目前有许多检测仪器,利用激光通过被测气体时光强的变化,获得被测气体的一些物理量。如果激光管本身输出光强不稳定,涨落较大时,会给准确测试带来困难。解决这个问题的途径之一,是提高激光器输出功率的时间稳定性。我们则立足于现有激光器件的水平,从电子线路上解决了这个问题。原理如图1所示。数放大器的动态范围为三个数量级,运用集成运放5G23C 是足够了。 There are many detection instruments, the use of laser through the measured gas intensity changes, get the measured gas some physical quantities. If the output of the laser tube itself is not stable, a large fluctuation will give accurate testing difficulties. One of the ways to solve this problem is to improve the time stability of laser output power. We are based on the existing level of laser devices, from the electronic circuit to solve this problem. The principle is shown in Figure 1. The amplifier’s dynamic range is three orders of magnitude, using the integrated op amp 5G23C is sufficient.