We demonstrate a liquid crystal photonic bandgap fiber based polarizer integrated in a double silicon v-groove assembly. The polarizer axis can be electrically controlled as well as switched on and off.
Alkeskjold, T. T., & Bjarklev, A. O. (2007). Electrically controlled broadband liquid crystal photonic bandgap fiber polarimeter. Optics Letters, 32(12), 1707-1709. https://doi.org/10.1364/OL.32.001707