Laser Beam Combining Module With Mirror Alignment for Optical Fiber Coupling
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Solution Overview
Problem
Existing light-emitting modules face challenges in aligning the traveling direction of laser beams emitted from semiconductor laser elements with the designed direction, leading to inefficiencies in combining multiple laser beams.
Innovation Solution
A light-emitting module design incorporating a support base with placement surfaces, mirror members, and a condensing lens that aligns and combines laser beams using a series of reflective surfaces and lenses to correct deviations in beam direction, ensuring they converge onto an optical fiber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple semiconductor laser elements are used to increase output power, then the power of the laser beam is improved, but the deviation between the traveling direction of the laser beam and the designed traveling direction increases
Solution Approach 1:
The patent divides the beam combining system into multiple independent light-emitting devices, each handling a subset of laser beams. This segmentation allows each device to manage fewer beams with better alignment precision, while the overall system achieves high power through combination of multiple segmented units.
Solution Approach 2:
The patent introduces optical components (lenses and mirrors) as intermediaries between the semiconductor laser elements and the final beam combination point. These intermediaries correct beam direction deviations and enable precise alignment of multiple laser beams before combination, resolving the alignment precision issue while maintaining high output power.
2Manufacturing precision
If the number of optical components is increased to correct beam direction deviation, then the alignment precision of laser beam is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple optical functions (beam direction correction, focusing, and combination) into integrated optical assemblies. By merging these functions into cohesive units rather than separate components, the design achieves precise beam alignment while reducing overall device complexity and improving manufacturability.
Solution Approach 2:
The patent designs optical components that perform multiple functions simultaneously. For example, certain optical assemblies both correct beam direction deviations and focus beams for combination, reducing the total number of components needed while maintaining high alignment precision.
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 effectively reduces deviations in laser beam direction, allowing for high-power combined light emission by aligning and combining multiple laser beams efficiently.
Implementation Method 1
The first reflective surface reflects the laser beam to change a traveling direction of the laser beam to a direction away from the mounting surface of the substrate
Implementation Method 2
The second reflective surface reflects the laser beam reflected by the first reflective surface to further change the traveling direction of the laser beam to a second direction intersecting the first direction
Implementation Method 3
Each of the plurality of third mirror members has a third reflective surface that reflects the laser beam traveling in the second direction to change the traveling direction of the laser beam to the first direction
Implementation Method 4
The condensing lens combines a plurality of laser beams obtained by the laser beams emitted from the plurality of light-emitting devices being reflected by the third reflective surface, and allows the combined light to be incident on an optical fiber
Data Source
AI summary
A light-emitting module includes: a support base having a plurality of placement surfaces arranged in a first direction; a plurality of light-emitting devices each disposed on the respective corresponding placement surface, and each including a semiconductor laser element, a first mirror member, a cover, and a second mirror member; a plurality of third mirror members; and a condensing lens. The first mirror member changes a traveling direction of a laser beam emitted from the semiconductor laser element. The cover transmits the laser beam having the changed traveling direction. The second mirror member further changes the traveling direction of the laser beam transmitted through the cover to a second direction. Each third mirror member changes the traveling direction of the laser beam from the second direction to the first direction. The condensing lens combines a plurality of laser beams and allows the combined light to be incident on an optical fiber.