Multi-Beam Solid Laser Fiber Coupling Without Motor Switching
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Solution Overview
Problem
Existing solid-state lasers face challenges in achieving high output power due to the thermal lens effect in laser crystals under high repetition rate conditions, and the complexity of coupling multiple laser light paths into a single optical fiber.
Innovation Solution
A solid-state laser system comprising a laser emitting module with integrated laser emitting units, a reflection module, and a coupling module that sequentially aligns and couples multiple independent laser beams into a single transmission fiber, reducing the need for complex optical elements and motor-driven switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple laser light paths are coupled using motor-driven switching, then laser output power can be increased, but device complexity and operational difficulty increase
Solution Approach 1:
The patent divides the laser system into multiple independent laser emitting units, each generating its own laser beam. These segmented units are then coupled through a beam combining optical system, allowing power scaling without requiring a single high-power laser crystal that would suffer from thermal lensing effects.
Solution Approach 2:
The patent merges multiple independent laser beams into a single combined beam using a beam combining optical system. This allows the system to achieve high output power by combining the output of multiple lower-power laser units, avoiding the thermal management problems of single high-power lasers.
2Power
If multiple discrete optical elements are used for beam coupling, then laser output power can be increased, but ease of operation deteriorates due to multi-dimensional spatial adjustments
Solution Approach 1:
The patent employs a nested optical configuration where beam combining optical elements are integrated within a compact housing structure. The optical elements are arranged in a nested manner that reduces the number of independent adjustment dimensions, making the system easier to align and operate while maintaining high power output capability.
3Productivity
If multiple laser beams are coupled into a single optical fiber, then productivity is improved, but device complexity increases due to the need for precise alignment
Solution Approach 1:
The beam combining optical system is designed with universal optical elements that can handle multiple laser beams simultaneously. The optical components are configured to perform multiple functions including beam steering, focusing, and combining in a single integrated system, reducing the total number of optical elements needed while maintaining high coupling efficiency.
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 enhances laser output power while simplifying the structure and operation, enabling efficient coupling of multiple laser beams into a single fiber without the need for motor-driven switching, thus reducing production costs and complexity.
Implementation Method 1
The reflection module comprises a first reflection unit and a second reflection unit arranged sequentially along a direction of an optical path; the first reflection unit and the second reflection unit are sequentially located on the propagation path of the laser beams and are configured to sequentially reflect the laser beams to the coupling module.
Implementation Method 2
The coupling module is coaxially arranged with the second reflection unit, and is configured to receive the laser beam reflected by the second reflection unit and couple the laser beams into at least four laser beams to enter the transmission fiber.
Data Source
AI summary
Disclosed are a solid-state laser and a solid-state laser system, including a laser emitting module, a reflection module, a coupling module and a transmission fiber arranged sequentially along a direction of an optical path. The laser emitting module includes at least four laser emitting units integrated in a same integrated chamber, and the laser beams emitted by each laser emitting unit are parallel and independent to each other. The reflection module includes a first reflection unit and a second reflection unit arranged sequentially along the direction of the optical path. The coupling module and the second reflection unit are coaxially arranged and configured to adjust the emission angle of the laser beams, and couple at least four laser beams adjusted by the coupling module into the transmission fiber.