title: Ultrahigh-birefringent squeezed lattice photonic crystal fiber with rotated elliptical air holes.
abstract: We report an experimental realization of a highly birefringent photonic crystal fiber as a result of compressing a regular hexagonal structure. The experimental measurements estimate a group birefringence of approximately 5.5x10(-3) at 1550 nm in good agreement with the numerical results. We study the influence of compressing the regular structure at different directions and magnifications, obtaining a method to realistically enhance the phase birefringence while moderating the group birefringence.
authors.affiliation: Departamento de Optica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain.
authors.forename: Felipe
authors.initials: F
authors.lastname: Beltrán-Mejía
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Chesini
authors.forename: Enrique
authors.initials: E
authors.lastname: Silvestre
authors.forename: Alan K
authors.initials: AK
authors.lastname: George
authors.forename: J C
authors.initials: JC
authors.lastname: Knight
authors.forename: Cristiano M B
authors.initials: CM
authors.lastname: Cordeiro