Compact Photonic LIDAR Layout for Low-Crosstalk Signal Processing
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Solution Overview
Problem
Current LIDAR systems are limited by the complexity and size of their optical sensing modules, which hinder their integration and efficiency in compact form factors, particularly in applications like autonomous vehicles and spatial awareness systems.
Innovation Solution
A compact optical sensing module with hybrid multi-chip integration, featuring a photonics chip coupled to a substrate with integrated IC chips and a processing device, utilizing through-silicon vias for electrical coupling and flip-chip bonding for reduced noise and increased signal-to-noise ratio, enabling efficient processing of optical signals for distance and velocity measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional LIDAR systems use separate discrete components for optical sensing and signal processing, then functional reliability is improved, but device complexity and size increase
Solution Approach 1:
The patent combines optical sensing components (photodetector, waveguide) and signal processing components (IC chips) onto a single integrated photonic chip platform. This merging eliminates the need for separate discrete components and their interconnections, thereby reducing device complexity while maintaining functional reliability through integrated design.
Solution Approach 2:
The photonic chip serves multiple functions simultaneously: it acts as an optical waveguide, houses photodetectors for signal detection, and integrates IC chips for signal processing. This multi-functionality consolidates what would traditionally require separate components, reducing overall system complexity while preserving all necessary functions.
2Ease of manufacture
If traditional LIDAR systems use discrete component assembly, then ease of manufacture is improved, but device size increases
Solution Approach 1:
By merging optical and electronic components onto a single photonic chip, the patent dramatically reduces the device volume. The integrated structure eliminates the space required for separate component housings, mounting structures, and interconnections, achieving compact form factor suitable for autonomous vehicle applications.
3Volume of moving object
If LIDAR systems use compact integration, then device size is reduced, but signal-to-noise ratio deteriorates
Solution Approach 1:
The patent introduces specialized intermediary structures including noise shielding layers positioned between the photodetector and IC chips, and optimized waveguide designs that minimize signal loss and interference. These intermediary elements protect the compact integrated structure from degrading signal-to-noise ratio, enabling both compact size and high measurement precision.
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
The solution enables real-time, long-range measurements of range, velocity, azimuth, and elevation, enhancing the spatial awareness capabilities of LIDAR systems in compact form factors, suitable for various applications including autonomous vehicles.
Implementation Method 1
an optical source to generate an optical beam
Implementation Method 2
a photodetector to generate an electrical signal in response to detecting a return signal
Data Source
AI summary
A light detection and ranging (LIDAR) system and apparatus including a photonics chip mounted to a substrate, the photonics chip including one or more optical components and one or more electrical components and one or more integrated circuit (IC) chips mounted to the photonics chip to process an electrical signal generated by the one or more optical components and the one or more electrical components, wherein the one or more IC chips are physically separated from the substrate to reduce crosstalk on the LIDAR apparatus.