Characterization of Brillouin Scattering Spectrum in LEAF Fiber

Characterization of Brillouin Scattering Spectrum in LEAF Fiber

Show full item record

Title: Characterization of Brillouin Scattering Spectrum in LEAF Fiber
Author: Liu, Xuan
Abstract: Fiber optic sensors are designed to measure various parameters. The distributed fiber optics sensor has been a very promising candidate for the structural health monitoring. In this thesis, we characterized LEAF (Large Effective Area Fiber) fiber’s Brillouin scattering spectrum and investigated its potentiality for the distributed Brillouin temperature and strain sensor. Optical fibers with complex refractive index profiles are applied to improve the Brillouin threshold by varying the Brillouin linewidth. As LEAF fiber has a modified refractive index profile, we investigated its Brillouin linewidth’s dependence on the square of the pump light’s frequency. We verified the Brillouin frequency’s variation with input SOP experimentally for LEAF fiber in the spontaneous regime. This sets a limitation for the frequency resolution of distributed Brillouin sensors. We also realized a simultaneous temperature and strain sensor with LEAF fiber applying the Brillouin optical time domain analysis. Based on the direct detection of LEAF beat frequencies, a simultaneous strain and temperature sensor was demonstrated.
Date: 2011
URI: http://hdl.handle.net/10393/20474
Supervisor: Bao, Xiaoyi
Faculty: Sciences / Science
Degree: MSc

Files in this item

Files Size Format View
Liu_Xuan_2011_Thesis.pdf 2.483Mb application/pdf View/Open

This item appears in the following Collection(s)

Show full item record


Contact information

Morisset Hall (map)
65 University Private
Ottawa ON Canada
K1N 6N5

Tel. 613-562-5800 (4563)
Fax 613-562-5195

ruor@uottawa.ca