High-Density DWDM Fiber Optic Assembly with Integrated AWG Filters
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Solution Overview
Problem
The deployment of dense wavelength division multiplexing (DWDM) in fiber optic networks faces challenges related to space density, channelization efficiency, and cross-connection methodology due to the increased number of channels requiring more optical filters, which in turn increases the space consumption in fiber optic assemblies.
Innovation Solution
The implementation of high-density DWDM (HD-DWDM) solutions using very small form factor fiber optic connection components, such as MDC connectors, and optical filters like thin film filters and arrayed waveguide filters, within a chassis that supports a high fiber optic connection density, allowing for up to 558 connections per U space, and enabling efficient expansion from 24 to 48 DWDM channels while maintaining signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of DWDM channels is increased, then the bandwidth and capacity are improved, but the number of optical filters required increases, leading to increased space consumption in fiber optic assemblies
Solution Approach 1:
The patent combines multiple optical filter functions into a single integrated arrayed waveguide filter (AWG) component. Instead of using separate filters for each wavelength channel, the AWG provides multiplexing and demultiplexing functions for multiple DWDM channels simultaneously, dramatically reducing the number of discrete filter components and the space they occupy in the fiber optic assembly.
Solution Approach 2:
The arrayed waveguide filter serves multiple functions within a single component: it acts as both a multiplexer and demultiplexer for multiple wavelength channels, replacing what would traditionally require separate filter assemblies for each function. This multi-functionality reduces overall device complexity and space requirements while supporting increased channel capacity.
2Reliability
If traditional fiber optic connectors are used, then connection reliability is maintained, but the connection density per unit space is limited
Solution Approach 1:
The patent employs nested connector designs where multiple fiber connections are integrated within a single connector housing. The MPO (Multi-Fiber Push-On) connector allows multiple fiber strands to be connected simultaneously through a single interface, effectively nesting multiple connection functions within one physical component, thereby increasing connection density without compromising reliability.
Solution Approach 2:
The invention transitions from traditional single-fiber connectors to multi-fiber connectors that utilize spatial arrangement in multiple dimensions. By organizing multiple fiber connections in a compact array format within a single connector body, the system achieves higher connection density per unit space while maintaining the same connection interface footprint.
3Productivity
If more optical filters are added to support additional channels, then channelization efficiency is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent merges multiple individual optical filter functions into a single arrayed waveguide filter component. The AWG integrates the spectral filtering functions for multiple wavelength channels into one monolithic device, eliminating the need for separate filter assemblies and reducing overall device complexity while maintaining high channelization efficiency.
Solution Approach 2:
The invention replaces traditional mechanical filter assemblies with an integrated photonic circuit-based arrayed waveguide filter. This substitution eliminates the need for mechanical adjustment and alignment of multiple discrete filters, reducing device complexity and improving reliability while maintaining precise wavelength channelization.
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 approach significantly increases the fiber optic connection density and bandwidth in a compact space, allowing for efficient scaling of deep fiber networks with reduced signal attenuation and space requirements, while maintaining multiplexing and demultiplexing order.
Implementation Method 1
Wavelength division multiplexing (WDM) multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths of light
Implementation Method 2
WDM modules may utilize a plurality of optical filters, e.g. bandpass filters and channel filters, to isolate wavelengths for each channel
Implementation Method 3
Some representative optical filters may include thin film filters (TTFs) and arrayed wave guide (ARG) filters
Data Source
AI summary
A fiber optic assembly is provided including a body defining a fiber routing volume, a plurality of fiber optic components disposed in a front side of the body, and a plurality of optical filters disposed within the volume. The plurality of optical filters enable at least twenty four (24) dense wavelength division multiplexing (DWDM) channels.