Photonic Crystal Resonant Cavity Data Encoding
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Solution Overview
Problem
Current photonic systems lack efficient methods to encode and regulate data transmission in electromagnetic waves, particularly in photonic integrated circuits, where active components like modulators and switches are needed to enhance data encoding and transmission.
Innovation Solution
A photonic system comprising a waveguide with a photonic crystal and a resonant cavity that uses evanescent coupling to selectively transmit and extract electromagnetic waves, allowing for data encoding and filtering, and can be configured to operate as a modulator by varying the dielectric constant of the resonant cavity to encode information in carrier waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive photonic components (waveguides and attenuators) are used to transmit electromagnetic waves, then signal degradation is reduced and bandwidth is increased, but active components (modulators and switches) are still needed to encode data and regulate transmission
Solution Approach 1:
The patent combines the functions of waveguides, attenuators, modulators, and switches into a single photonic crystal structure with a resonant cavity. The photonic crystal provides passive waveguide functionality while the resonant cavity enables active modulation and switching by varying the dielectric constant, thus merging multiple components into one integrated unit that reduces overall device complexity while maintaining low signal degradation and high bandwidth
Solution Approach 2:
The photonic crystal with resonant cavity serves multiple functions simultaneously: it acts as a waveguide for electromagnetic wave transmission, an attenuator for signal control, a modulator for data encoding by varying dielectric constant, and a switch for regulating transmission. This multi-functionality eliminates the need for separate active and passive components, resolving the contradiction between signal quality and device complexity
2Productivity
If data is encoded in electromagnetic waves and transmitted via photonic devices, then data transmission rate is increased and electromagnetic interference is eliminated, but signal degradation and loss occur during transmission
Solution Approach 1:
The resonant cavity in the photonic crystal provides a feedback mechanism where electromagnetic waves interacting with the varying dielectric constant experience controlled phase shifts and amplitude changes. This feedback enables efficient data encoding while the photonic crystal structure maintains low loss transmission by confining waves within its periodic structure, thus resolving the contradiction between high transmission rate and signal degradation
3Adaptability or versatility
If a photonic crystal with resonant cavity is used to selectively couple electromagnetic waves, then data encoding and filtering capability is improved, but device structure becomes more complex
Solution Approach 1:
The patent achieves data encoding and filtering by dynamically varying the dielectric constant of the resonant cavity rather than using complex structural modifications. This parameter-based control allows the same photonic crystal structure to perform multiple encoding functions by adjusting material properties, thereby improving adaptability without proportionally increasing structural complexity
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
Enables efficient data encoding and transmission with improved bandwidth and reduced signal degradation, allowing for high-data-rate communication while eliminating electromagnetic interference.
Implementation Method 1
a photonic crystal with a resonant cavity that is configured to selectively and evanescently couple one or more of the electromagnetic waves from the first waveguide into the resonant cavity
Implementation Method 2
a second waveguide positioned to transmit and extract one or more electromagnetic waves from the resonant cavity via evanescent coupling
Implementation Method 3
a photonic crystal with a resonant cavity
Data Source
AI summary
Various embodiments of the present invention are related to photonic systems and methods that can be used to encode data in carrier electromagnetic waves. In one embodiment of the present invention, a method for encoding data in carrier electromagnetic waves is provided. The method comprises: transmitting a number of carrier electromagnetic waves in a first waveguide; coupling one or more of the carrier electromagnetic waves into a resonant cavity of a photonic crystal coupled to the first waveguide; modulating the one or more carrier electromagnetic waves within the resonant cavity in order to generate data encoded electromagnetic waves; and coupling the data encoded electromagnetic waves into a second waveguide.