Optical Phased Array Interferometer for Process Dispersion Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Beam steering optical phased arrays face errors due to process dispersion, leading to inaccuracies in radiation patterns and increased manufacturing and maintenance costs.
Innovation Solution
The implementation of a beam steering optical phased array configuration that includes an optical signal distributor, phase shifters, and an optical signal interferometer, with specific phase shifters designed to correct for process dispersion errors, enhancing the reliability and accuracy of radiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional beam steering OPA configuration is used, then device simplicity is maintained, but process dispersion errors cause inaccuracies in radiation patterns
Solution Approach 1:
The OPA device is segmented into multiple functional modules: optical signal distributor, phase shifters, antennas, and optical signal interferometer. Each module performs a specific function in the signal processing chain, allowing independent optimization and correction of process dispersion errors at each stage without redesigning the entire system.
Solution Approach 2:
The optical signal interferometer acts as an intermediary component that receives optical signals from antennas and processes them to correct phase errors caused by process dispersion. This intermediary stage enables error correction without directly modifying the antenna array configuration or the optical signal distributor.
2Measurement precision
If phase shifters are added to correct process dispersion errors, then radiation pattern accuracy is improved, but device complexity increases
Solution Approach 1:
The phase shifters serve multiple functions: they control the beam steering direction by adjusting phase differences between antennas and simultaneously correct process dispersion errors. This multi-functionality reduces the need for separate correction components, thereby limiting the increase in device complexity.
Solution Approach 2:
The phase shifters dynamically adjust phase parameters of optical signals to compensate for process dispersion errors. By changing phase parameters rather than modifying physical structures, the system achieves high measurement precision without proportionally increasing device complexity.
3Reliability
If optical signal interferometer is implemented, then process dispersion errors are corrected, but manufacturing cost increases
Solution Approach 1:
The optical signal interferometer replaces complex mechanical alignment and calibration systems with an optical-based error correction mechanism. This substitution simplifies the manufacturing process by eliminating precision mechanical assemblies while maintaining high device reliability through optical phase correction.
Solution Approach 2:
The optical signal interferometer enables the OPA system to self-correct process dispersion errors by processing optical signals internally. This self-service capability reduces the need for external calibration equipment and complex manufacturing processes, thereby controlling manufacturing costs while improving reliability.
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 improves the accuracy of sensor data generated by the beam steering optical phased array, reduces manufacturing and maintenance costs, and enhances the reliability of the device by effectively correcting for process dispersion errors.
Implementation Method 1
The optical signal distributor may be configured to divide and output a plurality of optical signals through separate, respective output terminals of the plurality of output terminals
Implementation Method 2
The plurality of phase shifters may be configured to receive separate, respective optical signals of the plurality of optical signals and shift phases thereof to generate a plurality of phase-shifted optical signals
Implementation Method 3
The optical signal interferometer may include a plurality of first input waveguide regions connected to a limited selection of the plurality of antennas and extending in a first direction, a multi-mode waveguide region connected to the plurality of first input waveguide regions
Data Source
AI summary
A beam steering optical phased array (OPA) may include an optical signal distributor including a plurality of output terminals configured to divide and output input optical signals and phase shifters arranged at the plurality of output terminals and configured to receive the divided optical signals and shift phases thereof to generate phase-shifted optical signals. The beam steering OPA may include antennas configured to receive the phase-shifted optical signals and an optical signal interferometer. The optical signal interferometer may include first input waveguide regions connected to a limited selection of the antennas and extending in a first direction, a multi-mode waveguide region connected to the first input waveguide regions, and a first output waveguide region connected to the multi-mode waveguide region and extending in the first direction. The beam OPA may enable errors due to process dispersion to be effectively corrected, and thus, the beam steering OPA may have enhanced reliability.