title: Continuously tunable devices based on electrical control of dual-frequency liquid crystal filled photonic bandgap fibers.
abstract: We present an electrically controlled photonic bandgap fiber device obtained by infiltrating the air holes of a photonic crystal fiber (PCF) with a dual-frequency liquid crystal (LC) with pre-tilted molecules. Compared to previously demonstrated devices of this kind, the main new feature of this one is its continuous tunability due to the fact that the used LC does not exhibit reverse tilt domain defects and threshold effects. Furthermore, the dual-frequency features of the LC enables electrical control of the spectral position of the bandgaps towards both shorter and longer wavelengths in the same device. We investigate the dynamics of this device and demonstrate a birefringence controller based on this principle.
authors.forename: Lara
authors.initials: L
authors.lastname: Scolari
authors.forename: Thomas
authors.initials: T
authors.lastname: Alkeskjold
authors.forename: Jesper
authors.initials: J
authors.lastname: Riishede
authors.forename: Anders
authors.initials: A
authors.lastname: Bjarklev
authors.forename: David
authors.initials: D
authors.lastname: Hermann
authors.forename: Anawati
authors.initials: A
authors.lastname: Anawati
authors.forename: Martin
authors.initials: M
authors.lastname: Nielsen
authors.forename: Paolo
authors.initials: P
authors.lastname: Bassi