STABLE HIGHLY TRANSPARENT NONLINEAR-OPTICAL POLYMER FOR LASER FREQUENCY-DOUBLING

Channel waveguides of a polymer with nonlinear optical properties and transparency down to 400 nm were fabricated to be used for laser frequ ency doubling. The polymer was corona poled to induce orientation of t he nonlinear chromophores, resulting in a stable poled polymer. End-fi re coupling was used to couple the fundamental beam into the polymer c hannel waveguide. Green light was observed in the form of Cerenkov rad iation using a Q-switched Nd-YAG laser lasing at 1064 nm as the fundam ental beam. The total efficiency of the second harmonic conversion was 1.4 x 10(-3) %/W.