Optical Transmitter Driver Current Reduction via Data Encoding
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Solution Overview
Problem
The reliability and lifetime of optical transmitters and receivers in optical communication systems are reduced due to high average electrical driver currents, which also increase operating temperatures and decrease data transmission efficiency.
Innovation Solution
Applying data encoding techniques that reduce the average electrical driver current, such as by inverting data bits or producing encoded data with fewer active bits, to lower the aggregate electrical driver current and thereby extend the lifespan and improve the reliability of optical transmitters and receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high average electrical driver current is used to drive the optical transmitter, then data transmission rate is improved, but reliability and lifetime of the optical transmitter and receiver are reduced
Solution Approach 1:
The patent applies data encoding techniques that transform the electrical signal parameters to reduce the average current while preserving data transmission integrity. By inverting data bits or producing encoded data with fewer active bits, the electrical driver current waveform is modified to have lower average amplitude, thereby extending component lifetime while maintaining effective data communication at the required rate
2Productivity
If high average electrical driver current is used to drive the optical transmitter, then data transmission rate is improved, but operating temperature increases and data transmission efficiency decreases
Solution Approach 1:
The encoding technique modifies the electrical signal parameters to reduce average power dissipation. By transforming the data representation to have fewer active bits or inverted polarity, the RMS and average current are reduced, which directly lowers I²R heating in the electrical driver and optical transmitter, thereby reducing operating temperature while preserving data transmission capability
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 enhances the reliability and lifetime of optical transmitters and receivers by reducing their operating temperatures and maintaining data transmission rates while minimizing power consumption.
Implementation Method 1
An optical transmitter such as a VCSEL can be controlled by an electrical signal driver, which produces an electrical current (referred to as an 'electrical driver current') that is provided to the optical transmitter. Provision of the electrical driver current to the optical transmitter stimulates the optical transmitter to cause the optical transmitter to emit light.
Data Source
AI summary
Data for transmission by an optical transmitter that is driven by a signal driver is encoded, where the encoding is according to a criterion that specifies a reduction of an aggregate electrical current of the signal driver.