Multi-Beam Laser Resonant Cavity Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lasers have low laser beam generation efficiency and high costs due to the need for additional beam splitting structures or multiple lasers to produce multiple beams at the same frequency, which limits their application in optical communications.
Innovation Solution
A laser design featuring a resonant cavity with a highly reflective surface, an active gain region, a phase shift region, an optical branching region, and multiple reflective mode selection regions, which allows for the efficient generation of multiple laser beams at the same wavelength without additional beam splitting structures, using a III-V compound for spontaneous emission and a lens for spot adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If additional beam splitting structures or multiple lasers are used to generate multiple laser beams at the same frequency, then the number of laser beams output is increased, but the device complexity and cost increase
Solution Approach 1:
The resonant cavity is divided into multiple reflective mode selection regions (N≥2), each capable of selecting and outputting laser beams at the same wavelength. This segmentation allows a single laser device to generate multiple laser beams simultaneously without requiring additional beam splitting structures or multiple lasers, thereby increasing the number of output beams while maintaining simple device architecture
Solution Approach 2:
The resonant cavity is designed with multi-functional capabilities to support multiple reflective mode selection regions that can independently output laser beams at the same frequency. This universal design enables a single device to perform the function of generating multiple laser beams, eliminating the need for additional beam splitting structures or multiple separate lasers
2Quantity of substance
If additional beam splitting structures or multiple lasers are used to generate multiple laser beams at the same frequency, then the number of laser beams output is increased, but the cost increases
Solution Approach 1:
The resonant cavity is divided into multiple reflective mode selection regions (N≥2), each capable of selecting and outputting laser beams at the same wavelength. This segmentation allows a single laser device to generate multiple laser beams simultaneously without requiring additional beam splitting structures or multiple lasers, thereby increasing the number of output beams while maintaining simple device architecture
Solution Approach 2:
The resonant cavity is designed with multi-functional capabilities to support multiple reflective mode selection regions that can independently output laser beams at the same frequency. This universal design enables a single device to perform the function of generating multiple laser beams, eliminating the need for additional beam splitting structures or multiple separate lasers
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 enhances laser beam generation efficiency and reduces costs by enabling the output of multiple laser beams from a single device, improving performance and reducing the average cost per beam.
Implementation Method 1
The active gain region includes a III-V compound and is configured to generate spontaneous emission light under the effect of forward bias
Implementation Method 2
the first phase shift region is configured to tune a spectral position of a longitudinal mode of the resonant cavity by changing a refractive index of the first phase shift region
Implementation Method 3
a reflectivity of the highly reflective surface is greater than peak reflectivities of the N reflective mode selection regions
Implementation Method 4
the spot adjustment region is specifically a lens and disposed in the empty slot
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A laser provided by embodiments of the present invention includes a substrate and a resonant cavity. In addition to an active gain region, a first phase shift region, an optical branching region, and N reflective mode selection regions, the resonant cavity further includes a highly reflective surface, where a reflectivity of the highly reflective surface is greater than reflectivities of the N reflective mode selection regions, so that laser beams are output from the N reflective mode selection regions. Because the laser naturally includes at least two reflective mode selection regions, at least two laser beams are output. According to the laser provided by the embodiments of the present invention, one laser can output two laser beams or even multiple laser beams; therefore, laser beam generation efficiency is high and average costs for generating a single laser beam are accordingly reduced.