Wavelength Adapter Two-Stage Conversion Phase Preservation
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Solution Overview
Problem
The optical GW blocks signal lights with wavelength shifts, causing traffic disruptions as it is designed to block unnecessary signals, leading to ineffective transmission of wavelength-shifted signals.
Innovation Solution
A wavelength adapter and method that utilize two-stage wavelength conversion using pump lights and filters to convert signal lights into wavelengths within the target band while maintaining phase relationships, allowing for the transmission of modified signal lights without blocking them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the optical GW blocks signal lights with wavelength shifts to prevent interference with other traffic, then traffic interference is reduced, but legitimate wavelength-shifted signal lights are also blocked causing traffic disruption
Solution Approach 1:
The patent introduces a wavelength adapter as an intermediary device between the signal light source and the optical gateway. This adapter performs wavelength conversion on legitimate signal lights before they reach the gateway, transforming them into wavelengths that will not be blocked by the gateway's filtering mechanism, thus allowing them to pass through while the gateway continues to block interference.
Solution Approach 2:
The patent changes the wavelength parameter of the signal light using optical frequency conversion. By converting the signal light to a different wavelength (specifically, a wavelength that is not blocked by the optical gateway), the system maintains the signal's legitimacy while avoiding the blocking mechanism of the gateway, thus resolving the contradiction between preventing interference and ensuring transmission.
2Object-affected harmful factors
If the optical GW is configured to block all wavelength-shifted signals to prevent any interference, then interference prevention is maximized, but the ability to transmit necessary wavelength-shifted signals is lost
Solution Approach 1:
The patent segments the wavelength space into blocked wavelengths (which the gateway filters) and unblocked wavelengths (which the gateway allows). The wavelength adapter uses this segmentation by converting signal lights to wavelengths in the unblocked region, enabling the system to differentiate between harmful signals (blocked by gateway) and legitimate signals (converted to unblocked wavelengths).
Solution Approach 2:
The wavelength adapter acts as a mediator that translates legitimate signal lights from one wavelength domain (blocked by gateway) to another wavelength domain (unblocked by gateway), thereby maintaining transmission flexibility while the gateway maintains its interference-blocking function.
3Reliability
If wavelength conversion is performed to modify signal light wavelengths, then the signals can pass through the optical gateway, but the phase relationship of the signal light may be affected
Solution Approach 1:
The patent uses optical frequency conversion mechanisms (such as four-wave mixing in optical fibers or electro-optic modulation) that preserve the phase relationship of the input signal light. These optical mechanisms convert wavelengths while maintaining the phase coherence of the signal, unlike electronic processing that would introduce phase distortion.
Solution Approach 2:
The patent employs optical phase transition phenomena in the wavelength conversion process, such as phase-matched four-wave mixing, where the phase relationship of the pump and signal lights is carefully controlled to ensure that the generated idler light (output signal) maintains the phase information of the input signal light.
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
Enables the modification of wavelength shifts in signal lights, ensuring they do not interfere with other traffic and are conducted effectively, maintaining phase information throughout the conversion process.
Implementation Method 1
a first conversion unit that converts, by a first pump light, a first signal light into a second signal light having a wavelength not included in a target wavelength band while maintaining a phase relationship of the first signal light
Implementation Method 2
a first filter that blocks the first signal light and the first pump light, and allows for transmission of the second signal light
Implementation Method 3
a second conversion unit that converts, by a second pump light, the second signal light after transmission through the first filter into a third signal light having a wavelength in the target wavelength band while maintaining a phase relationship of the second signal light
Implementation Method 4
a second filter that blocks the second signal light and the second pump light, and allows for transmission of the third signal light
Data Source
AI summary
The wavelength adapter includes a first conversion unit, a first filter, a second conversion unit, and a second filter. The first conversion unit converts, by a first pump light, a first signal light into a second signal light having a wavelength not included in a target wavelength band while maintaining a phase relationship of the first signal light. The first filter blocks the first signal light and the first pump light, and allows for transmission of the second signal light. The second conversion unit converts, by a second pump light, the second signal light after transmission through the first filter into a third signal light having a wavelength in the target wavelength band while maintaining a phase relationship of the second signal light. The second filter blocks the second signal light and the second pump light, and allows for transmission of the third signal light.