Resonant Mirror Assembly for Tunable PLC Transmissivity
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Solution Overview
Problem
Existing planar lightwave circuits (PLCs) lack effective control over transmissivity/reflectivity, which is critical in various applications such as communications and biomedical instrumentation.
Innovation Solution
A resonant mirror assembly with cascaded optical resonators, each with unique coupling coefficients, is used to control the transmissivity/reflectivity of a planar lightwave circuit over a range of 0% to 100%, achieved through fabrication and operational adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional PLC structures are used, then the device structure is simple, but the transmissivity/reflectivity control capability is insufficient
Solution Approach 1:
The resonant mirror assembly is divided into multiple cascaded optical resonators (first optical resonator, second optical resonator, etc.), each with independent coupling coefficients. This segmentation allows independent control of transmissivity and reflectivity for each resonator, providing fine-grained control capability while maintaining a modular structure that can be systematically integrated into the PLC.
Solution Approach 2:
Each optical resonator is designed with specific local coupling coefficients that differ from one another (K1≠K2, K3≠K4, etc.). This local quality differentiation enables each resonator to exhibit distinct transmissivity and reflectivity characteristics, allowing precise control of light propagation properties at different stages of the optical path without requiring complete redesign of the entire system.
2Manufacturing precision
If multiple cascaded resonators with different coupling coefficients are implemented, then precise transmissivity/reflectivity control is achieved, but the manufacturing complexity increases
Solution Approach 1:
The coupling coefficients of the optical resonators are designed with specific parameter relationships (K1≠K2, K3≠K4, etc.), where each resonator has distinct coupling parameters. This parameter differentiation enables precise control of transmissivity and reflectivity by adjusting the coupling strength between waveguides and resonators, achieving fine-grained optical control while the parameters can be optimized during fabrication to balance precision and manufacturability.
3Adaptability or versatility
If resonant mirror assembly with cascaded resonators is used, then optical control capability is enhanced, but the device complexity increases
Solution Approach 1:
The resonant mirror assembly is segmented into multiple independent optical resonators coupled in cascade configuration. Each resonator can be independently designed and optimized with specific coupling coefficients, enabling flexible control of optical properties. The modular segmented structure allows systematic integration while maintaining design flexibility and control capability.
Solution Approach 2:
The coupling coefficients between waveguides and optical resonators are designed to be tunable or adjustable, allowing dynamic control of transmissivity and reflectivity. This dynamic capability enables the system to adapt to different operational requirements by changing the coupling strength, providing real-time optical control without requiring physical reconfiguration of the entire resonant mirror assembly.
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 enables precise control of light transmission and reflection in PLCs, allowing for tunable reflectivity and transmissivity, enhancing their performance in applications like wavelength tuning and optical power management.
Implementation Method 1
a resonant mirror assembly having a number of cascaded resonators that provide or otherwise facilitate the control of the transmissivity / reflectivity of a planar lightwave circuit
Implementation Method 2
each optical resonator exhibiting a pair of coupling coefficients
Data Source
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AI summary
Aspects of the present disclosure describe planar lightwave circuit systems, methods and structures including a resonant mirror assembly having cascaded resonators that provide or otherwise facilitate the control of the transmissivity / reflectivity of a planar lightwave circuit (PLC) - or portion thereof - over a range of 0% to substantially 100%.