LiDAR System Semiconductor Optical Amplifier Channel Count
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Solution Overview
Problem
Current LiDAR systems face limitations in increasing the sample rate without significantly impacting cost and complexity, particularly in coherent detection methods which require more complex transceivers and struggle to efficiently amplify optical signals.
Innovation Solution
The implementation of a semiconductor optical amplifier (SOA) with a bifurcated and tapered waveguide configuration that splits and amplifies the laser signal into multiple channels, increasing the channel count and output power while maintaining system simplicity and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of laser sources or channels is increased to enhance the sample rate, then the sensitivity and efficiency of coherent detection are improved, but the system complexity and cost increase
Solution Approach 1:
The patent applies segmentation by dividing a single laser source into multiple channels using an optical splitter. The master oscillator generates one laser signal that is then split into multiple paths, each with its own semiconductor optical amplifier. This allows multiple channels to be created from a single laser source, increasing the sample rate without proportionally increasing system complexity or cost.
Solution Approach 2:
The patent implements multi-functionality by using a single master oscillator to serve multiple channels simultaneously. The optical splitter distributes the laser signal to multiple semiconductor optical amplifiers, allowing one laser source to fulfill the role of multiple independent sources. This universal approach enables the system to achieve high sample rates without requiring multiple separate laser systems.
2Power
If multiple laser sources are used to increase channel count, then the output power and sensitivity are improved, but the cost and manufacturing complexity increase
Solution Approach 1:
The patent segments the optical signal path after a single laser source, using an optical splitter to divide the signal into multiple paths. Each path has its own semiconductor optical amplifier that can be independently controlled and optimized. This segmentation allows the system to achieve high output power across multiple channels while maintaining simpler manufacturing compared to integrating multiple laser sources.
Solution Approach 2:
The patent introduces an optical splitter as an intermediary component between the single laser source and the multiple semiconductor optical amplifiers. This intermediary device enables the distribution of the laser signal to multiple channels, allowing the system to achieve the benefits of multiple sources without the manufacturing complexity of integrating multiple laser diodes or sources directly.
3Measurement precision
If coherent detection methods are implemented to improve measurement precision, then the distance measurement accuracy is enhanced, but the transceiver complexity increases
Solution Approach 1:
The patent segments the detection function across multiple channels, with each channel having its own semiconductor optical amplifier and detection path. This segmentation allows coherent detection to be implemented in a distributed manner, where each channel processes its signal independently. The result is improved distance measurement accuracy through coherent detection while the complexity is distributed and managed through the modular channel structure.
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 configuration enhances the sample rate of LiDAR systems by increasing the number of laser sources or channels, improving the sensitivity and efficiency of coherent detection without increasing the system's complexity or cost, thereby enabling more effective distance measurement and data collection.
Implementation Method 1
an optical splitter configured to split the light signal into two or more split light signals
Implementation Method 2
two or more respective semiconductor optical amplifiers (SOAs), each SOA configured to receive one of the split light signals and amplify the split light signal
Data Source
AI summary
Implementations described and claimed herein include a LiDAR system with a semiconductor optical amplifier (SOA) configured to receive a light signal from a master-oscillator laser source, the semiconductor optical source including an optical splitter configured to split the light signal into two or more split light signals and two or more respective semiconductor optical amplifiers (SOAs), each SOA configured to receive one of the split light signals and amplify the split light signal.