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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.
The resonant cavity has a wide range of applications in the field of integrated optics due to its frequency selective function. By coupling two photonic crystal circular cavities, four different sizes of photonic crystal microcavities and waveguides, 1310 nm, 1550 nm, 1600 nm and 1650 nm.The results of finite-difference time-domain simulation show that the output efficiency of all four wavelengths can reach more than 90% only by modulating the radius of the dielectric column at the edge of the output waveguide The designed device has high efficiency and small size (about 12μm × 17μm), which has potential application in the field of optical communication in the future.