We show that the stimulated Brillouin scattering (SBS) is enhanced in photonic crystal fibres (PCF) with elliptical air holes characterized by air hole ellipticity η which is the ratio of major to minor axis of the elliptical hole. The study of SBS in elliptical photonic crystal fibres (EPCF) is based on a full modal analysis of the optical and acoustic properties using the finite element method. We investigate the influence of the shape of the air holes on Brillouin gain (gB) spectrum. We find that the interaction between optical and acoustic modes is enhanced in EPCF with a multi-peak behavior of the Brillouin gain spectrum. We also find that by squeezing the lattice of the air holes, the interaction between optical and acoustic waves is enhanced and the gB coefficient is increased.

Date Published: 27 February 2015
PDF: 11 pages
Proc. SPIE 9347, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV, 934719 (27 February 2015); doi: 10.1117/12.2080237

Published in SPIE Proceedings Vol. 9347:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV
Konstantin L. Vodopyanov, Editor(s)