Characterized Brillouin scattering in silica optical fiber tapers based on Brillouin optical correlation domain analysis

Weiwen Zou, Wenning Jiang, and Jianping Chen

State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Key Laboratory of Navigation and Location Based Services, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 

Optics Express Vol. 21, Issue 5, pp. 6497-6502 (2013)

doi: 10.1364/OE.21.006497

Abstract

This paper demonstrates stimulated Brillouin scattering (SBS) characterization in silica optical fiber tapers drawn from commercial single mode optical fibers by hydrogen flame. They have different waist diameters downscaled from 5 μm to 42 μm. The fully-distributed SBS measurement along the fiber tapers is implemented by Brillouin optical correlation domain analysis technique with millimeter spatial resolution. It is found that the Brillouin frequency shift (BFS) in the waist of all fiber tapers is approximately the same (i.e., ~11.17 GHz at 1550 nm). However, the BFS is gradually reduced and the Brillouin gain decreases from the waist to the untapered zone in each fiber taper.