Optical Receiving Apparatus Wavelength Distortion Compensation
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Solution Overview
Problem
In optical transmission systems using the FM batch conversion method, the varying distance from the video-optical line terminal to the video-optical network unit results in inconsistent optical signal power, leading to unpredictable quality of the frequency multiplexing signal.
Innovation Solution
An optical receiving apparatus that branches the input optical signal, amplifies the power of one branch, compensates for wavelength distortion, and dynamically adjusts amplification and compensation based on detected signal power to maintain consistent signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the transmission distance is extended, then the reach of the optical transmission system is improved, but the optical signal power is attenuated due to transmission path loss
Solution Approach 1:
The patent applies preliminary action by performing wavelength distortion compensation before the optical signal power becomes excessively attenuated. The compensation unit actively compensates for wavelength distortion in advance, allowing the system to extend transmission distance while maintaining signal quality before complete power loss occurs.
Solution Approach 2:
The patent implements feedback through the control unit that detects optical signal power and dynamically adjusts the compensation amount and amplification factor accordingly. This closed-loop feedback mechanism ensures optimal signal quality is maintained throughout extended transmission distances by continuously adapting to power variations.
2Length of stationary object
If the transmission distance is extended, then the reach of the optical transmission system is improved, but the quality of the frequency multiplexing signal becomes inconsistent
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the compensation amount and amplification factor based on detected optical signal power. The control unit modifies these parameters in real-time to maintain consistent signal quality across varying transmission distances, transforming a static system into one that adapts to changing conditions.
Solution Approach 2:
The feedback mechanism detects optical signal power and uses this information to control the compensation amount and amplification factor. This ensures that signal quality remains consistent across extended transmission distances by continuously adapting compensation parameters based on actual signal conditions.
3Loss of energy
If amplification is applied to compensate for power loss, then the optical signal power is improved, but wavelength distortion increases
Solution Approach 1:
The patent applies preliminary action by compensating for wavelength distortion before amplification causes excessive distortion to accumulate. The compensation unit actively counteracts wavelength distortion in advance, allowing subsequent amplification to occur without generating harmful distortion effects.
Solution Approach 2:
The patent converts the harmful effect of wavelength distortion into a beneficial controlled process by using the compensation unit to actively counteract and correct the distortion. The control unit manages the balance between amplification and distortion compensation, transforming what would be a harmful effect into a controlled parameter adjustment.
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 extends the transmission distance of optical signals by maintaining consistent power and quality of the frequency multiplexing signal, even over varying distances, thereby enhancing the reliability and reach of the optical transmission system.
Implementation Method 1
a reception amplification unit that amplifies power of the first optical signal
Implementation Method 2
a compensation unit that compensates for wavelength distortion of the first optical signal whose power has been amplified
Data Source
AI summary
An optical receiving apparatus includes: a first branching unit that branches an input optical signal into a first optical signal and a second optical signal; a reception amplification unit that amplifies power of the first optical signal; a compensation unit that compensates for wavelength distortion of the first optical signal whose power has been amplified; a first detection unit that detects power of the second optical signal; a first control unit that controls an amount of compensation for the wavelength distortion on the basis of the power of the second optical signal; a second branching unit that branches the first optical signal compensated for the wavelength distortion into a third optical signal and a fourth optical signal; a second detection unit that detects power of the third optical signal; and a second control unit that controls an amplification factor of the power of the first optical signal before the compensation for the wavelength distortion on the basis of the power of the third optical signal.