报道了用氦氖激光实现的塑料光纤双锥与介质半球 (称半球腔 )之间的活动耦合效应。测量了光纤双锥的发射效率 ,并测量了锥腔耦合效率与半球腔的表面积、锥腔距离之间的关系。根据这种效应 ,可以制成塑料光纤活动耦合器 ;如果再加上调谐滤波器 ,可制成适合塑料光纤通信网用的信号上下载装置 The coupling effect between plastic double cone and the hemisphere of the media (called hemispherical cavity) realized by He-Ne laser is reported. The emission efficiency of the fiber double cone was measured and the relationship between the coupling efficiency of the cone cavity and the surface area of ​​the hemispherical cavity and the distance of the cone cavity was measured. According to this effect, can be made of plastic optical fiber coupler; if coupled with the tuning filter can be made for plastic optical fiber communication network with the signal on the download device