Wide spectral bandwidth electro-absorption modulator using coupled micro-cavity with asymmetric tandem quantum well.
Wide spectral bandwidth electro-absorption modulator using coupled micro-cavity with asymmetric tandem quantum well.
复制标题
使用具有不对称串联量子阱的耦合微腔的宽光谱带宽电吸收调制器。
作者：
B. H. Na;G. Ju;Hee Ju Choi;Yong;Y. Park;C. Park;Y. T. Lee
对于可靠的三维（3D）成像系统，需要光学快门具有宽光谱带宽操作和增强的调制深度。提出了一种基于耦合法布里-珀罗腔与微腔（CCMC）的电吸收调制器（EAM），该调制器利用非对称串联量子威尔斯阱（ATQWs）来提高光谱带宽和调制深度。研究了几种调制器设计，以获得更宽的频谱带宽和增强的调制深度等改善的调制性能。结果表明，在所研究的调制器结构中，具有ATQW结构的CCMC结构具有最宽的光谱带宽（9.6nm）和在-24V下超过50%的调制深度，这与理论计算结果吻合较好。这些结果表明，EAM具有良好的潜力，作为光学快门的三维成像应用。
For reliable three dimensional (3D) imaging system, it is necessary for the optical shutter to have a wide spectral bandwidth operation and enhanced modulation depth. We propose an electro-absorption modulator (EAM) based on coupled Fabry-Perot cavities with micro-cavity (CCMC) which uses asymmetric tandem quantum wells (ATQWs) to obtain improved spectral bandwidth and enhanced modulation depth. Several modulator designs are investigated to obtain improved modulation performance such as wider spectral bandwidth and enhanced modulation depth. It was found that among all the studied modulator geometries, CCMC structure with ATQWs provides the widest spectral bandwidth of 9.6nm and high modulation depth in excess of 50% at -24V, which is good agreement with theoretical calculations. These results suggest that EAM has excellent potential as optical shutter for 3D imaging application.