RT info:eu-repo/semantics/article
T1 Evaluation of the accuracy of BOTDA systems based on the phase spectral response
A1 López Gil, Alexia Inés
A1 Soto Hernández, Marcelo Alfonso
A1 Angulo Vinuesa, Xabier
A1 Domínguez López, Alejandro
A1 Martín López, Sonia
A1 Thévenaz, Luc
A1 González Herráez, Miguel
K1 Fiber optics
K1 Fiber optics sensors
K1 Scattering
K1 stimulated Brillouin
K1 Nonlinear optics
K1 fibers
K1 Ciencias tecnológicas
K1 Electrónica
K1 Technology
K1 Electronics
AB We evaluate the Brillouin frequency shift (BFS) determination error when utilizingthe Brillouin phase spectrum (BPS) instead of the Brillouin gain spectrum (BGS) in BOTDAsystems. Systems based on the BPS perform the determination of the BFS through a linear fitaround the zero de-phase frequency region. An analytical expression of the error obtained inthe BFS determination as a function of the different experimental parameters is provided andexperimentally validated. The experimental results show a good agreement with thetheoretical predictions as a function of the number of sampling points, signal-to-noise ratio(SNR) and Brillouin spectral linewidth. For an equal SNR and linewidth, the phase responseonly provides a better BFS estimation than the gain response when the fit is performed over arestricted frequency range around the center of the spectral profile. This may reduce themeasurement time of specific BOTDA systems requiring a narrow frequency scanning. Whenthe frequency scan covers most of the Brillouin spectral profile, gain and phase responsesgive very similar estimations of the BFS and the BPS offers no crucial benefit.
PB Optical Society of America
SN 1094-4087
YR 2016
FD 2016-07-25
LK http://hdl.handle.net/10017/26237
UL http://hdl.handle.net/10017/26237
LA eng
NO Ministerio de Economía y Competitividad
DS MINDS@UW
RD 25-abr-2024