The University of Texas at Austin, Austin, Texas 78758, USA.
Opt Lett. 2012 Jan 15;37(2):232-4. doi: 10.1364/OL.37.000232.
We experimentally demonstrate highly efficient coupling into a slow light slotted photonic crystal waveguide. With optical mode converters and group index tapers that provide good optical mode matching and impedance matching, a nearly flat transmission over the entire guided mode spectrum of 68.8 nm range with 2.4 dB minimum insertion loss is demonstrated. Measurements also show up to 20 dB baseline enhancement and 30 dB enhancement in the slow light region, indicating that it is possible to design highly efficient and compact devices that benefit from the slow light enhancement without increasing the coupling loss.
我们通过实验演示了高效的耦合到慢光槽型光子晶体波导中。通过光学模式转换器和群折射率渐变器，实现了良好的光学模式匹配和阻抗匹配，在整个导模光谱范围内（68.8nm 范围）实现了近平坦传输，最小插入损耗为 2.4dB。测量结果还显示，在慢光区域的基线增强高达 20dB，增强达 30dB，这表明可以设计出高效、紧凑的器件，利用慢光增强而不增加耦合损耗。
