Abstract

We report high Brillouin frequency shifts of $0.08\pm 0.02\mathrm{MHz}/\mathrm{N}$ in a 60 cm ${\mathrm{As}}_2{\mathrm{Se}}_3$-Poly(methyl methacrylate) (${\mathrm{As}}_2{\mathrm{Se}}_3$-PMMA) hybrid microtaper with 2 μm ${\mathrm{As}}_2{\mathrm{Se}}_3$ core and 100 μm PMMA cladding diameters under a transverse load. Through finite element analysis of stimulated Brillouin scattering under the influence of contact stress from the loading fixture, such shifts are in accordance with a numerical value of $0.06\pm 0.01\mathrm{MHz}/\mathrm{N}$. Further numerical analysis shows that uncertainties in the Brillouin frequency shift are the result of birefringence that is 27 times stronger than what is found in standard silica fibers.

© 2019 Optical Society of America

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