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Fully functionalized photorefractive polymers have attracted much attention in recent years.While the synthesis of chromophore-containing functionalized monomers is not a trivial task,and the polymerization of functionalized monomer normally gives a low molecular weight owing to both the monomer bulkiness and the side effect of functional group on polymerization,which is not beneficial to the film-forming property.Recent development on ring-opening metathesis polymerization(ROMP)of cyclic olefinic derivatives provides an excellent approach,especially the ROMP of norbornene functional monomers.