Polarization dependence of stimulated Brillouin scattering in small-core photonic crystal fibers

摘要

Stimulated Brillouin scattering (SBS) generated from noise in small-core photonic crystal fibers (PCFs) exhibits a strong dependence on pump polarization. The polarization dependence of two small-core PCFs is investigated, yielding unexpected results. Both fibers exhibit birefringence resulting in a 90 degrees polarization dependence for the SBS and a 3 dB difference in the SBS threshold between polarizations corresponding to minimum and maximum SBS, respectively. Surprisingly, the transmission of the smaller-core fiber also exhibits a 180 degrees polarization dependence at lower powers due to polarization-dependent loss. (C) 2008 Optical Society of America