Linear and Nonlinear Guided Wave Optical Devices Based on a Rigorous Theory for Intersecting Waveguides

交叉波导是用于集成电路的自然波导元件。 光学. 作为无源元件，它们可以用作光学交叉， 在集成光路中的器件之间连接。 的 几何形状可以用作广播电路的功率分配器。 的 更大的兴趣在于其作为光交叉点开关的潜力。 不幸的是，目前的理论分析已经能够解释 只有最微不足道的实验观察。 响应于 本文发展了一种基于多次散射的严格解析方法 在波导之间。 理论分析将扩展到检查光学相交 结合了电光和更高阶的波导器件 非线性效应 电光装置将包括开关， 开关阵列、调制器和可调谐波长滤波器。 的 分析之后将设计和制造这些器件 在LiNbO3. 相交的波导几何形状也应该是理想的， 制作导波全光非线性器件，包括 开关和光耦合器件。 的可行性 将所述相交波导结构并入到具有 将检查合理的三阶非线性。 是我们 为了将这些结果结合到导波装置中， 使用半导体超晶格材料或 光折变化合物 我们的导模和辐射模耦合结果的集成 一个单一的耦合模理论将被追求。 这将使 同时考虑辐射损耗和导波 交叉波导分析与设计中的一个现象 装置.

Intersecting waveguides are a natural waveguide element for integrated optics. As a passive element, they can be used as optical cross- connects between devices in an integrated optical circuit. The geometry can serve as a power splitter for broadcast circuits. Of greater interest is its potential as an optical crosspoint switch. Unfortunately, current theoretical analysis has been able to explain only the most trivial of experimental observations. In response to this develop a rigorous analytic method based on multiple scattering between waveguides. Theoretical analysis will be extended to examine optical intersecting waveguide devices incorporating the electro-optic and higher order nonlinear effects. Electro-optic devices will include switches, switch arrays, modulators, and tunable wavelength filters. The analysis will be followed by design and fabrication of these devices in LiNbo3. The intersecting waveguide geometry should also be ideal for fabricating guided wave all-optical non linear devices, including switches and optically bistable devices. The feasibility of incorporating the intersecting waveguide structure into a medium with reasonable third order nonlinearity will be examined. It is our intention to incorporate these results into a guided wave device, using as a substrate either semiconductor superlattice material or photorefractive compounds. Integration of our guided mode and radiation mode coupling results into a single coupled-mode theory will be pursued. This would permit simultaneously taking into account radiation loss and guided wave phenomenon in the analysis and design of intersecting waveguide devices.