Silicon Photonics Optical Module for DWDM Data Transfer
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Solution Overview
Problem
Current communication systems are inadequate for handling the high bandwidth demands of modern internet and mobile applications, particularly in transferring multimedia files, due to limitations in electrical components and channel bandwidth, which restrict data transfer speeds and lead to inter-symbol interference.
Innovation Solution
The development of a silicon photonics-based optical module that converts electrical signals into optical signals for high-speed communication, utilizing multiple chip module technology and close integration of optical and electrical devices to achieve terabits per second speeds, with features like CWDM and DWDM grids, DFB lasers, and Si Mach Zehnder modulators to minimize noise and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If electrical components and channels are used for data transmission, then data transfer can be achieved, but bandwidth limitations and inter-symbol interference occur
Solution Approach 1:
The patent replaces electrical signal transmission with optical signal transmission using silicon photonics technology. Optical signals are used to transmit data through optical fibers, substituting the electrical components and channels that caused bandwidth limitations and inter-symbol interference. This substitution enables higher data transfer speeds while maintaining signal quality over longer distances.
Solution Approach 2:
The patent changes the fundamental parameter of signal transmission from electrical to optical domain. By using optical carriers instead of electrical signals, the system achieves higher bandwidth capacity and eliminates the inter-symbol interference that plagues electrical transmission systems at high speeds.
2Productivity
If optical devices are integrated with electrical devices, then terabits per second speeds are achieved, but device complexity increases
Solution Approach 1:
The patent merges optical devices and electrical devices into a single integrated module using silicon photonics technology. The optical components (lasers, modulators, detectors) are fabricated on the same silicon substrate as the electrical components, creating a tightly integrated optoelectronic module. This merging enables terabits per second data transfer rates while managing complexity through monolithic integration rather than separate discrete components.
Solution Approach 2:
The silicon photonics platform provides multi-functionality by integrating multiple optical functions (light generation, modulation, detection) and electrical functions (signal processing, control) onto a single chip. This universal platform can support various data rates and protocols, reducing overall system complexity despite the high performance capabilities.
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 enables high-speed data transfer of up to terabits per second, overcoming bandwidth limitations and inter-symbol interference, while reducing power consumption and spectral density, thus addressing the inadequacies of existing systems in supporting high-bandwidth applications.
Implementation Method 1
a silicon photonics-based optical module configured to convert electrical signal into optical signal for 100 Gb/s or 400 Gb/s high-rate communication
Implementation Method 2
a first laser with a first wave length having a peak of 1270 nm, a second laser having a second wave length having a peak at 1290 nm, a third laser with a third wave length having a peak at 1310 nm, and a fourth laser having a fourth wavelength having a peak at 1330 nm
Implementation Method 3
Si Mach Zehnder modulators to minimize noise and power consumption
Implementation Method 4
one or more high speed photodetectors made of germanium and integrated on a silicon substrate and coupled to an optical input port for detecting one or more incoming optical signals
Data Source
AI summary
An optical module for transmitting data from a data center via a dense wavelength division multiplex (DWDM) grid includes an optical modulator, a multiplexer, and a transmitter. The optical modulator modulates first and second optical signals pulse amplitude modulation for transmission over first and second wavelengths, respectively. The first wavelength is separated from the second wavelength according to a spacing of the DWDM grid for transmitting data at a selected baud rate. The multiplexer multiplexes the modulated first and second optical signals into a multiplexed optical signal, which includes the modulated first optical signal having the first wavelength and the modulated second optical signal having the second wavelength, and outputs the multiplexed optical signal. A transmitter transmits the multiplexed optical signal via the DWDM grid at the selected baud rate.