Scatter-Cavity Non-Resonant Laser for Directional Light Output
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Solution Overview
Problem
Non-resonant lasers suffer from low energy efficiency and low light directionality due to high light loss and diffuse emission, limiting their application and substitutability with other light sources.
Innovation Solution
A high-efficiency and directional non-resonant laser is designed using a scattering cavity with a gain medium unit and a pumping and supply unit, where the scattering cavity is shaped to contain light effectively, allowing for efficient pumping and emission light amplification, and the entrance is optimized for directionality and spatial coherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a scatterer is added to construct non-resonance feedback, then various gain media can be used, but light loss increases and energy efficiency decreases
Solution Approach 1:
The cavity is segmented into multiple reflective surfaces with different functions: diffuse reflective surfaces for light trapping and directionless reflection, and specular reflective surfaces for directional feedback. This segmentation allows the system to maintain versatility with various gain media while reducing energy loss through optimized light paths.
Solution Approach 2:
Different regions of the cavity have different reflective properties - some surfaces are diffuse reflectors and others are specular reflectors. This local differentiation enables the cavity to simultaneously trap light effectively and provide directional feedback, resolving the contradiction between versatility and energy efficiency.
2Adaptability or versatility
If a scatterer is added to construct non-resonance feedback, then various gain media can be used, but light directionality decreases
Solution Approach 1:
The reflective surfaces are segmented into diffuse and specular types, with the specular surfaces strategically positioned to provide directional feedback. This segmentation maintains adaptability to various gain media while preserving light directionality through the directional reflective paths.
Solution Approach 2:
The cavity employs asymmetric reflective surface distribution, with specular reflective surfaces positioned to create preferred light paths. This asymmetry enables the system to maintain versatility with different gain media while achieving directional light output, countering the isotropic scattering problem.
3Shape
If a resonator is constructed using a mirror to amplify light, then light directionality is maintained, but the type of gain medium is limited to transparent materials
Solution Approach 1:
The resonator is segmented into diffuse and specular reflective surfaces, allowing the use of opaque gain media while maintaining directional feedback through the specular surfaces. This segmentation removes the transparency requirement for gain media while preserving light directionality.
Solution Approach 2:
The diffuse and specular reflective surfaces act as intermediaries between the opaque gain medium and the external environment. These surfaces enable light extraction and directional feedback without requiring the gain medium to be transparent, thus expanding material selection while maintaining directionality.
4Adaptability or versatility
If many optical paths are provided in a non-resonant laser cavity, then non-resonance feedback is achieved, but spatial coherence decreases
Solution Approach 1:
The optical paths are segmented into multiple diffuse reflection paths for feedback and fewer specular reflection paths for directional output. This segmentation maintains the non-resonant feedback mechanism while preserving spatial coherence through the controlled directional paths.
Solution Approach 2:
Different regions of the cavity provide different optical path characteristics - diffuse regions for feedback and specular regions for coherent directional output. This local quality differentiation enables non-resonant feedback while maintaining spatial coherence in the emitted light.
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 solution achieves high energy efficiency and directionality, enabling the use of opaque gain media and simplifying laser manufacturing without crystallization processes, thus expanding the applicability of non-resonant lasers to new wavelength regions.
Implementation Method 1
a scattering cavity in which a gain medium is added and light is effectively contained
Data Source
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AI summary
Various embodiments provide a high-efficiency and directional non-resonant laser using a scattering cavity and a method of manufacturing the same. According to various embodiments, the non-resonant laser may include a gain medium unit in which a scattering cavity and an entrance communicating with the scattering cavity are provided, and a pumping and supply unit configured to supply pumping light to an inside of the scattering cavity. The gain medium unit may be implemented to be excited by the pumping light on the inside of the scattering cavity and to output emission light through the entrance. According to various embodiments, the gain medium unit may weaken the pumping light while reflecting the pumping light on the inside of the scattering cavity, and may amplify the emission light while reflecting the emission light on the inside of the scattering cavity.