TxPIC Chip Integrating Modulated Sources and Wavelength Selective Combiner
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Solution Overview
Problem
Conventional DWDM optical networks require numerous discrete optical components and precise alignment, leading to increased complexity and cost due to the need for dispersion compensation and amplification across different fiber types, which limits the data rate and channel density.
Innovation Solution
A photonic integrated circuit (PIC) chip with integrated modulated sources and a wavelength selective combiner eliminates the need for discrete optical components by integrating multiple modulated sources and a combiner on a single chip, enabling standardized wavelength grid operation and reduced optical alignment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If discrete optical components are used for DWDM optical networks, then wavelength division multiplexing can be achieved, but device complexity and alignment precision requirements increase
Solution Approach 1:
The patent integrates multiple discrete optical components (laser sources, modulators, filters, and combiners) onto a single photonic integrated circuit chip. This merging eliminates the need for separate alignment and coupling of individual components, thereby reducing device complexity while maintaining wavelength division multiplexing functionality.
Solution Approach 2:
The photonic integrated circuit chip performs multiple functions simultaneously: generating multiple wavelengths, modulating signals, filtering channels, and combining outputs. This multi-functionality consolidates what would traditionally require separate discrete components into a single universal device.
2Reliability
If discrete optical components with precise alignment are used, then optical signal transmission can be achieved, but manufacturing cost and alignment difficulty increase
Solution Approach 1:
By integrating all optical components on a single chip with fixed relative positions, the patent eliminates the need for precise manual alignment during assembly. The components are manufactured in their final positions relative to each other, dramatically easing manufacturing while maintaining transmission quality.
3Reliability
If dispersion compensation and amplification are implemented across different fiber types, then signal quality can be maintained, but data rate and channel density are limited
Solution Approach 1:
The patent employs tunable optical filters and wavelength-selective components that can dynamically adjust transmission parameters. This allows the system to adapt to different fiber types and dispersion conditions while maintaining signal quality, thereby enabling higher data rates and channel densities without being constrained by fiber-specific limitations.
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
The PIC chip enhances the efficiency and cost-effectiveness of DWDM optical networks by simplifying component integration, reducing alignment complexities, and enabling higher data rates and channel densities within the gain bandwidth of erbium-doped fiber amplifiers.
Implementation Method 1
a wavelength selective combiner having an input optically coupled to received all the channel signal outputs from the modulated sources
Data Source
AI summary
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated on the same chip.