In the present invention, a multilayer stack of alternating layers of a metal and a dielectric is deposited directly onto the surface of an optical fiber that has been processed to remove the cladding from one side of the fiber. The multilayer metal-dielectric structure is constructed to give high birefringence...http://www.google.es/patents/US4795233?utm_source=gb-gplus-sharePatente US4795233 - Fiber optic polarizer
