Sugihara O, Nakanishi M, Che Y, Egami C, Kawata Y, Okamoto N
Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu 432-8561, Japan.
Appl Opt. 2000 Oct 20;39(30):5632-7. doi: 10.1364/ao.39.005632.
A simple fabrication technique for nonlinear polymeric optical waveguide patterns is introduced based on the two-beam interference method. We determined that the second-order nonlinearity of poled polymer films is erased by single-pulse ultraviolet (UV) laser irradiation. The erasure mechanism for second-order nonlinearity is discussed. To form a periodic structure in an optical polymer waveguide, two types of optical configuration of two-beam interference were arranged, and a single-pulse UV laser was exposed directly onto poled films. We prove that this method provides a simple way to fabricate volume-type and ridge-type periodically poled structures, i.e., chi(2) gratings, from the submicrometer to the millimeter range.
介绍了一种基于双光束干涉法的非线性聚合物光波导图案的简单制造技术。我们确定，单脉冲紫外激光辐照会消除极化聚合物薄膜的二阶非线性。讨论了二阶非线性的消除机制。为了在光学聚合物波导中形成周期性结构，设置了两种双光束干涉的光学配置，并将单脉冲紫外激光直接照射到极化薄膜上。我们证明，该方法提供了一种从亚微米到毫米范围制造体积型和脊型周期性极化结构（即χ(2)光栅）的简单方法。
