Flat Lens Nanostructures for Gaussian Beam Phase Control
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Solution Overview
Problem
Conventional lenses are inadequate for precise Gaussian beam transformation, leading to substantial aberrations in applications like optical fiber communications and LiDAR systems, as they are not designed to provide the necessary phase changes for Gaussian beams.
Innovation Solution
An optical system comprising a flat lens or phase plate with nanostructures that impart arbitrary phase profiles to transform incoming Gaussian beams into outgoing Gaussian beams, allowing for focusing, collimation, or maintaining a collimated state, by determining the dimensions and positions of the nanostructures based on the required phase changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional lenses are used for Gaussian beam transformation, then basic focusing and collimation functions are achieved, but substantial aberrations are introduced due to inability to provide exact phase changes
Solution Approach 1:
The patent segments the lens into multiple zones or regions, each with specifically designed phase profiles. By dividing the lens structure into discrete functional zones, each zone can independently provide the exact phase change required for Gaussian beam transformation, eliminating the aberrations that occur in conventional unified lens designs.
Solution Approach 2:
The patent implements local quality by assigning different phase profiles to different regions of the lens. Each local zone is optimized with specific refractive index variations or geometric features tailored to provide the precise phase transformation needed at that location, enabling accurate Gaussian beam control without introducing aberrations.
2Adaptability or versatility
If conventional lenses are designed for general light transformation, then broad applicability is achieved, but they cannot provide the exact phase changes needed for Gaussian beams
Solution Approach 1:
The patent employs parameter changes by varying the refractive index, thickness, or geometric parameters of different lens zones to achieve specific phase profiles. By adjusting these parameters locally across the lens structure, the system can precisely control Gaussian beam transformation while maintaining design flexibility for different applications.
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 optical system effectively transforms Gaussian beams with high efficiency, achieving precise control over beam waist and divergence, thereby reducing aberrations and improving performance in applications such as VCSEL-based systems.
Implementation Method 1
a lens structure (202) configured to generate an outgoing Gaussian beam based on an incoming Gaussian beam... determine dimensions and a position of each of the plurality of unit elements based on a phase change required to be provided by each of the plurality of unit elements
Data Source
AI summary
Various embodiments may relate to an optical system. The optical system may include a lens structure configured to generate an outgoing Gaussian beam based on an incoming Gaussian beam. The optical system may also include a light source configured to provide the incoming Gaussian beam to the lens structure. The lens structure may be a flat lens or a phase plate.