Optical Fiber Light Source with Wavelength Conversion Core
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing light source devices with fluorescent materials in light conversion units face issues with heat generation and reduced light source efficiency when arranged at specific positions in the light guide path, requiring complex heat radiation structures and larger lenses to manage temperature and directivity.
Innovation Solution
A light source device incorporating a solid-state light source and an optical transmission fiber with a wavelength conversion core and light guide core, where wavelength conversion materials are dispersed along the fiber to generate population inversion and emit wavelength-converted light, reducing temperature increase and eliminating the need for heat radiation structures, while providing excellent directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the light conversion unit with fluorescent material is arranged at the front side of the light guide path, then the incidence rate of converted light into the light guide path is improved, but heat generation becomes larger requiring heat radiation measures
Solution Approach 1:
The patent extracts the wavelength conversion function from a separate light conversion unit and integrates it into the optical transmission fiber core itself. The wavelength conversion material is dispersed within the fiber core, eliminating the need for a distinct light conversion unit that would require heat radiation management. This integration allows the conversion process to occur along the entire light path rather than at a concentrated point.
Solution Approach 2:
The optical transmission fiber acts as an intermediary medium that simultaneously performs light guidance and wavelength conversion functions. The fiber core with dispersed wavelength conversion material serves as the mediator between the light source and the output, converting excitation light to visible light while guiding it through the fiber structure, thereby eliminating the need for separate heat radiation structures.
2Temperature
If the light conversion unit is arranged on the emission side of the light guide path, then heat radiation is simplified, but the converted light is emitted at random requiring a large-size lens
Solution Approach 1:
The optical transmission fiber is designed to perform multiple functions simultaneously: it guides light from the source, performs wavelength conversion along its length, and maintains directional control of the output light. This multi-functionality eliminates the need for separate components like large lenses that would be required if conversion occurred at the emission end only.
3Adaptability or versatility
If a separate light conversion unit is used with detachable connection, then adaptability is improved, but device complexity and heat radiation structure requirements increase
Solution Approach 1:
The patent merges the wavelength conversion functionality directly into the optical transmission fiber structure. The wavelength conversion material is dispersed within the fiber core, creating an integrated system where the fiber itself performs both light guidance and wavelength conversion. This eliminates the need for separate detachable light conversion units and their associated connection mechanisms.
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 reduces temperature increase, eliminates the need for heat radiation structures, and allows for a downsized luminaire with improved directivity, enabling applications in various lighting scenarios without the requirement for large lenses.
Implementation Method 1
a wavelength conversion core that includes a wavelength conversion material for absorbing the excitation light to generate a population inversion state of electrons and emitting wavelength converted light in a visible light region
Implementation Method 2
a wavelength conversion core that includes a wavelength conversion material for absorbing the excitation light to generate a population inversion state of electrons and emitting wavelength converted light in a visible light region
Implementation Method 3
the wavelength converted light propagating in the light guide core generates stimulated emission, and the excitation light and the wavelength converted light amplified by the stimulated emission are emitted from the second end face
Data Source
AI summary
A light source device according to an embodiment includes a solid-state light source, and an optical transmission fiber. The optical transmission fiber includes a wavelength conversion core, a light guide core, and a clad, the wavelength conversion core absorbing excitation light to generate a population inversion state of electrons and including a wavelength conversion material emitting wavelength converted light in a visible light region, the light guide core covering a periphery of the wavelength conversion core and transmitting the wavelength converted light from a first end face side to a second end face side, and the clad covering a periphery of the light guide core. In the optical transmission fiber, the wavelength converted light propagating in the light guide core generates stimulated emission, and the excitation light and the wavelength converted light amplified by the stimulated emission are emitted from the second end face.