因此无论是从目前干线网的需求，还是从长远的光纤到户的要求上来看，都需要探索、研究出性能优良，价格低廉的高速电光调制器。

Therefore, it is necessary to develop a kind of high-speed electro-optical modulator with low cost but good performance so as to meet the current need of route network and the future need of the FTTH.