Laser Light Source Module With Wedge Beam Overlap for High Red Output
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Solution Overview
Problem
The existing laser light source modules for projectors face challenges in achieving high red laser output power without increasing production costs, due to the complexity of optical design and larger light receiving areas required for multiple red light sources.
Innovation Solution
A laser light source module that includes a red semiconductor laser chip with multiple resonant cavities, a wedge structure, a plano-convex lens, and an optical fiber. The wedge structure refracts the light beams from the dual resonant cavities to overlap them, forming a single light beam that reduces the light receiving area and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of red light source is increased for enhancing red laser output power, then the output power of red laser is improved, but the optical design becomes complicated and the light receiving area becomes larger
Solution Approach 1:
The red laser light source is segmented into multiple resonant cavities (first resonant cavity, second resonant cavity, and third resonant cavity) within a single laser chip. Each resonant cavity emits light beams that are subsequently combined through the wedge structure, achieving high output power without requiring multiple separate light source components.
Solution Approach 2:
Multiple light beams from different resonant cavities are merged into a single light beam through the wedge structure. The first light beam and second light beam from the first and second resonant cavities are refracted and overlapped to form a third light beam, which is then combined with the fourth light beam from the third resonant cavity, simplifying the optical design while maintaining high power output.
2Power
If the number of red light source is increased for enhancing red laser output power, then the output power of red laser is improved, but the light receiving area becomes larger
Solution Approach 1:
The wedge structure utilizes spatial dimensionality to redirect and overlap light beams from multiple resonant cavities. By refracting the first light beam and second light beam at different angles through the inclined surfaces of the wedge structure, the beams are converged into a single spatial path, reducing the light receiving area required.
3Power
If the number of red light source is increased for enhancing red laser output power, then the output power of red laser is improved, but the production cost increases
Solution Approach 1:
Multiple light beams from different resonant cavities are merged into a single light beam that can be received by a single optical fiber. This merging reduces the number of optical fibers and associated components needed, thereby reducing production costs while maintaining high power output.
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 enhances the output power of the red laser while reducing the light receiving area and production costs, maintaining light receiving efficiency and enabling the module to be applied in projection systems with small light receiving areas.
Implementation Method 1
The wedge structure is configured to refract the first light beam and the second light beam into a third light beam and make the first light beam and the second light beam overlap each other
Implementation Method 2
the plano-convex lens is configured to focus the third light beam from the wedge structure to form a fifth light beam
Data Source
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AI summary
A laser light source module includes a laser chip, a wedge structure, a plano-convex lens, and an optical fiber. The laser chip is configured to emit a first light beam and a second light beam. The wedge structure is configured to refract the first light beam and the second light beam into a third light beam and make the first light beam and the second light beam overlap each other. The wedge structure is located between the laser chip and the plano-convex lens. The plano-convex lens is located between the wedge structure and the optical fiber.