提出了一种新的谐振腔增强型 (RCE)光探测器结构 ,它将器件结构中的谐振腔分为三个子腔。分析表明 ,采用这种新结构的光探测器在保留了 RCE光探测器优点的同时 ,还实现了器件量子效率及其光谱响应线宽之间制约关系的解耦 ,因而可以同时获得窄的光谱响应线宽 (<1 nm) ,高的量子效率 (>90 % )和高的响应速度。该器件可望在密集波分复用 (DWDM)光通信系统中得到广泛应用 A new resonator-enhanced (RCE) photodetector structure is proposed, which divides the resonator in the device structure into three sub-cavities. The analysis shows that the photodetector with this new structure retains the advantages of the RCE photodetector while still achieving the decoupling of the quantum efficiency of the device and its spectral response linewidth so that a narrow spectrum Response linewidth (<1 nm), high quantum efficiency (> 90%) and high response speed. The device is expected to be widely used in dense wavelength division multiplexing (DWDM) optical communication systems