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., χ<sup>(2)</sup> gratings, from the submicrometer to the millimeter range.
© 2000 Optical Society of America
Okihiro Sugihara, Makoto Nakanishi, Yanlong Che, Chikara Egami, Yoshimasa Kawata, and Naomichi Okamoto, "Single-pulse ultraviolet laser recording of periodically poled structures in polymer thin films," Appl. Opt. 39, 5632-5637 (2000)