A kind of polymer poly(disilanylene 2,2′ bipyridine 5,5′ diyl)ruthenium (PDSBpy Ru) with a σ π alternating conjugated backbone was synthesized. The photorefractive effects were investigated by two beam coupling (2BC), degenerated four wave mixing (DFWM) and field induced orientation birefringence at 532 nm. This polymer shows an enhanced photoinduced metal to ligand charge transfer (MLCT) inside the ruthenium complex. The coupling coefficient and the diffraction efficiency are measured to be about 30 cm -1 and 10%, respectively.