study on nonblocking wavelength switch using microring resonators

基于微环谐振器的无阻塞波长开关研究

基本信息

批准号：
16360031
负责人：
KOKUBUN Yasuo
金额：
$ 9.79万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

Tunable Add/Drop filter is a key device for flexible and scalable routing using wavelength label. However, the conventional tunable filter blocks other wavelength channels during the tuning of resonant wavelength. Thus we proposed a nonblocking wavelength selective switch (WSS) by controlling individually resonant wavelengths of double series coupled microring resonator. The switch is based on the operational principle that in the double series coupled microring resonator the drop port output at a specific resonant wavelength is obtained in simultaneous resonance of both ring resonators and is not obtained when resonant wavelengths of two ring resonators are not matched. In this research, we are aiming at realizing the nonblocking wavelength selective switch based on this principle.In the fiscal year of 2004, we demonstrated a nonblocking wavelength selective switch using polymer material, because polymer materials have large thermo-optic coefficient and can realize a wide tuning range. However, the reproducibility of resonant wavelength (0.16nm) and the response time (2ms) were not satisfactorily good. Thus in the fiscal year of 2005, we fabricated a nonblocking WSS using Ta_2O_5-SiO_2 dielectric material as core and SiO_2 as cladding. As the result, the response time was extremely improved to 15μs, which is hundred-fold improvement compared with the polymer device, and the reproducibility of resonant wavelength was also improved to less than 0.01nm. However, since the thermo-optic coefficient of dielectric material is one-tenth smaller than that of polymer materials, the tuning range was only 2.3nm. Therefore, we introduced the Vernier effect owing to two different ring radii and successfully improved the tuning range to 23nm, and also demonstrated the dual-directional wavelength switching to both longer wavelength side and shorter wavelength side.

可调谐分插滤波器是使用波长标签进行灵活和可扩展路由的关键器件，但是，传统的可调谐滤波器在调谐谐振波长期间会阻塞其他波长通道，因此我们提出了一种通过控制单独谐振的非阻塞波长选择开关（WSS）。双串联耦合微环谐振器的工作原理是，在双串联耦合微环谐振器中，在两个环形谐振器同时谐振时获得特定谐振波长的分接端口输出。当两个环形谐振器的谐振波长不匹配时，就无法获得。在本研究中，我们的目标是实现基于该原理的无阻塞波长选择开关。在2004财年，我们展示了使用聚合物材料的无阻塞波长选择开关。，由于聚合物材料具有较大的热光系数，可以实现较宽的调谐范围，但谐振波长（0.16nm）和响应时间（2ms）的再现性并不理想。于是在2005财年，我们制作了一种以Ta_2O_5-SiO_2介电材料为核心、SiO_2为包层的无阻塞WSS，其响应时间极大地提高到了15μs，与聚合物器件相比提高了百倍。，并且谐振波长的再现性也提高到小于0.01nm，但是，由于介电材料的热光系数是。比聚合物材料小十分之一，调谐范围仅为2.3nm，因此，我们引入了两种不同环半径的游标效应，成功地将调谐范围提高到23nm，并演示了双向波长切换。长波长侧和短波长侧。