Coherent LIDAR Optical Antenna Arrays With Switchable Field-of-View Scanning
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Solution Overview
Problem
Conventional LIDAR systems rely on mechanical moving parts for beam steering, which can be bulky, costly, and unreliable, particularly in applications like autonomous vehicles where solid-state solutions are desired.
Innovation Solution
The implementation of a scalable and switchable optical antenna array architecture, combined with a lens, forms a real-time addressable focal plane array for solid-state beam steering in coherent LIDAR systems, eliminating the need for mechanical parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical moving parts are used for beam steering, then beam steering capability is achieved, but device complexity and bulk increase
Solution Approach 1:
The patent replaces mechanical moving parts with an optical switch array that electronically controls light routing through multiple optical paths. Instead of mechanically steering a single beam, the system uses electrical signals to direct light through different waveguides and optical antennas, eliminating mechanical components while maintaining beam steering capability.
Solution Approach 2:
The patent divides the beam steering function into multiple discrete optical paths, each controlled by individual optical switches. The single beam steering task is segmented into multiple routing decisions through an optical switch array, where each switch controls a specific optical path, replacing the monolithic mechanical steering mechanism.
2Ease of operation
If mechanical moving parts are used for beam steering, then beam steering is achieved, but reliability decreases
Solution Approach 1:
The patent eliminates mechanical moving parts that are prone to wear, friction, and failure by using solid-state optical switches and waveguides. The electronic control system provides reliable, contactless switching of optical paths, significantly improving system reliability compared to mechanical beam steering mechanisms.
3Reliability
If optical switch array is used instead of mechanical parts, then reliability is enhanced, but device complexity increases
Solution Approach 1:
The patent integrates multiple optical switches, waveguides, and optical antennas into a unified photonic integrated circuit structure. The optical switch array is merged with the waveguide network and antenna elements on a single chip, reducing overall device complexity compared to assembling separate mechanical components.
Solution Approach 2:
The optical switch array serves multiple functions simultaneously: it routes light to different optical antennas for beam steering, controls transmission timing, and enables multi-directional scanning. This multi-functionality reduces the need for separate dedicated components, effectively managing device complexity.
4Adaptability or versatility
If multiple optical antenna arrays are used, then field of view coverage is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the optical antenna system into multiple arrays, each responsible for a specific field of view sector. The optical switch array selectively activates appropriate antenna arrays based on the desired scanning direction, enabling wide field of view coverage through modular segmentation that simplifies manufacturing of each individual array.
Solution Approach 2:
The patent implements dynamic switching between multiple optical antenna arrays using an electronically controlled optical switch array. Instead of manufacturing a single complex static system, the dynamic activation of different antenna arrays based on scanning requirements allows for simpler, standardized modular units that can be selectively deployed.
Data Source
AI summary
A light detection and ranging (LIDAR) transceiver includes optical antenna arrays and an optical switch. Some of the optical antenna arrays include a number of optical antennas and an optical splitter coupled to the optical antennas. The optical splitter may include a number of passive optical splitters. The optical splitter provides a portion of an input signal to the optical antennas. The optical switch is configured to selectively provide the input signal to at least one of the plurality of optical antenna arrays. The optical switch enables addressable field of view scanning by selectively providing the input signal to the plurality of antenna arrays, one array at a time.