Sunitha, M.S.Adhikari, A.V.Vishnumurthy, K.A.Safakath, K.Philip, R.2020-03-312020-03-312012International Journal of Polymeric Materials and Polymeric Biomaterials, 2012, Vol.61, 7, pp.483-504https://idr.nitk.ac.in/handle/123456789/11863We present the synthesis of two newly designed, thiophene-based conjugated polymers (P1 and P2) carrying 1,3,4-oxadiazole, 3,4-dinaphthyloxy thiophene, and 3,4-dialkoxy thiophene moieties as potential NLO active materials. Their NLO properties have been investigated both by the Z-scan and degenerate four-wave mixing (DFWM) techniques using 532nm, 7 nanosecond laser pulses. The measured ? and ?(3) values for the polymers are found to be in the range of 1011m/W and 1011esu, respectively. The results indicate that they exhibit good optical-limiting behavior and are promising materials for nonlinear optical applications due to effective two-photon absorption (TPA). 2012 Copyright Taylor and Francis Group, LLC.Article