes with time; and a partially reflective surface which is disposed at a predetermined distance from the time-varying reflective surface, from which an electromagnetic wave having a frequency corresponding to a resonator mode is emitted, and which has a fixed reflectivity for partially reflecting the electromagnetic wave incident through the time-varying reflective surface, wherein the reflectivity of the time-varying reflective surface is smaller than the reflectivity of the partially reflective surface, and after the electromagnetic wave is trapped between the time-varying reflective surface and the partially reflective surface, the reflectivity of the time-varying reflective surface becomes greater than the reflectivity of the partial reflective surface.