Push–pull azobenzene compounds were synthesized by the diazocoupling reaction, and low-power phase conjugation of azobenzene-compound-doped poly(methyl methacrylate) films was studied with a He–Ne laser at 632.8 nm. It is shown that this kind of polymer has appreciable third-order optical nonlinearity, with a χ(3) of approximately 10−4 esu in the tail of absorption.
© 1995 Optical Society of America
Haosheng Fei, Zhenqian Wei, Qiguang Yang, Yanlong Che, Yuquan Shen, Xingfa Fu, and Ling Qiu, "Low-power phase conjugation in push–pull azobenzene compounds," Opt. Lett. 20, 1518-1520 (1995)