First demonstration of thermally poled electrooptically tunable fiber Bragg gratings

We demonstrate electrooptic tuning of a fiber Bragg grating (FBG) fabricated in a thermally poled fiber. 40 pm of tuning was demonstrated, corresponding to an electrooptic coefficient of 0.25 pm/V. Such electrooptic tunable FBG's have strong potential for numerous devices, including all-fiber amplitude modulators and high-speed tunable filters.