Hill K O
Appl Opt. 1974 Aug 1;13(8):1853-6. doi: 10.1364/AO.13.001853.
Aperiodic distributed-parameter waveguides are considered for use as reflectors and filters in integrated optics. Coupled-mode theory is used to predict the effects on modal propagation of aperiodic perturbations induced in a slab waveguide. In particular, it is shown that aperiodic perturbations can couple forward-traveling bound modes to backward-traveling bound modes; and that the frequency dependence of such a coupling process can be controlled through the aperiodicity. It is suggested that aperiodic coupling may be used to realize optical-waveguide reflectors and filters having predetermined spectral-response characteristics. As examples, the spectral-response characteristics of a narrow band-stop filter, a broadband-stop filter, and a narrow band-pass filter are calculated and presented.
非周期分布参数波导被考虑用作集成光学中的反射器和滤波器。耦合模理论用于预测平板波导中引入的非周期微扰对模式传播的影响。特别地，结果表明非周期微扰可以将正向传播的束缚模耦合到反向传播的束缚模；并且这种耦合过程的频率依赖性可以通过非周期性来控制。有人提出非周期耦合可用于实现具有预定光谱响应特性的光波导反射器和滤波器。作为示例，计算并给出了窄带阻滤波器、宽带阻滤波器和窄带通滤波器的光谱响应特性。
