Dynamic Dispersion Compensation Within Pluggable Optical Transceivers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Chromatic dispersion in optical communication networks causes inter-symbol interference and signal-to-noise ratio penalties, particularly in pluggable optical transceivers, due to the high cost and complexity of existing dispersion compensation methods, which are not suitable for dynamic or adaptive networks.
Innovation Solution
A method and system for controlling dispersion compensation within pluggable optical transceivers using electrical and optical dispersion compensation modules, with parameter sets adjusted by a host network computing device to adapt to changing optical paths, enabling automatic reconfiguration and minimal operator intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external media with negative chromatic dispersion characteristics is used to compensate for chromatic dispersion, then chromatic dispersion compensation is achieved, but the cost increases and the configuration becomes unwieldy
Solution Approach 1:
The patent combines the dispersion compensation functionality directly into the pluggable optical transceiver module by integrating a dispersion compensation module (DCM) within the transceiver. This merging eliminates the need for separate external dispersion compensation media and simplifies the overall system configuration, allowing network operators to manage dispersion compensation through standard transceiver plug-and-play operations rather than complex external media configuration
Solution Approach 2:
The pluggable optical transceiver module is designed to perform multiple functions including signal transmission, reception, and dispersion compensation within a single integrated device. The transceiver can adapt to different optical path conditions by switching between pre-configured parameter sets, providing universal dispersion compensation capability across various network scenarios without requiring different external media for each condition
2Reliability
If coherent modulation systems with built-in signal processing are used to address chromatic dispersion, then chromatic dispersion compensation is achieved, but the development, implementation, and operational complexity significantly increases
Solution Approach 1:
The patent segments the dispersion compensation function from the complex coherent modulation system and implements it as a separate, simpler dispersion compensation module integrated into the transceiver. This segmentation allows the system to achieve dispersion compensation without adopting the full complexity of coherent modulation systems, maintaining simpler intensity-modulated direct-detection operation while adding targeted dispersion compensation capability
Solution Approach 2:
The patent introduces an intermediary dispersion compensation module that sits between the transmitter and receiver components within the transceiver. This intermediary module provides the necessary dispersion compensation function without requiring the entire system to adopt complex coherent modulation architecture, thereby achieving compensation while limiting the increase in overall system complexity
3Reliability
If coherent modulation systems are used to address chromatic dispersion, then chromatic dispersion compensation is achieved, but operational power consumption increases
Solution Approach 1:
The patent employs a simpler, lower-power dispersion compensation module rather than power-intensive coherent modulation systems. The DCM uses more energy-efficient electrical or optical compensation techniques that consume less operational power while achieving the necessary dispersion compensation, avoiding the high power requirements of coherent detection and processing
4Reliability
If external media are used for dispersion compensation, then chromatic dispersion can be compensated, but the solution is not satisfactory for dynamic or adaptive networks where optical path conditions may change
Solution Approach 1:
The patent implements a dynamic dispersion compensation solution where the transceiver can switch between multiple pre-configured parameter sets corresponding to different optical path conditions. This dynamic capability allows the system to adapt to changing network conditions, fiber types, and path characteristics without requiring manual reconfiguration or external media changes, making it suitable for dynamic and adaptive network operations
Data Source
AI summary
Chromatic dispersion compensation is performed in one or more pluggable optical transceiver (POT) devices operating within an intensity-modulated direct-detection (IMDD) optical network. Compensation is performed within each POT using an electrical and/or optical chromatic dispersion module which are controlled by a set of parameters. A network computing device includes a computer processor and a host management interface for communicating with the POT. In the event of a link failure, the computer processor determines a second set of parameters to control the one or more dispersion compensation module(s) of the POT. The second set of parameters are different from a first set of parameters used to control the one or more compensation module(s) in the case of a first optical path. The computer processor causes the POT to use the second set of parameters in place of the first set of parameters.