title: Multimode Brillouin spectrum in a long tapered birefringent photonic crystal fiber.
abstract: We investigate the stimulated Brillouin scattering (SBS) in a long tapered birefringent solid-core photonic crystal fiber (PCF) and compare our results with a similar but untapered PCF. It is shown that the taper generates a broadband and multipeaked Brillouin spectrum, while significantly increasing the threshold power. Furthermore, we observe that the strong fiber birefringence gives rise to a frequency shift of the Brillouin spectrum which increases along the fiber. Numerical simulations are also presented to account for the taper effect and the birefringence. Our findings open a new means to control or inhibit the SBS by tapering photonic crystal fibers.
authors.forename: Joël Cabrel
authors.initials: JC
authors.lastname: Tchahame
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Beugnot
authors.forename: Alexandre
authors.initials: A
authors.lastname: Kudlinski
authors.forename: Thibaut
authors.initials: T
authors.lastname: Sylvestre