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提出一种可同时支持横电模和横磁模传输的微环光开关设计方法,可用于构建波长平面内的偏振无关交换芯片.为了实现微环光开关的偏振无关传输,横电模和横磁模应工作在同一谐振波长且在该波长处有相同的群折射率,据此采用MODE Solutions优化基于硅绝缘体波导结构的微环参数,建立Interconnect芯片仿真模型,考察微环光开关芯片的透射特性和传输特性.经过优化设计,微环光开关的偏振相关损耗低至0.13dB,光脉冲传输时延为42.5ps.研究表明,当微环长度偏离优化值约5nm时,偏振相关损耗就会增加到1dB,其中热光效应可以用来弥补工艺偏差,温度每变化1 K,则可弥补2.2nm的环长偏差.
A micro-ring optical switch design method capable of supporting both transverse and transverse magnetic mode transmission is proposed, which can be used to build a polarization-independent switching chip in the wavelength plane. In order to realize the polarization-independent transmission of the micro-ring optical switch, The magnetic mode should work at the same resonant wavelength and have the same group refractive index at that wavelength. Therefore, MODE Solutions is used to optimize the micro-ring parameters based on the silicon-insulator waveguide structure. The Interconnect chip simulation model is established to investigate the transmission of the microring optical switch chip Characteristics and transmission characteristics.After optimization design, micro-ring optical switch polarization-dependent loss as low as 0.13dB, optical pulse transmission delay of 42.5ps.Research shows that when the micro-ring length deviation from the optimal value of about 5nm, the polarization-dependent loss will be Increase to 1dB, among them thermo-optic effect can be used to make up for the craft deviation, every change of temperature 1 K, can make up for 2.2nm ring length deviation.