STTR Phase II: Hybrid Optical Module with a Narrowband Electro-Optically Tunable Filter

*** 小行星9805388 完成的第一阶段工作的主要目标是证明铌酸锂波导上的高反射率低损耗硅光栅的可行性。 我们从理论上和实验上证明了用高折射率Si覆盖层可以在不增加导模光损耗的情况下实现LiNbO 3波导中有效模折射率的实质扰动。 利用这种现象制作了反射率为80%的高性能Si分布布拉格反射镜。 在此基础上，利用Si光栅在LiNbO 3波导上实现了具有电光调谐能力的窄带非对称法布里-珀罗滤波器。该滤波器在混合激光滤波器模块中进行了测试。 采用Si-on-LiNbO 3结构的高性能DBR光栅的开发技术可用于开发各种先进器件，特别是滤波器和紧凑型波导激光源，如CW、锁模、Q开关和可调谐激光器。 这些器件在电缆和电信行业，特别是在WDM网络中非常需要。 ***

*** 9805388 Tavlykaev The primary goal of the completed Phase I effort was to prove the feasibility of hig-reflectance low-loss silicon gratings on LiNbO3 waveguides. We showed theoretically and demonstrated experimentally that a substantialperturbationof the effective mode index ina LiNbO3 waveguide can be achieved with a high-index Si overlay without increasing optical loss for the guided mode. This phenomenon was used to build a high performance Si Distributed Bragg reflector with 80% reflectivity. Subsequently, a narrowband asymmetric Fabry-Perot filter with electro0optical tunability was realized using a Si grating on a LiNbO3 waveguise. The filter was tested in a hybrid laser-filter module. The developed technology of high performance DBR gratings using Si-on-LiNbO3 structures is useful in developing a variety of advanced devices, in particular, filters and compact waveguide laser sources, such as CW, mode locked, Q-switched, and tunable lasers. These devices are sorely needed inthe cable and telecommunication industry, especially in WDM networks. ***