这是一篇基础知识的文章,作者用详图和推荐的元件说明如何自制用于纤维光学试验间测量的低成本可变衰减器。仔细观看作者的讲述和对准程序,就可以实现下述指标:衰减隔为0～25dB,按光功率计算的精密度为±5%(±0.2dB),以及整个可调范围的准确度为±15%(±0.6dB) This is a basic article in which the author uses detailed drawings and recommended components to explain how to make a low-cost variable attenuator for fiber-optic inter-test measurements. A closer look at the author’s narration and alignment procedures will result in the following metrics: Attenuation 0 to 25 dB, ± 5% (± 0.2 dB) by optical power, and accuracy over the entire adjustable range ± 15% (± 0.6dB)