A beam of high radiant power will have high divergence. 高辐射功率的光束会有高的发散度。
Because the beam formed by a tapered coupler is produced by many rays that emerge at slightly different angles, the outgoing beam is characterized by a relatively large divergence. 因为尖劈耦合器形成的光束是由许多出射角稍有不同的光线组成的，放出射光束的特点是具有较大的发散度。
