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纳秒级脉冲激光自动跟踪积分式测量方法
Auto tracking integral mode measuring method for nanosecond pulsed laser
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摘要: 介绍了一种纳秒级脉冲激光光斑能量分布测量电路的设计方法，采用自动跟踪积分方式，根据预测先将脉冲光电流积分并保存，然后用速度较低的 A／D 芯片进行 A／D 转换，该方法避免了采用高速 A／D芯片，且可以获得较高的采样分辨率，特别是在需要采集的通道数较多时具有明显优势。
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关键词:
- 脉冲激光 /
- 光斑分布参数 /
- 脉冲激光能量分布测量 /
- 自动跟踪积分 /
- 光电流积分
Abstract: An optical beam energy distribution measuring method for nanosecond pulse laser is discussed.A kind of auto tracking integral mode is adopted for the method.By using forecast circuit,the pulse photocurrent is accumulated and held.The integral photocurrent is sampled by a low speed A/D converter.Thus,a high sampling rate can be got.The method is used suc-cessfully for a laser array target for testing high power energy beam distribution,and fit for testing the pulse laser with frequency from 5 Hz to 1 kHz,pulse width from 10 ns to 200 ns. -
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