Multiplexed photonic Doppler velocimetry enabled by multichannel optical switching: An optimization methodology for crosstalk suppression.

IF 1.7 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
Jianzhong Li, Shouxian Liu, Jing Wang, Jiangbo Lei, Jun Liu, Qixian Peng
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引用次数: 0

Abstract

Recent advancements in velocity measurement, leveraging the benefits of photonic Doppler velocimetry in the domains of shock and detonation physics, explosive safety, and materials physics, have led to the development of array or area velocity measurements for high-fidelity research. However, the direct superimposition of multiple PDVs can result in significant increases in volume, cost, and complexity. In recent years, multiplexed photonic Doppler velocimetry (MPDV) has emerged as an effective solution for measuring velocities at numerous points. While time-division multiplexed MPDV systems have gained attention for circumventing the bandwidth constraints inherent in frequency-division multiplexed approaches, the critical issue of optical crosstalk induced by optical switching components remains insufficiently addressed. Current commercial optical switches with limited isolation performance may introduce channel interference that compromises measurement accuracy in precision experiments. This study presents a novel time-division multiplexed MPDV architecture employing multichannel optical switching modules. Through precise timing control, eight distinct velocity signals with different delay times can be obtained from a single channel, enabling simultaneous recording of 64 velocity signals using two conventional four-channel digitizers. Furthermore, the crosstalk issue can be significantly mitigated through optimized optical switch configurations and probe design modifications. The method's validity has been experimentally verified through an experiment involving explosive-driven metal flyers. This method holds significant potential for further expanding the number of measurement points in MPDV applications.

多通道光交换实现的多路光子多普勒测速:串扰抑制的优化方法。
在速度测量方面的最新进展,利用光子多普勒测速在冲击和爆炸物理、爆炸安全和材料物理领域的优势,导致了用于高保真研究的阵列或区域速度测量的发展。然而,多个pdv的直接叠加会导致体积、成本和复杂性的显著增加。近年来,多路光子多普勒测速技术(MPDV)已成为一种测量多点速度的有效方法。虽然时分多路MPDV系统因避开频分多路方法固有的带宽限制而受到关注,但由光交换元件引起的光串扰的关键问题仍然没有得到充分解决。目前的商用光开关具有有限的隔离性能,可能会引入通道干扰,从而影响精密实验中的测量精度。本文提出了一种采用多通道光交换模块的分时复用MPDV架构。通过精确的定时控制,可以从一个通道获得8个不同延迟时间的不同速度信号,使用两个传统的四通道数字化仪可以同时记录64个速度信号。此外,串扰问题可以通过优化光开关配置和修改探头设计来显著缓解。通过炸药驱动金属飞行器的实验验证了该方法的有效性。该方法具有进一步扩大MPDV应用中测量点数量的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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