Organic Laser Device With Waveguide Resonator
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Solution Overview
Problem
Current organic laser devices using a dye thin film as a laser medium face challenges due to low optical gain and high light absorption by electrodes, making it difficult to achieve high luminance, efficiency, and stability, and the complexity of manufacturing processes limits their practical application.
Innovation Solution
An organic laser device is developed with an indirect excitation method that eliminates the need for a glass substrate, featuring a light-emitting element with a transparent electrode close to the laser medium, allowing for high light coupling efficiency and a simpler manufacturing process, enabling the production of a compact, lightweight device with a desired emission wavelength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a resonator structure is formed in a direction perpendicular to the film surface, then the device structure is compact, but the optical gain becomes low due to short electrode distance and high light absorption by electrodes
Solution Approach 1:
The patent transitions from vertical resonator configuration (perpendicular to film surface) to a waveguide resonator structure where light propagation is parallel to the film surface. This dimensional change allows the light path to extend laterally through the organic thin film, increasing the effective optical gain path length while maintaining device compactness through planar integration.
Solution Approach 2:
The patent introduces a waveguide structure as an intermediary component that directs and confines light propagation within the organic thin film. The waveguide acts as a mediator between the light source and the resonator, enabling efficient light coupling and maintaining high optical gain by preventing light absorption by electrodes while preserving compact device geometry.
2Power
If substances are selected to meet high luminance and high efficiency conditions, then the light-emitting layer performs well, but it becomes difficult to eliminate light absorption loss by all organic thin films and achieve high stability
Solution Approach 1:
The patent applies local quality by optimizing different organic thin film layers for specific functions: the light-emitting layer is designed for high luminance and efficiency, while other organic thin films in the optical path are selected or modified to minimize light absorption. This localized optimization allows each layer to perform its specific function without compromising overall device stability.
Solution Approach 2:
The patent employs parameter changes by carefully selecting and adjusting the optical and electrical parameters of different organic materials used in various thin film layers. By changing material parameters such as absorption coefficients, energy levels, and stability characteristics, the patent achieves high luminance and efficiency in the light-emitting layer while minimizing light absorption losses in other layers, thereby improving overall device stability.
3Reliability
If a glass substrate is used to support the dye thin film with optical resonator, then the device structure is stable, but the manufacturing process becomes complicated and the device size increases
Solution Approach 1:
The patent merges the substrate function with the device structure by integrating the support function directly into the planar device architecture without requiring a separate glass substrate. The organic thin film layers and electrode structures are configured to provide both structural support and optical functionality, combining multiple functions into a unified planar structure that reduces manufacturing complexity and device size while maintaining stability.
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 allows for the creation of a small, lightweight organic laser device with improved light coupling efficiency and reduced manufacturing complexity, enabling the production of a compact, high-performance organic laser with desired emission characteristics.
Implementation Method 1
a light-emitting element having a light-emitting layer between a pair of electrodes
Implementation Method 2
allowing light from the light-emitting element to be led to a laser medium provided with an optical resonator
Implementation Method 3
laser medium provided with an optical resonator
Data Source
AI summary
To provide a small and lightweight organic laser device which can be manufactured in a reproductive manner and from which laser light with a desired wavelength can be obtained. A first substrate provided with a light-emitting element having a light-emitting layer between a pair of electrodes and a second substrate provided with a laser medium including a laser dye face each other and one of the pair of electrodes, which is placed between the light-emitting layer and the laser medium, has a light transmitting property. With such a structure, a laser device with which a laser medium and a light source are integrated can be provided.