中文摘要：

谐振腔因其具有选频功能而在集成光学领域具有广泛的应用.通过两个光子晶体环形腔、四个不同尺寸的光子晶体微腔及波导之间的耦合,实现了1310 nm,1550 nm,1600 nm和1650 nm四个波长的波分解复用.时域有限差分法模拟分析的结果表明,仅仅通过调制输出波导边缘介质柱的半径,即可使四个波长的输出效率均达到90%以上.所设计的器件不但效率高,而且尺寸小（约为12μm×17μm）,在未来的光通信领域中具有潜在的应用价值.

英文摘要：

Resonant cavities are used widely in the field of integrated optics due to their excellent frequency-selective properties. Based on the characteristics of resonant coupling between two photonic crystal ring resonators, four cavities with different sizes and waveguides, the demultiplexing of four wavelengths, i.e. 1310 nm, 1550 nm, 1600 nm and 1650 nm is realized. The numerical results obtained by the finite-difference time-domain method show that the output efficiency of the four wavelengths can be higher than 90% only by modulating the radii of the border rods of output waveguides. The presented device that has not only a compact size with 12 μm×17μm but also a high output efficiency, may have potential application in the future optical communication field.