Fiber Array Energy Transmission System Based on Dammann Grating Coupling
Citation
佘日银 (She Riyin), 李德洪 (Li Dehong), 陈东文 (Chen Dongwen), & 李勇 (Li Yong). (2021). 基于达曼光栅耦合的光纤阵列能量传输系统 (Fiber Array Energy Transmission System Based on Dammann Grating Coupling). 激光与光电子学进展 (Laser & Optoelectronics Progress), 58(1), 0105001-0105008. doi: 10.3788/LOP202158.0105001.
Keywords
- 光纤阵列 / Fiber Array
- 达曼光栅 / Dammann Grating
- 耦合 / Coupling
- 能量传输 / Energy Transmission
- 基模高斯光 / Fundamental-mode Gaussian Light
- 分束 / Beam Splitting
- 系统参数设计 / System Parameter Design
- 衍射效率 / Diffraction Efficiency
- 不均匀度 / Inhomogeneity
- 光斑半径 / Spot Radius
- 光斑间距 / Spot Spacing
- 准直透镜系统 / Collimating Lens System
- 聚焦透镜 / Focusing Lens
- 数值孔径 / Numerical Aperture - NA
Brief
This article proposes a fiber array energy transmission system using Dammann grating coupling for high-power fundamental-mode Gaussian light and presents a parameter design method to achieve efficient coupling by addressing the specific requirements of fiber arrays.
Summary
This article introduces a system for transmitting high-power laser energy using a fiber array coupled by a Dammann grating. It addresses the need for efficient coupling of a single fundamental-mode Gaussian laser beam into multiple small-core fibers to overcome limitations of single large-core fibers. The study includes mathematical modeling and MATLAB simulations showing the beam splitting characteristics of the Dammann grating. A key finding is that the traditional formula for sub-spot radius based on plane waves is not suitable for Gaussian beams, and the sub-spot radius is inversely proportional to the incident beam radius. The article also presents and experimentally verifies a general parameter design method to achieve precise coupling by adjusting various optical component parameters to match the sub-spots with the fiber array requirements.
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