| 光电调制反馈激光多普勒测速仪研究 |
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| 引用本文： | 史绍熙,王仕康,郭晓明.光电调制反馈激光多普勒测速仪研究[J].光学学报,1987(8). |
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| 作者姓名： | 史绍熙 王仕康 郭晓明 |
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| 作者单位： | 天津大学热物理工程系
(史绍熙，王仕康)，天津大学热物理工程系(郭晓明) |
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| 摘 要： | 本文介绍一种新型激光多普勒测速仪——光电调制反馈激光多普勒测速仪(简称OEMF-LDA)。该仪器突破了传统LDA系统构成的模式,采用变频光学频移技术和光电混合反馈技术,将光路和电路连接成闭环负反馈跟踪环路,提高了信噪比,降低了成本。文中结合实验,讨论了OEMF-LDA的静态及动态特性,并在系统的结构及性能等方面与传统LDA作了比较。
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| 关 键 词： | 激光多普勒测速仪 |
Investigation of optic-electro-modulation-feedback laser Doppler anemometer |
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| SHI SHAOXI,WANG SHIKANG AND GUO XIAOMING.Investigation of optic-electro-modulation-feedback laser Doppler anemometer[J].Acta Optica Sinica,1987(8). |
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| Authors: | SHI SHAOXI WANG SHIKANG AND GUO XIAOMING |
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| Abstract: | In this paper a new laser doppler anemometer (LDA), optic-electro-moduidtion-feedback LDA (OEMF-LDA), has beed described. In this system the optical components and electronic components are combined in a closed-loop by means of feedback signal which drives two Bragg cells to introduce a changable frequency difference between the two laser beams. The signal-to-noise ratio in this system is much higher than that in a conventional LDA. The frequency response of the OEMF-LDA has been discussed, based on both analysis and experiments. |
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| Keywords: | laser doppler anemometer |
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