Design of optical fiber array coupling system for multi-channel photonic Doppler velocimetry
Citation
牟瑞欣 (MU Ruixin), 张建 (ZHANG Jian), 安飞 (AN Fei), 杨芝艳 (YANG Zhiyan), 马丽娜 (MA Lina). (2020). 多点光子多普勒测速光纤阵列耦合系统设计 (Design of optical fiber array coupling system for multi-channel photonic Doppler velocimetry). 光学技术 (OPTICAL TECHNIQUE), 46(4), 443-447. doi: 10.13741/j.cnki.11-1879/o4.2020.04.011
Keywords
- 光子多普勒测速 / Photonic Doppler Velocimetry
- 光纤阵列 / Optical Fiber Array
- 鱼眼镜头 / Fisheye Lens
- 机械耦合 / Mechanical Coupling
- 回损测量 / Return Loss Measurement
- 多点测速 / Multi-point Velocimetry
- 大视场 / Large Field of View
- 爆轰物理、冲击波物理、强激光 / Detonation Physics, Shock Wave Physics, High Laser
- 高效率光纤阵列耦合系统 / High-Efficiency Fiber Array Coupling System
- 高精度机械零件及定心装调 / High-Precision Mechanical Parts and Centering Adjustment
- 光纤端面抛光 / Optical Fiber End Face Polishing
- 六边形排列结构 / Hexagonal Arrangement Structure
- 菲涅尔反射 / Fresnel Reflection
Brief
This article presents the design and application of a high-efficiency optical fiber array coupling system using a fisheye lens for multi-channel photonic Doppler velocimetry, achieving precise mechanical coupling and low return loss for multi-point velocity measurements.
Summary
This article describes the design of a high-efficiency optical fiber array coupling system that utilizes a fisheye lens for multi-channel Photonic Doppler Velocimetry (PDV). The system aims to enable multi-point velocity measurements in areas like detonation physics and shock wave physics. It details the design of a 120° fisheye lens, the fabrication of a 37-fiber hexagonal array with 8° polished ends, and the precise mechanical coupling of the array to the lens. The achieved return loss for each fiber bundle was greater than 55dB, meeting the design requirements. Ultimately, this work provides a new structural approach for expanding the spatial range of multi-point measurements in PDV systems by coupling a fiber array with a single fisheye lens.
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