Modern systems often provide complex functionality that can be realized by tailoring together elements of simpler functionality. Multiplicity of simple optical functions (response shapes), when densely fabricated on a chip, can promote the concept of a field-programmable optical array. Shaping of the frequency response, or otherwise an electrical-to-optical response, is studied and demonstrated by means of a racetrack-shaped ring resonator designed and fabricated in the so-called double injection configuration. This configuration possesses a unique property that allows two free spectral range states (regular, 2 × regular) to exist for a single ring length. Shaping is realized by properly selecting different coupling coefficients that provide a variety of interesting responses. Here, we demonstrate various shapes including: sinusoidal, triangular (linear), square (bandpass), dips and peaks (two states), spikes (tangent-like), interleaver and a so-called 20dB-min parameters-insensitive-response modulator. The transmission responses were experimentally realized, fabricated in a silicon-on-insulator platform and characterized at wavelengths around 1,550 nm.

现代系统通常提供复杂的功能，可以通过将简单功能的元素组合在一起来实现。在芯片上密集制造时，多种简单的光学功能（响应形状）可以促进现场可编程光学阵列的概念。借助于以所谓的双注入配置设计和制造的跑道形环形谐振器，研究并演示了频率响应或电光响应的成形。此配置具有独特的属性，允许在单个环长度上存在两个自由光谱范围状态（常规，2×常规）。整形是通过适当的选择提供了各种有趣的反应不同耦合系数来实现。在这里，我们演示了各种形状，包括：正弦形，三角形（线性），正方形（带通），谷值和谷值（两种状态），尖峰（类似切线），交织器和所谓的20dB-min参数不敏感响应调制器。传输响应是通过实验实现的，是在绝缘体上硅平台上制造的，并具有约1,550 nm的波长。