Phased-Based Second-Order Nonlinear Optics For Optical Processing

9320308 Stegeman提出了一个广泛的研究计划。1)从实验和理论上建立级联的基本物理；2)制作适合实现级联效应的波导；3)研究光晶体管所需的全光特性，如波导中的调制、增益等；4)研究波导级联全光开关。实验程序将在体介质和波导中实现。级联相互作用将首先在体晶体中使用高斯光束进行研究，以建立基础科学。将使用标准的二阶晶体，并需要高功率激光器（我们有）。同时，我们的极化聚合物波导技术将向相位匹配SHG方向发展。然后，使用这种波导，我们将研究低功耗级联操作，朝着光学晶体管的方向努力。PI希望在三年后，他们能够评估级联方法是否适用于一般的信号处理，特别是光学晶体管。＊＊＊

9320308 Stegeman A broad research program is proposed. 1) Establish experimentally and theoretically the basic physics of cascading; 2) Fabricate waveguides suitable for implementing cascading effects; 3) Investigate all-optical features needed for an optical transistor such as modulation, gain etc. in waveguides; 4) Investigate all- optical switching using cascading in waveguides. The experimental program will be implemented in both bulk media and waveguides. Cascading interactions will first be studied in bulk crystals using Gaussian beams to establish the basic science. Standard second order crystals will be used and will require high power lasers (which we have). In parallel our poled polymer waveguide technology will be developed towards phase-matched SHG. Then, using such waveguides we will investigate low power cascading operations, working towards an optical transistor. The PI's expect that after three years they should be able to assess whether the cascading approach is useful for signal processing in general, and an optical transistor in particular. ***