Noncollinearly Phase-Matched Second Harmonic Generation in Stilbene-Dye-Attached Polymer Thin Films

Abstract

Noncollinearly phase-matched second harmonic generation (SHG) of Nd:YAG-laser light (1.064 µm) has been measured in a thin-film waveguide of stilbene-dye substituted methacrylate polymer on a glass substrate. The second-order nonlinear optical coefficient d ₃₃ of the corona-poled film is 1.6×10^-8 esu (at 1.064 µm). The phase-matching crossing angle of two guided fundamental beams is about 3.6° in the 1.38±0.02 µm-thick polymer waveguide. The SHG efficiency has been estimated to be about 5×10^-5% for the fundamental peak power of about 130 W. The broad angular dependence of SH power has resulted from the short interaction length (0.1∼1 mm order) of two fundamental beams.