介绍了一种基于液晶电控双折射效应的可调光衰减器,通过理论计算和实验研究对其光强调节性能,特别是调节的动态范围进行了分析。结果表明,这种可调激光衰减器控制电压低、动态范围大、调节精度高;通过选择合适的控制电压区间,可以在宽波段范围内实现对任意波长激光的光强连续调节,因此在光纤通信、光电检测等领域具有广泛的应用前景。

A variable optical attenuator (VOA) based on electro-optic effect of liquid crystal is described. The performance on the emphasis of the dynamic range is analyzed through theoretical and experimental research on it. The results show that the variable optical attenuator has low control voltage and broad dynamic range of continuous adjustment in wide spectrum coverage with high precision. The operating wavelength can be switched to any wavelength by appropriately selecting the control voltage interval. This device has potential applications in the fields of optic communications,photoelectric tests and so on.