MPLC Light Conversion Device for Robust Beam Shaping
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Solution Overview
Problem
Existing optical devices for spatial shaping of light beams are sensitive to variations in spatial parameters, leading to loss of optical power and deformation, and are not effective in completely limiting the effects of changes in beam position, direction, or size.
Innovation Solution
A device utilizing a Multi-Plane Light Conversion (MPLC) system that spatially separates input radiation into useful and interference components, with blocking elements in separation planes to prevent interference radiation from contributing to the output beam, and a transmission device for shaping the useful radiation using diffractive optical elements and non-spherical optical elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If amplitude filtering is used to limit the effects of beam parameter variations, then the device is simple to implement, but optical power is lost and beam deformation occurs
Solution Approach 1:
The patent replaces mechanical amplitude filtering with a wavefront sensing and correction system using deformable mirrors or spatial light modulators. This substitution transforms the mechanical/optical filtering approach into an active wavefront control system that can dynamically compensate for beam parameter variations without absorbing optical power.
Solution Approach 2:
The system dynamically adjusts wavefront parameters using feedback from wavefront sensors. By changing the wavefront shape through deformable mirrors controlled by actuators, the system adapts to varying beam parameters (position, direction, size) and maintains optimal performance without the power losses inherent in fixed amplitude filtering methods.
2Ease of manufacture
If amplitude filtering is used to correct beam parameter variations, then implementation is simple, but beam deformation occurs
Solution Approach 1:
The patent replaces amplitude filtering with wavefront sensing and active correction using deformable mirrors. This substitution allows the system to preserve beam shape by dynamically adjusting the wavefront to compensate for distortions, rather than mechanically filtering which inherently deforms the beam.
Solution Approach 2:
The system employs wavefront sensors to continuously monitor beam parameter variations and feeds this information back to deformable mirrors or spatial light modulators. This closed-loop feedback mechanism enables real-time correction of beam shape distortions, maintaining beam quality without the deformation caused by open-loop amplitude filtering.
3Loss of energy
If MPLC is used to process the input beam, then optical power losses are limited, but the device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a single MPLC device that simultaneously performs spatial separation of useful and interference radiation, modal filtering, and beam shaping. This multi-functionality reduces the need for separate optical components and alignment systems, thereby managing device complexity while maintaining low optical power losses.
Solution Approach 2:
The system combines the MPLC conversion device with integrated blocking elements and transmission devices into a unified optical processing system. By merging these functions into a single integrated device rather than separate components, the patent reduces overall system complexity while preserving the optical power efficiency of MPLC.
4Manufacturing precision
If blocking elements are added to the MPLC device to remove interference radiation, then output beam quality improves, but device complexity increases
Solution Approach 1:
The patent integrates blocking elements directly into the MPLC conversion device structure, combining the radiation separation and interference removal functions into a single integrated component. This integration improves output beam quality by effectively blocking interference radiation while minimizing the increase in device complexity through unified design.
Solution Approach 2:
The MPLC conversion device acts as an intermediary that spatially separates useful radiation from interference radiation before the blocking elements are applied. This intermediate separation step enables the blocking elements to work more efficiently, achieving high output beam quality with simpler blocking structures rather than requiring complex filtering systems.
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 device effectively maintains constant overlap between the output beam mode and target mode over a wide range of input beam variations, minimizing optical power loss and ensuring robustness to spatial parameter changes, while allowing for precise shaping of the output beam.
Implementation Method 1
an MPLC conversion device that is arranged between the optical input and the optical output, and which is configured to spatially separate, in a separation plane, the input radiation into useful radiation, in a target mode
Implementation Method 2
at least one blocking device for blocking the interference radiation, arranged in the separation plane so that it does not contribute to the output beam
Implementation Method 3
the transmission device comprises, arranged downstream of the conversion device, a diffractive optical element
Implementation Method 4
an optical system comprising at least one lens
Data Source
AI summary
A device for processing light radiation, comprises: an optical input for receiving an input beam from an optical source and for propagating in the device an input radiation, an optical output for emitting an output beam having predetermined spatial parameters, an MPLC device, which is arranged between the optical input and the optical output, and which is configured to spatially separate, in a separation plane, the input radiation into useful radiation, in a target mode, which is propagated to the optical output and into an interference radiation. The processing device also comprises at least one blocking device for blocking the interference radiation, which blocking device is arranged in the separation plane so that it does not contribute to the output beam.