Optical Switching Apparatus Reducing Insertion Losses
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Solution Overview
Problem
Current optical switching apparatuses, particularly in reconfigurable optical add/drop multiplexers, face challenges in increasing filtering bandwidth and reducing insertion losses due to the addition of optical components like arrayed waveguide gratings for spatial optical coupling.
Innovation Solution
The proposed optical switching apparatus includes input ports, a dispersion component, filters, and a redirection component that decompose and redirect beams into different sub-beams based on their bands, separating and overlapping their transmission directions to enhance filtering bandwidth while minimizing the number of optical components, thereby reducing insertion losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If arrayed waveguide gratings (AWGs) are added for spatial optical coupling, then filtering bandwidth is improved, but insertion losses increase
Solution Approach 1:
The patent extracts and removes the AWG component from the optical switching system. Instead of using AWGs for spatial optical coupling, the invention employs a different architectural approach that eliminates this component entirely, thereby removing the source of insertion losses while maintaining the required filtering bandwidth through alternative beam separation and redirection mechanisms
Solution Approach 2:
The patent segments the optical beam processing into distinct functional stages: dispersion component for wavelength separation, filter for band selection, and redirection component for spatial routing. This segmentation allows each component to perform its specific function efficiently without the need for AWGs, reducing overall insertion losses while achieving the required filtering bandwidth
2Area of stationary object
If multiple optical components are added to increase filtering bandwidth, then bandwidth is improved, but device complexity increases
Solution Approach 1:
The patent combines the functions of dispersion, filtering, and redirection into an integrated optical switching apparatus where these functions work in sequence within a unified structure. This merging approach achieves wide filtering bandwidth coverage while avoiding the need for separate, complex AWG-based spatial coupling systems, thereby reducing overall device complexity
Solution Approach 2:
The patent utilizes spatial dimensionality through the redirection component to route different wavelength bands to different output ports. By employing spatial redirection rather than adding more complex optical components, the system achieves multi-band filtering capability while maintaining relatively simple device architecture
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 configuration effectively improves filtering bandwidth and reduces insertion losses by optimizing beam separation and overlap, enhancing the performance of optical switching apparatuses in reconfigurable optical add/drop multiplexers.
Implementation Method 1
the dispersion component is configured to decompose the first beam into a plurality of first sub-beams, the dispersion component is further configured to decompose the second beam into a plurality of second sub-beams
Implementation Method 2
The first filter is configured to separate transmission directions of the plurality of first sub-beams and the plurality of second sub-beams into different transmission directions in a first direction based on the different bands
Data Source
AI summary
An optical switching apparatus includes an input port, a dispersion component, a first filter, a redirection component, and output ports. The input port enables a first and a second beam to be incident onto the dispersion component, which decomposes the first and the second beams respectively into a plurality of first and second sub-beams, where the plurality of first sub-beams and second sub-beams belong to different bands. The first filter separates transmission directions of the plurality of first and second sub-beams into different transmission directions in a first direction (X) based on the different bands, enables the plurality of first and second sub-beams respectively to be incident onto a first area and a second area of the redirection component, where the first and second areas are separated in the first direction.