通过使用光耦衰减器的串联和分流相结合可以配置成恒定的输入和输出阻抗，而与控制电压无关。

By using a series and shunt combination of optocouplers the attenuator can be configured to produces a constant input and output impedance, regardless of where the voltage control setting is.

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实验结果表明，它可将激光输出功率起伏由60%左右降到5%以下，并且此装置可作为线性很好的光衰减器。

Experimental results show that it can reduce the fluctuation of laser output from about 60% to 5%, and it can also be used as a linear laser attenuator with good performance.

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RF输出信号幅度节制利用半导体衰减器，存在高靠得住性。

RF outputs signal extent to control use semiconductor attenuator, have high reliability.

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