Tunable Multi-Wavelength Laser Transmitter Modules for WDM
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Solution Overview
Problem
Current optical WDM transceivers face challenges in efficiently managing multiple WDM channels over a single fiber, requiring high integration and flexibility while maintaining low power consumption and cost-effectiveness, especially in achieving high data throughput rates like 100 Gb/s.
Innovation Solution
The development of tunable multi-wavelength laser transmitter modules with a common tunable laser transmitter module design, featuring a substrate with semiconductor structures forming tunable lasers, optical modulators, and a beam combiner that synchronously tunes lasers across different WDM wavelengths, allowing for flexible operation across various spectral bands and sub-bands, thereby enabling efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separate WDM transceivers are used to achieve high data throughput rates, then the data transmission capacity is improved, but the system complexity and cost increase
Solution Approach 1:
The patent combines multiple WDM transceiver functions into a single integrated device that can simultaneously handle multiple WDM channels. The integrated transceiver includes multiple laser sources operating at different WDM wavelengths, optical modulators, and detection circuits all within one package, thereby achieving high data throughput rates while reducing system complexity and cost compared to using multiple separate transceivers.
Solution Approach 2:
The integrated WDM transceiver is designed with multi-functionality to perform both transmission and reception of multiple WDM channels simultaneously. The device can operate across different WDM wavelength ranges and support various data rates, making it a universal solution that replaces multiple specialized transceivers while maintaining high productivity.
2Productivity
If the number of WDM channels is increased to achieve high data throughput rates, then the transmission capacity is improved, but the power consumption increases
Solution Approach 1:
The patent merges multiple WDM channel processing functions into a single integrated transceiver, allowing shared use of power-consuming components such as laser drivers, modulators, and signal processing circuits. This consolidation reduces overall power consumption compared to using separate transceivers for each WDM channel, while still achieving high data throughput rates through multiple channels.
3Adaptability or versatility
If multiple separate transceivers are deployed for different WDM sub-bands, then the transmission flexibility is improved, but the inventory management complexity increases
Solution Approach 1:
The integrated WDM transceiver is designed with universal functionality to operate across multiple WDM sub-bands and support various data rates. This multi-band capability allows a single transceiver model to replace multiple specialized transceivers, providing transmission flexibility while significantly simplifying inventory management and deployment.
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 provides a high level of integration and flexibility, enabling efficient data transmission at high throughput rates with reduced power consumption and cost, allowing the same transceiver to operate in different WDM sub-bands, thus simplifying inventory management and implementation.
Implementation Method 1
Each tunable laser includes a tunable sampled Bragg grating reflector responsive to an electrical control signal to tune a respective optical wavelength produced by the tunable laser
Implementation Method 2
a beam combiner that receives laser light from the optical modulators to produce a combined optical output
Data Source
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AI summary
Techniques, devices and systems for optical communications based on wavelength division multiplexing (WDM) that use tunable multi-wavelength laser transmitter modules (110).