EDFA的出现有效地降低了长途DWDM网络传输的成本,使光通信进入一个辉煌的时代。但它是分立元件,长期以来,实现硅基的光电子集成一直是人们不懈追求的目标。现在,人们已利用硅基光波导技术制作了Wach-Zeder干涉仪、热光开关阵列、分光器、窄带滤波器和方向耦合器等分立的 The emergence of EDFA effectively reduces the cost of long-haul DWDM network transmission, optical communications into a brilliant era. However, it is a discrete component. For a long time, the realization of silicon-based optoelectronics has always been the goal pursued by people. Silicon-based optical waveguide technology has now been used to make Wach-Zeder interferometers, thermo-optic switch arrays, beam splitters, narrow band filters, and directional couplers