Thermopile Array Beam Profiling for High-Powered Laser Calibration
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Solution Overview
Problem
Conventional beam profilers lack the damage tolerance and calibration methods to accurately assess the beam quality of high-powered lasers, which emit substantial photon energy, leading to inconsistent and unreliable characterization.
Innovation Solution
An array of thermopiles with fixed spatial locations is used to measure energy flux values of high-powered laser light, coupled with a computing system to provide accurate characterization, certification, and calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional beam profilers are used to assess beam quality, then measurement capability is provided, but the device suffers damage due to high photon energy
Solution Approach 1:
The beam profiler is divided into multiple independent photodetector elements arranged in an array, where each element measures a specific spatial region of the beam. This segmentation allows the system to handle high photon energy by distributing the measurement load across multiple robust photodetectors rather than relying on a single sensitive detector
Solution Approach 2:
The patent replaces conventional sensitive optical detectors with thermopile-based photodetectors that convert optical energy directly to thermal energy and then to electrical signals. This substitution uses thermal measurement principles instead of direct optical detection, making the system more tolerant to high photon energy exposure
2Measurement precision
If conventional beam profilers are used, then beam measurement is possible, but calibration methods are lacking leading to inconsistent characterization
Solution Approach 1:
The patent implements a calibration system that changes operational parameters by adjusting the optical power levels and comparing measurements at different power settings. This allows the system to establish calibration curves and correct for non-linear responses, ensuring consistent beam characterization across different operating conditions
Solution Approach 2:
The system incorporates feedback mechanisms where measurement data from the thermopile array is processed and used to adjust calibration parameters. The calibration system continuously refines measurement accuracy by comparing expected versus actual readings and applying correction factors to maintain consistent characterization
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 thermopile array withstands high photon energies without degradation, enabling precise characterization and calibration of high-powered laser beams, ensuring consistent and accurate assessment over time.
Implementation Method 1
an array of thermopiles configured to receive laser light emitted from a high-powered laser... Each thermopile is configured to output an energy flux value of the laser light incident on the thermopile
Data Source
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AI summary
An approach for characterizing laser light (102) emitted from a high-powered laser (100) is disclosed. In one example, the approach is employed by a tool (200) that includes an array of thermopiles (104) and a computing system (202). The array of thermopiles (104) is configured to receive laser light (102) emitted from the high-powered laser (100). Each thermopile has a fixed spatial location relative to each other thermopile within the array of thermopiles (104). Each thermopile is configured to output an energy flux value (208) of the laser light (102) incident on the thermopile. The computing system (202) is configured to receive a set of energy flux values (208) from the array of thermopiles (104) based at least on the laser light (102) emitted by the high-powered laser (100) being incident on the array of thermopiles (104) and output a characterization (210) of the laser light (102) emitted by the high-powered laser (100) based at least on the set energy flux values (208) received from the array of thermopiles (104).