SOI波导反射模式的古斯-汉欣空间位移效应及其数字式热光开关

借助波导转角镜结构,利用古斯-汉欣空间位移和热光效应折射率调制的有效组合,提出了波导反射模式数字式热光开关结构.在给定入射角的条件下优化了空间古斯-汉欣位移,在具有古斯-汉欣效应的本征态下,反射光束出现了较大的跳跃.在1.0μm厚硅膜的绝缘体上硅平台上,单模输入波导和多模干涉波导结构之间的导模本征态匹配,验证了1×3数...

Digital Thermo-optic Switch of SOI Waveguide Based on Goos-Hanchen Spatial Shift of Reflected Mode

With the waveguide corner mirror structure and the effective combination of the Goos-Hanchen(GH)spatial shift and the thermo-optical effect refractive index modulation,a digital thermo-optical switch structure of waveguide reflected mode is proposed.The GH spatial shift is optimized under the condition of a given incident angle,and the reflected beam has a larger jump under an eigenstate with the GH effect.On a silicon-on-insulator platform with a 1.0μm thick silicon film,the guided mode eigenstate matching between the single-mode input waveguide and the multimode interference waveguide structure verifies the function of a 1×3 digital optical switch.In experiment,the optical loss caused by the device structure is 0.3 dB,the switching power is 130~150 mW,the switching time is about 50μs,and the isolation between adjacent output ports is 15 dB.The comparison with the latest results of the MachZehnder interferometer 2×2 thermo-optic switch and the newly emerging plasma effect thermo-optic switch shows the advancement of this digital TO switch.