| 激光水下目标探测系统中的PMT变增益控制 |
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| 引用本文： | 卢益民,张峰.激光水下目标探测系统中的PMT变增益控制[J].激光技术,1995,19(4):222-226. |
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| 作者姓名： | 卢益民 张峰 |
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| 作者单位： | 1.武汉华中理工大学电信系, 武汉, 430074 |
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| 摘 要： | 文中讨论了激光在海水中的传播特性,指出激光水下目标探测系统所接收到的目标反射回波是一种叠加在后向散射上的微弱光信号,它们的能量是随深度呈指数规律衰减的,且动态范围很大(可达105).为处理这种大动态范围的弱光信号,文中研究了PMT的增益变化特性,设计出了一种实用的PMT变增益控制系统,该系统的控制范围可达104,并已在一种激光水下目标探测实验系统中得到应用。
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| 关 键 词： | 激光 水下目标 探测系统 PMT 增益控制 |
PMT gain control in underwater laser object detection system |
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| Lu Yimin,Zhang Feng,Chen Wenge.PMT gain control in underwater laser object detection system[J].Laser Technology,1995,19(4):222-226. |
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| Authors: | Lu Yimin Zhang Feng Chen Wenge |
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| Abstract: | Based on the disscusing of laser propagation properties in sea,this paper points out that the recieved energy consists of sea-water backscatter and object reflection,and the later is quite weak,and has a large dynamic range of 105.So,it is necessary to have a gain control system of photomultiplier tube (PMT)to compensate the signal variation.This paper introduces a practical photo-multiplier gain control(PMGC)system,the system has beter dynamic range of 104 and has been used in a un-derwater object laser detection system. |
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| Keywords: | laser underwater object detection system PMT gain control |
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