Laser Module Optical Layout for Uniform Beam Condensing
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Solution Overview
Problem
Existing laser modules with multiple semiconductor laser light sources face difficulties in adjusting the positions of these sources due to their stepwise arrangement, leading to challenges in achieving uniform light condensing positions and angles, which affects output and beam parameter product (BPP).
Innovation Solution
A laser module design that includes a first substrate supporting first and second semiconductor laser light sources, with distinct optical path lengths and positions, and a mirror system that multiplexes and condenses beams using polarization beam combiners or dichroic mirrors, allowing for easy adjustment and uniform light condensing through composite modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple semiconductor laser light sources are arranged in a stepwise manner to achieve high output, then the output power is improved, but the position adjustment difficulty increases
Solution Approach 1:
The patent transitions from a stepwise one-dimensional arrangement to a two-dimensional planar arrangement where multiple semiconductor laser light sources are mounted on the same plane of a substrate. This dimensional change enables easier position adjustment while maintaining high output power through parallel arrangement of multiple light sources.
Solution Approach 2:
The patent divides the laser system into multiple independent semiconductor laser light sources that can be individually adjusted and mounted on a common substrate. This segmentation allows independent position optimization of each light source while achieving cumulative high output power.
2Power
If multiple semiconductor laser light sources are arranged in a stepwise manner, then high output is achieved, but the uniformity of light condensing position and angle deteriorates
Solution Approach 1:
By arranging light sources on the same plane rather than in steps, the optical paths to the condensing lens become more uniform, improving the consistency of light condensing positions and angles while maintaining high output power.
Solution Approach 2:
The patent allows individual position adjustment of each semiconductor laser light source on the substrate plane, enabling local optimization of each light source's position and angle to achieve uniform light condensing characteristics across all sources.
3Power
If stepwise arrangement of light sources is used, then high output power is achieved, but the complexity of the optical system increases
Solution Approach 1:
The planar arrangement simplifies the optical system by eliminating the need for complex stepwise positioning mechanisms and multiple adjustment stages, reducing overall system complexity while maintaining high output power through parallel light source configuration.
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 design enables easy adjustment and mounting of semiconductor laser light sources, uniform temperature control, and improved reliability, resulting in a high output and uniform light condensing angles, thereby enhancing the beam parameter product (BPP) and multiplexing capabilities.
Implementation Method 1
a first mirror configured to reflect the first beam emitted in the first direction from the first semiconductor laser light source
Implementation Method 2
a second mirror configured to transmit the first beam reflected by the first mirror in a second direction different from the first direction and reflect the second beam emitted from the second semiconductor laser light source in the second direction
Implementation Method 3
a second mirror configured to transmit the first beam reflected by the first mirror in a second direction different from the first direction and reflect the second beam emitted from the second semiconductor laser light source in the second direction
Implementation Method 4
a light condensing optical system configured to condense the first beam and the second beam from the second mirror
Data Source
AI summary
A laser module including first and second light sources, a second mirror transmitting a first beam reflected by a first mirror and reflecting a second beam emitted from the second light source, and a light condensing optical system, wherein the first beam is condensed at a first position in an optical path from the first light source to the first mirror, the second beam is condensed at a second position in an optical path from the second light source to the second mirror, an optical path length from the first light source to the first position is larger than an optical path length from the second light source to the second position, and an optical path length from the first light source to the light condensing optical system is larger than an optical path length from the second light source to the light condensing optical system.