赝态结构多模干涉波分复用器的研究

Quasi-state Multimode Interference Wavelength Division Multiplexer

为了减小波分复用器的器件长度,在聚酰亚胺材料的基础上,设计了一种赝态结构的2×2多模干涉波分复用器,并用精确导模分析法对其进行模拟分析和优化设计。结果表明,赝态结构波分复用器可以有效地对980 nm和1 550 nm光进行解复用,而器件尺寸只有传统设计的1/5;且器件在器件长度和波长变动中显示出良好的容差性,能够与掺铒放大器和激光器实现集成。其中,赝态结构多模干涉聚酰亚胺波分复用器的干涉区宽度和长度以及输入口宽度和距离对其性能均有影响。

To shorten the device length, a 2 × 2 multi-mode interference multiplexer/demultiplexer with a quasi-state structure is designed on fluorinated polyimide. The device is analyzed by explicated modal propagation analysis. The results show the device can demultiplexer the 980 nm and 1 550 nm with the reduced length of normal designed device by a factor of 5. Moreover,the device has high tolerance on the device length and wavelength variations, and can integrate with erbium doped amplifiers and lasers. Certainly, the both width and length of quasistate MMI polyimide WDM in the interference region and the width and distance of output ports will influence the device performances.