Electrically driven motion of micro-fluids in air-silica microstructure fiber: application to tunable filter/attenuator

In conclusion, we demonstrate that positioning of fluids along micro-capillary channels inside the fiber enables the manipulation of light at narrow or large bandwidths. This approach uses low voltages, and can be applied to different fluids. In addition, it has the potential for changing the modal properties of light in fibers in a way that cannot be achieved in other conventional fibers. The motion (magnitude and direction) of the fluid is controlled the amount of pressure or heat delivered by capillary heaters.