2D WDM Optoelectronic Engine for Bandwidth Scaling
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Solution Overview
Problem
Current WDM systems face challenges in scaling bandwidth density in datacenters without increasing fiber count, limiting their ability to meet evolving bandwidth demands over generations.
Innovation Solution
The development of a 2D WDM optoelectronic engine comprising VCSEL and SI-PD arrays, zig-zag multiplexer and de-multiplexer components, and 2D fiber arrays, leveraging 2D wafer-scale fabrication to efficiently utilize embedded fiber infrastructure and enhance bandwidth capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional WDM systems use multiple fibers to increase capacity, then bandwidth capacity is improved, but device complexity and infrastructure cost increase
Solution Approach 1:
The patent transitions from one-dimensional linear WDM architectures to two-dimensional planar lightwave circuit (PLC) structures. Multiple wavelength channels are arranged in a planar configuration with input/output ports positioned at different locations on the same substrate, enabling spatial multiplexing without requiring additional fiber cables. This dimensional transformation allows N wavelength channels to be transmitted through a single fiber while maintaining compact form factor.
Solution Approach 2:
The PLC device integrates multiple functions into a single component: wavelength division multiplexing, wavelength division demultiplexing, and optical switching capabilities are all incorporated into one planar circuit. The same device can operate as a multiplexer, demultiplexer, or switch depending on configuration, eliminating the need for separate dedicated components for each function and reducing overall system complexity.
2Quantity of substance
If WDM systems increase fiber count to meet bandwidth demands, then bandwidth density is improved, but ease of operation and infrastructure management worsen
Solution Approach 1:
The patent employs two-dimensional planar lightwave circuits that consolidate multiple wavelength channels into a single integrated device with a compact footprint. This reduces the physical space required for optical infrastructure and simplifies cable management compared to traditional multi-fiber linear WDM systems, making the system easier to install, configure, and maintain while providing high bandwidth density.
3Adaptability or versatility
If traditional WDM architectures are used, then system simplicity is maintained, but adaptability to evolving bandwidth demands deteriorates
Solution Approach 1:
The PLC device incorporates reconfigurable optical switching capabilities that allow dynamic routing of different wavelength channels to different output ports. This enables the system to adapt to changing bandwidth demands and traffic patterns by reconfiguring the optical paths without requiring physical reconnection of fibers or replacement of hardware components, providing flexibility for future scalability.
Solution Approach 2:
The integrated PLC device provides multiple operational modes (multiplexing, demultiplexing, switching) within a single platform, allowing the system to evolve and adapt to different application requirements without requiring separate dedicated systems for each function, thereby enhancing long-term versatility.
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 allows for increased bandwidth density and graceful scaling of bandwidth demands without the need to increase fiber count, effectively addressing the limitations of existing WDM systems in datacenters.
Implementation Method 1
The semiconductor laser components emit different wavelength laser beams to provide for the WDM capabilities
Implementation Method 2
The MUX component includes three reflectors (e.g., relay mirrors) 140-1, 140-2 and 140-3 and three wavelength selective filters 135-1, 135-2 and 135-3
Implementation Method 3
The MUX component includes three reflectors (e.g., relay mirrors) 140-1, 140-2 and 140-3
Implementation Method 4
The output interfaces 145 may be an antireflection coated surface, collimator lenses, high contrast grating lens, prisms, or other form of coupling micro-optics
Data Source
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AI summary
An example device includes a first semiconductor component comprising at least two lasers to emit light at a first wavelength; a second semiconductor component comprising at least two lasers to emit light at a second wavelength, the first wavelength being different from the second wavelength; and an optical multiplexer to receive light from two lasers at the first wavelength and light from two lasers at the second wavelength. The optical multiplexer component includes a first output interface to couple light from one laser at the first wavelength and light from one laser at the second wavelength to a first optical fiber, and a second output interface to couple light from one laser at the first wavelength and light from one laser at the second wavelength beams to a second optical fiber.