Optical Transmission Quality Monitoring via Frequency Multiplexing
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Solution Overview
Problem
In optical transmission systems where multiple wavelengths are shared, providing a quality monitoring unit for each wavelength increases device costs and requires more installation space.
Innovation Solution
The system includes optical transmitting units that convert input signals into frequency modulation signals, multiplex monitoring signals with different frequencies, and convert these signals into optical signals with different wavelengths. A relay device with a photoelectric conversion unit and a measuring unit combines these optical signals and measures transmission quality without separate quality monitoring units for each wavelength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a quality monitoring unit is provided for each wavelength in the relay amplifier, then transmission quality for each wavelength can be monitored, but device cost increases and installation space is required to increase
Solution Approach 1:
The patent combines multiple quality monitoring functions into a single shared quality monitoring unit. The relay amplifier uses one quality monitoring unit to monitor transmission quality for multiple wavelengths by sequentially switching between different wavelength channels, rather than providing separate monitoring units for each wavelength. This merging approach maintains comprehensive quality monitoring capability while reducing device cost and installation space requirements.
Solution Approach 2:
The quality monitoring unit is designed with multi-functionality to perform quality monitoring for multiple wavelengths. By incorporating wavelength switching capability and universal measurement functions, a single monitoring unit can serve multiple wavelength channels, eliminating the need for dedicated monitoring units for each wavelength and thereby reducing overall system complexity and cost.
2Measurement precision
If a quality monitoring unit is provided for each wavelength in the relay amplifier, then transmission quality for each wavelength can be monitored, but installation space is required to increase
Solution Approach 1:
The patent combines multiple quality monitoring functions into a single shared quality monitoring unit. The relay amplifier uses one quality monitoring unit to monitor transmission quality for multiple wavelengths by sequentially switching between different wavelength channels, rather than providing separate monitoring units for each wavelength. This merging approach maintains comprehensive quality monitoring capability while reducing device cost and installation space requirements.
3Measurement precision
If separate quality monitoring units are provided for each wavelength, then accurate transmission quality measurement for each wavelength is achieved, but the number of components increases
Solution Approach 1:
The patent combines multiple quality monitoring functions into a single shared quality monitoring unit. The relay amplifier uses one quality monitoring unit to monitor transmission quality for multiple wavelengths by sequentially switching between different wavelength channels, rather than providing separate monitoring units for each wavelength. This merging approach maintains comprehensive quality monitoring capability while reducing device cost and installation space requirements.
Solution Approach 2:
The system employs dynamic wavelength switching within the single quality monitoring unit, allowing it to sequentially monitor different wavelength channels. This dynamic operation enables one component to perform multiple monitoring functions at different time points, reducing the total number of components needed while maintaining accurate measurement capability for each wavelength.
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 approach allows for the measurement of transmission quality for each wavelength without the need for individual quality monitoring units, reducing costs and space requirements for relay amplifiers.
Implementation Method 1
a frequency modulation conversion unit (a frequency modulation converter) that converts an input signal into a frequency modulation signal through frequency modulation conversion processing
Implementation Method 2
an optical modulation unit (an optical modulator) that converts the frequency modulation signal that is an electric signal in which the monitoring signals are multiplexed into optical signals having different wavelengths
Implementation Method 3
a photoelectric conversion unit (a photoelectric converter) that acquires a combined signal obtained by combining optical signals having different wavelengths from each other and converts the multiplexed signal into an electric signal
Data Source
AI summary
In an optical transmission system including a plurality of optical transmitting units and a relay device, the plurality of optical transmitting units include a frequency modulation conversion unit that converts an input signal into a frequency modulation signal through frequency modulation conversion processing, a multiplexing unit that multiplexes monitoring signals with different frequencies with the frequency modulation signal, and an optical modulation unit that converts the frequency modulation signal that is an electric signal in which the monitoring signals are multiplexed into optical signals having different wavelengths, and the relay device includes a photoelectric conversion unit that acquires a combined signal obtained by combining optical signals having different wavelengths from each other and converts the combined signal into an electric signal, and a measuring unit that measures transmission quality of the plurality of monitoring signals included in the electric signal.