18 December 2002 Optical properties of a nonlinear p-phenylenevinylene oligomer side chain polymer in films and fiber preforms
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Linear and nonlinear optical properties of a new soluble polymer bearing distyrylbenzene chromophore, the alkoxy-sulphono-substituted p-phenylenevinylene oligomer (MTPV-ORSO) attached as a side-chain to the methyl methacrylate backbone are reported. This chromophore was developed for introduction into single-mode nonlinear optical polymer fibres. The molecular second-order and third-order nonlinearities were estimated with quantum chemical calculations (MOPAC). The side-chain polymer shows an optical absorption maximum at 326 nm. The polymer was incorporated into the core of the fibre preform with a procedure which led to a step index profile, as measured with a preform profiler, suitable for a single-mode optical fibre. Second harmonic of the fundamental 1200 nm wave was measured in the corona poled polymer films giving the second-order susceptibility d33 = 0.8 pm/V for the polymer containing about 1.3 wt% of the side-chain chromophore and 0.1 pm/V in a guest-host system containing 0.24 wt% of the chromophore in the fibre preform. The coherence length of the side-chain polymer, equal to 28 μm at 1200 nm, was evaluated from the dispersion of the linear refractive indices. Degenerate four-wave mixing (DFWM) with amplified femtosecond pulses was also applied to measure the nonlinear refractive index of the co-polymer at 800 nm.
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Anna Samoc, Anna Samoc, Barry Luther-Davies, Barry Luther-Davies, Marek Samoc, Marek Samoc, Man Shing Wong, Man Shing Wong, R. Maryla Krolikowska, R. Maryla Krolikowska, Therese M. Martin, Therese M. Martin, Craig J. MacLeod, Craig J. MacLeod, Anke C. Freydank, Anke C. Freydank, Gang-Ding Peng, Gang-Ding Peng, Trevor Whitbread, Trevor Whitbread, "Optical properties of a nonlinear p-phenylenevinylene oligomer side chain polymer in films and fiber preforms", Proc. SPIE 4798, Linear and Nonlinear Optics of Organic Materials II, (18 December 2002); doi: 10.1117/12.452120; https://doi.org/10.1117/12.452120

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